Viper 64mm EDF - Remote control toy E-flite - Free user manual and instructions

Product Type	Remote Control Jet
Brand	E-flite
Model	Viper 64mm EDF
Wingspan	780 mm (30.7 in)
Length	860 mm (33.9 in)
Flying Weight	650 g (22.9 oz)
Motor	Brushless EDF 64mm, 4200 kV
Speed Controller	30A Brushless ESC (installed)
Servos	4 micro servos (installed)
Recommended Battery	3S 11.1V 1300-1800mAh LiPo
Control Channels	4 (throttle, aileron, elevator, rudder)
Radio System	DSM2/DSMX compatible (not included)
Flight Time	4-6 minutes
Range	Up to 500 m (dependent on radio)
Construction Material	Evolved foam with reinforced plastic
Assembly Required	Minimal assembly (attach wings, install battery)
Skill Level	Advanced (experienced pilot recommended)
Spare Parts Available	Yes (wing, fuselage, fan unit, etc.)
Maintenance	Clean with dry cloth; check screws and wiring before flight
Safety Warnings	Not a toy; keep away from children; fly in open areas
Certifications	CE, FCC

Frequently Asked Questions - Viper 64mm EDF E-flite

What battery is recommended for the E-flite Viper 64mm EDF?

The recommended battery is a 3S 11.1V LiPo with a capacity of 1300-1800mAh and a discharge rating of at least 30C.

What is the range of this RC jet?

Range depends on the radio system used, but with a typical DSM2/DSMX transmitter, it can handle up to 500 meters under optimal conditions.

Is the E-flite Viper 64mm EDF suitable for beginners?

No, this model is designed for experienced pilots due to its high speed and EDF power system. Beginners should start with a trainer.

Does the Viper come with a transmitter?

No, it is a Bind-N-Fly (BNF) version, requiring a compatible DSM2/DSMX transmitter (not included).

How long does the battery last?

Flight time is typically 4-6 minutes depending on throttle usage and battery capacity.

What type of motor does it have?

It features a 64mm Electric Ducted Fan (EDF) unit with a high-kV brushless motor, providing excellent thrust.

Are spare parts available?

Yes, E-flite offers a wide range of spare parts including wings, fuselage, fan unit, and landing gear.

How do I maintain the aircraft?

After each flight, clean the airframe with a dry cloth, check all screws and wiring connections, and inspect the fan for debris.

What safety precautions should I take?

Always fly in a large, open area away from people and obstacles. Ensure battery is properly secured and follow local regulations.

Can I upgrade the battery to 4S?

The stock ESC and motor are rated for 3S only. Using a 4S battery may damage components unless upgraded.

USER MANUAL Viper 64mm EDF E-flite

Scan the QR code and select the Manuals and Support quick links from the product page for the most up-to-date manual information.

All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby, LLC. For up-to-date product literature, visit horizonhobby.com or towerhobbies.com and click on the support or resources tab for this product.

MEANING OF SPECIAL LANGUAGE

The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:

WARNING: Procedures, which if not properly followed, create the probability of property damage, collateral damage, and serious injury OR create a high probability of superficial injury.

CAUTION: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility of serious injury.

NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND little or no possibility of injury.

WARNING: Read the ENTIRE instruction manual to become familiar with the features of the product before operating. Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.

This is a sophisticated hobby product. It must be operated with caution and common sense and requires some basic mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury or damage to the product or other property. This product is not intended for use by children without direct adult supervision. Do not use with incompatible components or alter this product in any way outside of the instructions provided by Horizon Hobby, LLC. This manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.

AGE RECOMMENDATION: Not for children under 14 years. This is not a toy.

Safety Precautions and Warnings

As the user of this product, you are solely responsible for operating in a manner that does not endanger yourself and others or result in damage to the product or the property of others.

• Always keep a safe distance in all directions around your model to avoid collisions or injury. This model is controlled by a radio signal subject to interference from many sources outside your control. Interference can cause momentary loss of control.
• Always operate your model in open spaces away from full-size vehicles, traffic and people.
• Always carefully follow the directions and warnings for this and any optional support equipment (chargers, rechargeable battery packs, etc.).
• Always keep all chemicals, small parts and anything electrical out of the reach of children.
• Always avoid water exposure to all equipment not specifically designed and protected for this purpose. Moisture causes damage to electronics.

• Never place any portion of the model in your mouth as it could cause serious injury or even death.

• Never operate your model with low transmitter batteries.
  • Always keep aircraft in sight and under control.
  • Always use fully charged batteries.
  • Always keep transmitter powered on while aircraft is powered.
  • Always remove batteries before disassembly.
  • Always keep moving parts clean.
  • Always keep parts dry.
  • Always let parts cool after use before touching.
  • Always remove batteries after use.
  • Always ensure failsafe is properly set before flying.

• Never operate aircraft with damaged wiring.
• Never touch moving parts.

WARNING AGAINST COUNTERFEIT PRODUCTS: If you ever need to replace your Spektrum receiver found in a Horizon Hobby product, always purchase from Horizon Hobby, LLC or a Horizon Hobby authorized dealer to ensure authentic high-quality Spektrum product. Horizon Hobby, LLC disclaims all support and only with regards, but not limited to, compatibility and performance of counterfeit products or products claiming compatibility with DSM or Spektrum technology.

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Table of Contents

Model Assembly	4
Horizontal Stabilizer Installation	4
Nose Cone Installation	5
Wing Installation	5
Ventral Fin Installation	6
Ventral Fin Storage	6
Main Gear Installation	7
Nose Gear Installation	7
Nose Gear Quick Release	8
Receiver Installation PNP	8
AR631+ Installation	8
AR631+ Port Assignments	8
Bnd/Prg/SRXL2	8
Auto Transmitter Setup	9
To load the Smart Transmitter Files:	9
Pre-Loaded Transmitter File Operation Notes	9
Manual Transmitter Setup	10
Dual Rates	10
Exponential	10
General Binding Tips and Failsafe	11
Transmitter and Receiver Binding / Enable or Disable SAFE Select	11
Using The Bind Button	11
Using The Bind Plug	11
SAFE® Select Technology	12
Differences Between SAFE and AS3X Modes	12
SAFE® Select Switch Designation	12
Assigning a Switch	12
Battery Installation and ESC Arming	13
Low Voltage Cutoff (LVC)	13
Center of Gravity	13
Control Horn and Servo Arm Settings	14
Dual Rates and Control Throws	14
In Flight Trimming	15
Control Direction Test	15
AS3X Response Test	16
Control Surface Centering	16
Hand Launch	16
Post Flight	17
Power System Installation and Service	17
Disassembly	17
Winglet Repair	18
Troubleshooting Guide AS3X	19
Troubleshooting Guide	19
Replacement Parts	20
Recommended Parts	20
Optional Parts	20
Hardware List	20
Important Federal Aviation Administration (FAA) Information	21
AMA National Model Aircraft Safety Code	21
Limited Warranty	22
Contact Information	23
FCC Information	23
Supplier's Declaration of Conformity	23
IC Information	23
Compliance Information for the European Union	23

Specifications

Wingspan 42.2" (1072mm)
Length 36.77" (934mm)
Weight	Without Battery: 32 oz (910g)With Recommended 4S 2200mAh Battery: 41.3 oz (1170.7g)

Included Equipment

Receiver	AR631+ DSMX 6-Channel AS3X & SAFE Receiver (SPM-1031) (BNF Only)
ESC	AvianTM 70-Amp Smart Lite Brushless ESC, 3S–6S with IC3 Connector (SPMXAE70B)
Motor Brushless Outrunner Motor, 2840–3150Kv 6-pole (SPMXAM4300)
Servos	(6) Elevator, Left and Right Flap, Left and Right Aileron, and Rudder: A334 Sub-Micro Digital 9g Servo (SPMSA334)(1) Nose Gear Steering:A334R Sub-Micro Digital 9g Servo, Reversed (SPMSA334R)

Required Equipment

Transmitter	Full range 5-7+Channel 2.4GHz w/ Spektrum DSM2/DSMX® Technology
Battery	4S 14.8V 2200–3200mAh LiPo with EC3TM or IC3® Connector
Battery Charger 4	Cell Li-Po Battery Balancing Charger
Receiver 5+ Channel (AR631 + Recommended) (PNP Only)

Model Assembly

Horizontal Stabilizer Installation

1. Carefully deflect the rudder fully to the left or the right.
2. Slide the horizontal stabilizer into the fuselage.
3. Insert three countersunk machine screws (M3 x 10mm) through the horizontal stabilizer and into the holes in the fuselage.
4. Use a 2mm hex wrench to tighten the screws.
5. Press and snap in place the elevator to each elevator control horn using ball link pliers.

NOTICE: Do not overtighten the screws.

Technical line drawing of a mechanical component with directional arrows indicating movement (no text or symbols)

Technical line drawing of a mechanical component with no visible text or symbols

Nose Cone Installation

1. Align the nose cone with the front of the fuselage and allow the magnets to secure it in place.

Line drawing of a handheld device emitting a pointed tip, with no text or symbols present

Wing Installation

1. Invert the fuselage, and place the wing in position.
2. Attach the wing to the fuselage with six countersunk machine screws (M3 x 10mm).

NOTICE: Do not overtighten the screws.

Ventral Fin Installation

1. Install the left and right ventral fins with the gray side facing in. A magnet will secure the ventral fins in place.

Line drawing of an aircraft fuselage with internal components and a highlighted section (no text or symbols)

Pure technical line drawing of a mechanical assembly without any text, numbers, or symbols

Ventral Fin Storage

If ventral fins are not in use they can be stored in the battery compartment under the canopy as shown. Align the magnet with the screw head on each side of the battery compartment.

Technical line drawing of an aircraft fuselage showing internal components and structural details (no text or symbols)

Top-down line drawing of an airplane viewed from the side (no text or symbols)

Main Gear Installation

1. Guide the end of the right main gear strut into the landing gear mount on the bottom of the wing.
2. Rotate the strut until it snaps into the secure position in the clip.
3. Repeat steps one and two for the left side main gear.

Technical line drawing of a mechanical assembly with a lever and base component (no text or symbols)

Technical line drawing of a mechanical assembly with a circular component and mounting brackets (no text or symbols)

Nose Gear Installation

1. Remove the canopy from the fuselage.
2. Guide the end of the nose gear strut assembly into the nose gear bracket on the bottom of the fuselage.
3. Install the pushrod (A) in the first hole on the nose gear steering arm (B).
4. Install the nose gear steering arm to the top of the nose gear strut assembly (C) and secure using the M3 x 7mm thumb screw (D). (Ensure the nose gear is aligned straight when the aircraft is first powered ON, adjustment may be required.)

Technical line drawing of a ship's deck structure with a support structure and an upward arrow indicating motion (no text or symbols)

EN

Nose Gear Quick Release

1. Remove the thumb screw from the steering arm.
2. Slide the nose gear out of the bottom of the aircraft.

Technical line drawing of a mechanical component with a pulley attachment (no text or symbols)

Receiver Installation PNP

The recommended receiver for this aircraft is the Spektrum AR631+. If you choose to install a different receiver, ensure that it is at least a 6-channel full range receiver. Refer to the manual of your chosen receiver for correct installation and operation instructions.

AR631 + Installation

1. Slide the canopy latch back and lift the back of the canopy to remove the canopy from the fuselage.
2. Attach the appropriate control surfaces to the their respective ports on the receiver using the table at the right.
3. Using double-sided servo tape, mount the receiver as far back in the battery compartment as possible. The receiver should be mounted parallel to the length of the fuselage, with the label facing up and the servo ports facing the rear of the aircraft, as shown. The orientation of the receiver is critical for all AS3X® and SAFE® technology setups.
4. Route the antenna into the antenna tube.

CAUTION: Incorrect installation of the receiver could cause a crash.

Auto Transmitter Setup

The AR631+ receiver, included with your Viper 64mm, is programmed with an all-new version of AS3X/SAFE. This includes a Smart Transmitter File, with the setup developed specifically for the Viper 64mm. This allows you to quickly import the settings for your transmitter, directly from your receiver, during the binding process.

Supported Transmitters and firmware requirements:

• All NX Transmitters (with firmware version 4.0.11+)
• iX14 (with app version 2.0.9+)
• iX20 (with app version 2.0.9+)

Important: iX12 and DX Transmitters do not support Smart Transmitter File transfers at this time.

To load the Smart Transmitter Files:

1. Power ON the transmitter.
2. Create a new blank model file on your transmitter.
3. Power ON the receiver.
4. Press the bind button on the receiver.
5. Put the transmitter into bind mode. The model will bind normally.
6. Once binding is complete the download screen will appear as shown at the right.
7. Select LOAD to continue.

The NOTICE screen, as shown at the right, is a warning that downloading will overwrite all the information of the current model. If this a new “blank” model it will simply populate the transmitter parameters of the Viper 64mm into the selected model and rename it Viper 64mm.

NOTICE: Confirming will override any previously saved transmitter setups.

1. Press CONFIRM to continue.
2. Once the download is complete the file will be installed on your transmitter and the telemetry information will be loaded automatically.

Once loading is complete the radio will return to the home screen, and you will see "Viper 64mm BNF-B EFL07750".

Transmitter setup is now complete, and you are ready to fly your aircraft.

Pre-Loaded Transmitter File Operation Notes

Flight Modes Active with Flap System

The imported file activates Flight Modes, setting them to the Flap switch (D). It also changes the Trim setting from Common, to Flight Mode. This allows aileron, elevator, and rudder trims to be separately adjusted for each flap setting. In-flight trim for all three axes is now independent, which provides the ability to precisely trim the model for each flap position.

Trim for each Flight Mode Switch (D) position:

POS 0: Trim all three axes for flaps up (normal)
POS 1: Trim all three axes for partial flaps (take-off)
POS 2: Trim all three axes for full flaps (landing)

Flight Timer

There is no flight timer loaded in the transmitter setup file. The voltage monitor provides alerts when the battery voltage has dropped to just above the LVC, indicating it is time to land. This system only functions when using Smart batteries. If you are not using a Smart battery, set your flight timer to monitor your flight time.

iX series: The photo imported for the iX series is a representation of a jet. See your transmitter manual for instructions to change the photo, if desired.

Smart Transmitter FileThe receiver contains a pre-loaded Smart Transmitter file.RX Version: EFL07750 Firmware versionDo you want to the load the file from the receiver
SKIP LOAD

NOTICEThis WILL overwrite ALL current model settings.If stock BNF model hardware has changed, the receiver's file may not work properly- Do not use without checking everything.Do you want to the load the file from the receiver
BACK CONFIRM

Manual Transmitter Setup

IMPORTANT: After you set up your model, always rebind the transmitter and receiver to set the desired failsafe positions.

SAFE Select is best enabled via Forward Programming. SAFE® Select technology can be assigned to any open switch (2 or 3 position) controlling a channel (5–9) on your transmitter. Refer to the safe select designation section of this manual to assign safe select to your desired transmitter switch.

To use the FLAP channel for the SAFE Select switch the values must be set to +100 and -100 and the speed set to 0 temporarily to assign the safe switch in the flap system menu. Then change the flap systems values back to the listing in the transmitter setup. See the SAFE Select Switch Designation section of this manual to assign the switch for SAFE Select.

For the first flight, set the flight timer to 3 minutes when using a 4S 2200mAh battery. Adjust the time after the initial flight.

NX Series Transmitter Setup

1. Power ON your transmitter, click on scroll wheel, roll to System Setup and click the scroll wheel. Select YES.

2. Go to Model Select and choose Add New Model near the bottom of the list. Select Airplane Model Type by choosing airplane image, select Create.

3. Set Model Name: Input a name for your model file.

4. Go to Aircraft Type and scroll to the wing selection, choose Wing: 1 Ail 1 Flap Tail: Normal

5. Select Main Screen, Click the scroll wheel to enter the Function List.

6. Go to D/R (Dual Rate) and Expo menu to set D/R and Expo.

7. Set Rates and Expo: AileronSet Switch: Switch FSet High Rates: 100%, Expo 10% — Low Rates: 70%, Expo 5%

8. Set Rates and Expo: ElevatorSet Switch: Switch CHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

9. Set D/R (Dual Rate) and Expo: RudderSet Switch: Switch GHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

10. Set Throttle Cut; Switch: Switch H, Position: -100%

11. Select Flap SystemSet Switch: Switch DSet Flaps: POS 0: -100%, POS 1: 0%, POS 2: 100%Set Elev: POS 0: 0%, POS 1: -2%, POS 2: -3%Set Speed: 2.0

iX Series Transmitter Setup

1. Power ON your transmitter and begin once the Spektrum AirWare app is open.Select the orange pen icon in the screen’s upper left corner, the system asks for permission toTurn Off RF, selectPROCEED.

2. Select the three dots in the upper right corner of the screen,selectAdd a New Model.

3. SelectModel Option, chooseDEFAULT, selectAirplane.The system asks if you want to create a new acro model, selectCreate.

4. Select the last model on the list, namedAcro.Tap on the word Acro and rename the file to a name of your choice.

5. Press and hold the back arrow icon in the upper left corner of the screen to return to the main screen.

6. Go to theModel Setupmenu. SelectAircraft Type. The system asks for permission toTurn Off RF, selectPROCEED. Touch the screen to select wing.Select 1 Ail 1 Flap.

7. Press and hold the back arrow icon in the upper left corner of the screen to return to the main screen.

Dual Rates

Attempt your first flights in low rate. For landings, use high rate elevator.

NOTICE: To ensure AS3X technology functions properly, do not lower rate values below 50%. If less control deflection is desired, manually adjust the position of the pushrods on the servo arm.

NOTICE: If oscillation occurs at high speed, refer to the Troubleshooting Guide for more information.

Exponential

After first flights, you may adjust exponential in your transmitter.

DX Series Transmitter Setup

1. Power ON your transmitter, click on scroll wheel, roll to System Setup and click the scroll wheel. Select YES.

2. Go to Model Select and choose Add New Model at the bottom of the list.The system asks if you want to create a new model, select Create.

3. Set Model Type: Select Airplane Model Type by choosing the airplane.The system asks you to confirm model type, data will be reset. Select YES.

4. Set Model Name: Input a name for your model file.

5. Go to Aircraft Type and scroll to the wing selection,choose Wing: 1 Ail 1 Flap Tail: Normal

6. Select Main Screen, Click the scroll wheel to enter the Function List.

7. Set D/R (Dual Rate) and Expo: AileronSet Switch: Switch FSet High Rates: 100%, Expo 10% — Low Rates: 70%, Expo 5%

8. Set D/R (Dual Rate) and Expo: ElevatorSet Switch: Switch CHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

9. Set D/R (Dual Rate) and Expo: RudderSet Switch: Switch GHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

10. Set Throttle Cut; Switch: Switch H, Position: -100%

11. Select FlapsSet Switch: Switch DSet Flaps: POS 0: -100%, POS 1: 0%, POS 2: 100%Set Elev: POS 0: 0%, POS 1: -2%, POS 2: -3%Set Speed: 2.0

iX Series Transmitter Setup

8. Go to the Model Adjust menu.

9. Set Dual Rates and Expo: Select AileronSet Switch: Switch FSet High Rates: 100%, Expo 10% — Low Rates: 70%, Expo 5%

10. Set Dual Rates and Expo: Select ElevatorSet Switch: Switch CHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

11. Set D/R (Dual Rate) and Expo: RudderSet Switch: Switch GHigh Rates: 100%, Expo 10% — Low Rates 70%, Expo 5%

12. Select Flap SystemSet Switch: Switch DSet Flaps: POS 0: -100%, POS 1: 0%, POS 2: 100%Set Elev: POS 0: 0%, POS 1: -2%, POS 2: -3%Set Speed: 2.0

13. Set Throttle Cut: Switch: Switch H, Position: -100%

General Binding Tips and Failsafe

• The included receiver has been specifically programmed for operation of this aircraft. Refer to the receiver manual for correct setup if the receiver is replaced.
• Keep away from large metal objects while binding.
• Do not point the transmitter's antenna directly at the receiver while binding.

• The red LED on the receiver will flash rapidly when the receiver enters bind mode.

• Once bound, the receiver will retain its bind settings for that transmitter until you re-bind.

• If the receiver loses transmitter communication, the failsafe will activate. Failsafe moves the throttle channel to low throttle. Pitch and roll channels move to actively stabilize the aircraft in a descending turn.
• If problems occur, refer to the troubleshooting guide or if needed, contact the appropriate Horizon Product Support office.

Transmitter and Receiver Binding / Enable or Disable SAFE Select

The BNF Basic version of this airplane includes SAFE Select technology, enabling you to choose the level of flight protection. SAFE mode includes angle limits and automatic self leveling. AS3X mode provides the pilot with a direct response to the control sticks. SAFE Select is enabled or disabled during the bind process. With SAFE Select disabled the aircraft is always in AS3X mode. With SAFE Select enabled the aircraft will be in SAFE Select mode all the time, or you can assign a switch to toggle between SAFE Select and AS3X modes.

Thanks to SAFE Select technology, this aircraft can be configured for full-time SAFE mode, full-time AS3X mode, or mode selection can be assigned to a switch.

Using The Bind Button...
To Enable SAFE Select To Enable SAFE Select

Bind TX to RX

SAFE SELECT ENABLED: The control surfaces cycle back and forth twice with a slight pause at neutral position every time the receiver is powered on.

To Disable SAFE Select To Disable SAFE Select

Orange Flashing LED
Release Bind Button
Bind TX to RX

SAFE SELECT DISABLED: The control surfaces cycle back and forth once every time the receiver is powered on.

IMPORTANT: Before binding, read the transmitter setup section in this manual and complete the transmitter setup table to ensure your transmitter is properly programmed for this aircraft.

IMPORTANT: Move the transmitter flight controls (rudder, elevators, and ailerons) and the throttle trim to neutral. Move the throttle to low before and during binding. This process defines the failsafe settings.

You can use either the bind button on the receiver case OR a conventional bind plug to complete the binding and SAFE Select process.

SAFE Select can also be enabled via Forward Programming.

Using The Bind Plug...

Bind TX to RXOrang

Flashi

[Non-Text]

Remove Bind Plug

Bind TX to RXOran

SAFE SELECT ENABLED: The control surfaces cycle back and forth twice with a slight pause at neutral position every time the receiver is powered on.

Install Bind Plug

Lower Throttle

Connect Power

Orange Flashing LED

Bind TX to RX

Remove Bind Plug

SAFE SELECT DISABLED: The control surfaces cycle back and forth once every time the receiver is powered on.

SAFE® Select Technology

When flying in SAFE Select mode the aircraft will return to level flight any time the aileron and elevator controls are at neutral. Applying aileron or elevator control will cause the airplane to bank, climb or dive, and the amount the stick is moved will determine the attitude the airplane flies. Holding full control will push the aircraft to the pre-determined pitch and roll limits, but it will not go past those angles.

When flying with SAFE Select it is normal to hold the control stick deflected with moderate aileron input when flying through a turn. To fly smoothly with SAFE Select avoid making frequent control changes and don't attempt to correct for minor

deviations. With SAFE Select, holding deliberate control inputs will command the aircraft to fly at a specific angle and the model will make all corrections to maintain that flight attitude.

Return the elevator and aileron controls to neutral before switching from SAFE Select mode to AS3X mode. If you do not neutralize controls when switching into AS3X mode, the control inputs used for SAFE Select mode will be excessive for AS3X mode and the aircraft will react immediately.

Differences Between SAFE and AS3X Modes

This section is generally accurate but does not take into account flight speed, battery charge status, and other limiting factors.

		SAFE Select AS3X
Control Input	Control stick is neutralized	Aircraft will self level	Aircraft will continue to fly at its present attitude
	Holding a small amount of control	Aircraft will bank or pitch to a moderate angle and maintain the attitude	Aircraft will continue to pitch or roll slowly
	Holding full control	Aircraft will bank or pitch to the predetermined limits and maintain the attitude	Aircraft will continue to roll or pitch rapidly

SAFE® Select Switch Designation

SAFE® Select technology can be assigned to any open switch (2 or 3 position) controlling a channel (5–9) on your transmitter. Once assigned to a switch, SAFE select ON gives you the flexibility to choose SAFE technology or AS3X mode while in flight. If the aircraft is bound with SAFE select OFF, the aircraft will be in AS3X mode exclusively.

IMPORTANT: Before assigning your desired switch, ensure that the travel for that channel is set at 100% in both directions and the aileron, elevator, rudder and throttle are all on high rate with the travel at 100%.

CAUTION: Keep all body parts well clear of the rotor and keep the aircraft securely restrained in case of accidental throttle activation.

TIP: SAFE Select is assignable on any unused channels 5–9. See your transmitter manual for more information about assigning a switch to a channel.

TIP: Use your radio channel monitor to confirm that the four primary channels are showing 100% travel while assigning the switch.

TIP: Use the channel monitor to make sure the switch you are assigning for SAFE Select is active and driving a channel between 5-9 and that it is traveling 100% in each direction.

TIP: Make sure your four primary channels are not reversed if you are having trouble assigning a SAFE Select switch.

Assigning a Switch

1. Bind the aircraft to choose SAFE Select ON. This will allow the system to be assigned to a switch.
2. Hold both transmitter sticks to the inside bottom corners and toggle the desired switch 5 times (1 toggle = full up and down) to assign that switch. The control surfaces of the aircraft will move, indicating the switch has been selected.

Repeat the process to assign a different switch or to deactivate the current switch if desired.

Battery Installation and ESC Arming

We recommend a 4S 2200mAh 50C LiPo battery with IC3 connector. If using a different battery, the battery should be of similar capacity, dimensions and weight to fit in the fuselage. Always be sure the model balances at the recommended CG with the battery chosen.

1. Apply the loop side (soft side) of the hook and loop tape to the bottom of the battery.
2. Slide the canopy latch back and lift the back of the canopy to remove it.
3. Power on the transmitter and wait 5 seconds.
4. Lower the throttle to the lowest setting.
5. Install the fully charged battery in the battery compartment as shown. See the Adjusting the Center of Gravity instructions for more information.
6. Secure the flight battery with the hook and loop strap.
7. Connect the ESC to the battery power lead IC3 connector, noting the correct polarity. The ESC will emit opening chime.
8. The first set of tones, 1 beep for each cell in the connected LiPo battery pack.
9. Rising beep for ending chime.

NOTICE: Connecting the battery to the ESC with incorrect polarity will damage the ESC and void the warranty.

1. The ESC is now ready for use.*
2. Reinstall the canopy hatch by sliding the hatch pin latch back on the fuselage. Ensure the hatch pin engages.

Low Voltage Cutoff (LVC)

When a Li-Po battery is discharged below 3V per cell, it will not hold a charge. The aircraft's ESC protects the flight battery from over-discharge using Low Voltage Cutoff (LVC). Once the battery discharges to 3V per cell, the LVC will reduce the power to the motor in order to leave adequate power to the receiver and servos to land the airplane.

When the motor power decreases, land the aircraft immediately and replace or recharge the flight battery.

Always disconnect and remove the Li-Po battery from the aircraft after each flight. Charge your Li-Po battery to about half capacity before storage. Make sure the battery charge does not fall below 3V per cell. Failure to unplug a connected battery will result in trickle discharge.

For your first flights, set your transmitter timer or a stopwatch to 3 minutes. Adjust your timer for longer or shorter flights once you have flown the model.

NOTICE: Repeated flying to LVC will damage the battery.

Center of Gravity

WARNING: Install the battery but do not connect it to the ESC while checking the CG. Personal injury may result.

The CG range is 80mm +/-5mm behind the leading edge at the wing root. Always check the CG location with model inverted.

The CG location is adjusted by moving the battery pack forward or backward in the battery compartment.

NOTICE: The CG of the Viper should be checked in the configuration you are going to fly. If you will fly it with landing gear, the landing gear must be installed. If you will hand launch your Viper, the CG should be checked with the landing gear removed.

Control Horn and Servo Arm Settings

The table to the right shows the factory settings for the control horns and servo arms. Fly the aircraft at factory settings before making changes.

NOTICE: If control throws are changed from the factory settings, the AR631+ gain values may need to be adjusted. Refer to the Spektrum AR631+ manual for adjustment of gain values.

After flying, you may choose to adjust the linkage positions for the desired control response. See the table to the right.

Factory Setting Control Horns Servo Arms
Aileron
Elevator
Rudder
Flaps
Nose Wheel Steering

Dual Rates and Control Throws

Program your transmitter to set the rates and control throws based on your experience level. These values have been tested and are a good starting point to achieve a successful first flight.

CAUTION: Do not use flaps when the landing gear are not installed. Damage to the flaps and/or the flap servos may result.

After flying, you may choose to adjust the values for the desired control response.

Aileron
Elevator
Rudder
Flap Travel	H Elevator

In Flight Trimming

During your first flight, trim the aircraft for level flight. Make small trim adjustments with your transmitter's trim switches to straighten the aircraft's flight path.

After adjusting the trim, do not touch the control sticks for 3 seconds. This allows the receiver to learn the correct settings to optimize AS3X performance.

Failure to do so could affect flight performance.

Control Direction Test

WARNING: Do not perform this or any other equipment test without turning on throttle cut. Serious injury or property damage could result in the motor starting inadvertently.

If the control surfaces do not respond as shown, DO NOT FLY. Refer to the Troubleshooting Guide for more information. If you need more assistance, contact the appropriate Horizon Hobby Product Support department.

1. Power on the transmitter.
2. Enable the throttle cut.
3. Connect the battery.
4. Use the transmitter to operate the aileron, elevator and rudder controls.

NOTICE: View the aircraft from the rear when checking the control directions.

Ailerons

1. Move the aileron stick to the left. The left aileron should move up and the right aileron down, which will cause the aircraft to bank left.
2. Move the aileron stick to the right. The right aileron should move up and the left aileron down, which will cause the aircraft to bank right.

Elevators

1. Pull the elevator stick back. The elevators should move up, which will cause the aircraft to pitch up.
2. Push the elevator stick forward. The elevators should move down, which will cause the aircraft to pitch down.

Rudder

1. Move the rudder stick to the left. The rudder should move to the left, which will cause the aircraft to yaw left.
2. Move the rudder stick to the right. The rudder should move to the right, which will cause the aircraft to yaw right.

	Transmitter Command	Control Surface Response (viewed from the rear)
Aileron
ElevatorRudder

AS3X Response Test

This test ensures that the AS3X® control system is functioning properly. Assemble the aircraft and bind your transmitter to the receiver before performing this test.

1. Raise the throttle just above 25%, then lower the throttle to activate AS3X.

CAUTION: Keep all body parts, hair and loose clothing away from a moving propeller, as these items could become entangled.

1. Move the entire aircraft as shown and ensure the control surfaces move in the direction indicated in the graphic. If the control surfaces do not respond as shown, do not fly the aircraft. Refer to the receiver manual for more information.

Once the AS3X system is active, control surfaces may move rapidly. This is normal. AS3X remains active until the battery is disconnected.

Due to different effects of torque, lift, and drag some aircraft require trim changes with different speeds and throttle settings. Mixes are preloaded into the receiver to compensate for these changes. The mixes become active the first time the throttle is raised above 25%. The control surfaces may be offset slightly at different throttle settings after the first time throttle is raised. Trimming the plane in flight should be done at 80-100% throttle for best results.

Aircraft movement AS3X Reaction

ElevatorAileronRudder

Control Surface Centering

After assembly and transmitter setup, confirm that the control surfaces are centered. If the control surfaces are not centered, mechanically center the control surfaces by adjusting the linkages.

If adjustment is required, turn the ball link on the linkage to change the length of the linkage between the servo arm and the control horn. Ball link pliers are recommended for removal and replacement of ball links.

After binding a transmitter to the aircraft receiver, set the trims and sub-trims to 0, then adjust the ball links to center the control surfaces.

Technical line drawing of a propeller or fan assembly with no visible text or symbols

Hand Launch

The BNF version of the Viper 64mm is equipped with Hand Launch Assist Mode which takes the stress out of hand launching your aircraft. The system works in the background to level the wings and set the model in a positive climb attitude, even after a less than perfect hand launch.

To activate Hand Launch Assist Mode:

1. Make sure SAFE Select is enabled.
2. Place the model in SAFE mode.
3. Advance the throttle above 70%.
4. Hand launch the model as you normally would. The acceleration of throwing the model automatically activates the assist mode, leveling the wings and setting the model in a positive climb attitude.
5. After a few seconds of flight the system automatically disengages and reverts to normal SAFE mode.
6. The system automatically resets after landing when the throttle is reduced below 5%, and the model is stationary for more than 5 seconds.

Line drawing of a military jet with a hand interacting with the nose (no text or symbols)

Post Flight

Disconnect the flight battery from the ESC (required for safety and battery life).

Power OFF the transmitter.

Remove the flight battery from the aircraft.

Recharge the flight battery to storage voltage level.

Repair or replace all damaged parts.

Store the flight battery apart from the aircraft and monitor the battery charge.

Make note of the flight conditions and flight plan results, planning for future flights.

Power System Installation and Service

CAUTION: Always disconnect the flight battery before performing service on any of the power system components.

Disassembly

1. Remove the wing to access all of the power system components.
2. Remove the two M3 x 8mm machine screws (Phillips head) (A) from the fan unit tabs.
3. Remove the fan unit (B) the fuselage and disconnect the motor leads from the ESC.
4. Remove the spinner (C) from the rotor by removing the M3 x 8 machine screw (phillips head) (D) from the motor shaft adapter (E).
5. Remove the rotor (F).
6. Remove the set screw (G) and remove the motor shaft adapter from the motor (H).
7. Remove the four M2.5 x 6mm machine screws (I) to remove the motor from the fan shroud (J).
8. Carefully slide the ESC (K) from the top of the fuselage.
9. Disconnect the throttle lead from the receiver and lift the ESC from the fuselage, taking note of the routing of the power and throttle leads through the upper fuselage.

Assembly

Assemble in reverse order.

• Correctly align and connect the motor wire colors with the ESC wires.
• Ensure the front of the rotor is installed facing the nose of the aircraft.
• A tool is required to tighten the nut on the rotor and collet.
• Ensure no wiring is pinched by any of the power components.
• Ensure the ESC cover is securely glued to the fuselage.
• Ensure the spinner is fully connected for safe operation.

Technical diagram of a mechanical component with a labeled component 'K' and directional arrow (no text or symbols beyond label)

IMPORTANT: Allow the aircraft components to cool between flights.

Winglet Repair

In some instances the winglet may be damaged during a rough landing, and replacement is necessary. Follow the steps below to remove and install a new winglet.

1. Cut a quarter inch into the foam along this highlighted seam on the top of the wing.
2. Cut quarter inch into the foam along this highlighted seam on the bottom of the wing as shown.
3. Carve out the remaining block shape of foam as shown.
4. Apply flexible contact adhesive to the mating surfaces and install the new winglet in position.

Pure technical line drawing of a mechanical component or bracket assembly without any text, numbers, or symbols

Technical line drawing of a mechanical component with a downward arrow indicating direction (no text or symbols)

Troubleshooting Guide AS3X

Problem Possible Cause Solution
Oscillation	Damaged rotor or spinner Replace rotor or spinner
	Imbalanced rotor Balance the rotor
	Motor vibration Replace parts or correctly align all parts and tighten fasteners as needed
	Loose receiver Align and secure receiver in fuse age
	Loose aircraft controls Tighten or otherwise secure parts (servo, arm, linkage, horn and control surface)
	Worn parts Replace worn parts (especially propeller, spinner or servo)
	Irregular servo movement Replace servo
Inconsistent flight performance	Trim is not at neutral If you adjust trim more than 8 clicks, adjust the clevis to remove trim
	Sub-Trim is not at neutral No Sub-Trim is allowed. Adjust the servo linkage
	Aircraft was not kept immobile for 5 seconds after battery connection	With the throttle stick in lowest position. Disconnect battery, then reconnect battery and keep the aircraft still for 5 seconds
Incorrect response to the AS3X Control Direction Test	Incorrect direction settings in the receiver, which can cause a crash	DO NOT fly. Correct the direction settings (refer to the receiver manual), then fly

Troubleshooting Guide

Problem Possible Cause Solution
Aircraft will not respond to throttle but responds to other controls	Throttle not at idle and/or throttle trim too high	Reset controls with throttle stick and throttle trim at lowest setting
	Throttle servo travel is lower than 100%	Make sure throttle servo travel is 100% or greater
	Throttle channel is reversed	Reverse throttle channel on transmitter
	Motor disconnected from ESC	Make sure motor is connected to the ESC
Extra rotor noise or extra vibration	Damaged rotor and spinner, collet or motor	Replace damaged parts
	Rotor is out of balance	Balance or replace rotor
	Rotor screw is loose	Tighten the rotor screw
Reduced flight time or aircraft underpowered	Flight battery charge is low	Completely recharge flight battery
	Flight battery damaged	Replace flight battery and follow flight battery instructions
	Flight conditions may be too cold	Make sure battery is warm before use
	Battery capacity too low for flight conditions	Replace battery or use a larger capacity battery
Aircraft will not Bind (during binding) to transmitter	Transmitter too near aircraft during binding process	Move powered transmitter a few feet from aircraft, disconnect and reconnect flight battery to aircraft
	Aircraft or transmitter is too close to large metal object, wireless source or another transmitter	Move aircraft and transmitter to another location and attempt binding again
	The bind plug is not installed correctly in the bind port	Install bind plug in bind port and bind the aircraft to the transmitter
	Flight battery/transmitter battery charge is too low	Replace/recharge batteries
	Bind switch or button not held long enough during bind process	Power off transmitter and repeat bind process. Hold transmitter bind button or switch until receiver is bound
Aircraft will not connect (after binding) to transmitter	Transmitter too near aircraft during connecting process	Move powered transmitter a few feet from aircraft, disconnect and reconnect flight battery to aircraft
	Aircraft or transmitter is too close to large metal object, wireless source or another transmitter	Move aircraft and transmitter to another location and attempt connecting again
	Bind plug left installed in bind port	Rebind transmitter to the aircraft and remove the bind plug before cycling power
	Aircraft bound to different model memory (ModelMatchTM Transmitters only)	Select correct model memory on transmitter
	Flight battery/Transmitter battery charge is too low	Replace/recharge batteries
	Transmitter may have been bound to a different aircraft using different DSM protocol	Bind aircraft to transmitter
Control surface does not move	Control surface, control horn, linkage or servo damage	Replace or repair damaged parts and adjust controls
	Wire damaged or connections loose	Do a check of wires and connections, connect or replace as needed
	Transmitter is not bound correctly or the incorrect airplanes was selected	Re-bind or select correct airplanes in transmitter
	Flight battery charge is low	Fully recharge flight battery
	BEC (Battery Elimination Circuit) of the ESC is damaged	Replace ESC
Controls reversed	Transmitter settings are reversed	Perform the Control Direction Test and adjust the controls on transmitter appropriately
Motor power pulses then motor loses power	ESC uses default soft Low Voltage Cutoff (LVC)	Recharge flight battery or replace battery that is no longer performing
	Weather conditions might be too cold	Postpone flight until weather is warmer
	Battery is old, worn out, or damaged	Replace battery
	Battery C rating might be too small	Use recommended battery

Replacement Parts

Part Number	Description
EFL-1468	Wing: Viper 64mm EDF Jet
EFL-1469	Fuselage: Viper 64mm EDF Jet
EFL-1470	Horizontal Stabilizer: Viper 64mm EDF Jet
EFL-1471	Canopy/Hatch: Viper 64mm EDF Jet
EFL-1472	Nose Cone: Viper 64mm EDF Jet
EFL-1473	Winglet Set: Viper 64mm EDF Jet
EFL-1474	Pushrod Set: Viper 64mm EDF Jet
EFL-1475	Control Horn Set: Viper 64mm EDF Jet
EFL-1476	Wheel Set: Viper 64mm EDF Jet
EFL-1477	Screw Set: Viper 64mm EDF Jet
EFL-1478	Ventral Fin Set: Viper 64mm EDF Jet
EFL-1479	Decal Set: Viper 64mm EDF Jet
EFL-1480	Lighting Set: Viper 64mm EDF Jet

Part Number	Description
EFL-1481	Pilot: Viper 64mm EDF Jet
EFL-1482	Landing Gear Struts: Viper 64mm EDF Jet
EFL-1483	Servo Arm Set: Viper 64mm EDF Jet
EFL-1484	Wing Servo Covers: Viper 64mm EDF Jet
EFL9790	Ducted Fan Unit: 64mm 11 Blade EDF
EFL9792	Ducted Fan Rotor w/Hub: 64mm 11 Blade EDF
SPMXAM4300	Brushless Motor, 2840-3150Kv
SPMXAE70B	Avian 70-Amp Smart Lite Brushless ESC, 3S-6S: IC3
SPMSA334	A334 Sub-Micro Digital 9g Servo
SPMSA334R	A334R Sub-Micro Digital 9g Servo-Reversed
SPM-1031	AR631+ DSMX 6-Channel AS3X & SAFE Receiver

Recommended Parts

Part Number	Description
SPMR7100	NX7e 7CH DSMX Transmitter Only
SPMX224S50	14.8V 2200mAh 4S 50C Smart G2 LiPo Battery: IC3

Part Number	Description
SPMXC2020	Smart S1200 G2 AC Charger, 1x200W

Optional Parts

Part Number	Description
SPMR8200	NX8 8CH DSMX Transmitter Only
SPMX324S50	14.8V 3200mAh 4S 50C Smart LiPo G2: IC3
SPMX-1067	14.8V 2900mAh 4S 120C Smart LiPo Battery; IC3
SPMXBC100	XBC100 Smart LiPo Battery Checker & Servo Driver

Part Number	Description
SPMXC2040	S1400 G2 AC 1x400W Smart Charger
SPMXC2010	S2200 G2 AC 2x200W Smart Charger
BLH100	Deluxe Ball Link Pliers

Hardware List

Location Description Quantity
Wing Securing Screw	M3 x 10mm Hex Counter-Sunk Machine Screw	6
Stabilizer Securing Screw	M3 x 10mm Hex Counter-Sunk Machine Screw	3
Wing/Fuselage Hands-Free Connector Screws	M2 x 8mm Phillips Counter Sunk Self-Tapping Screws	4
Nose Gear Strut Securing Thumb Screw	M3 x 7mm Thumb Screw 1
Nose Gear Strut Bearing Securing Screw	M3 x 4mm Set Screw 1
Main Gear Strut Securing-Set Screw	M3 x 4mm Set Screw 4
Nose Gear Strut Securing-Set Screw	M3 x 4mm Set Screw 2
Landing Gear Strut Spring Retaining Screws	M3 x 6mm Phillips Machine Screw 6
Nose Gear Steering Servo Mounting Screws	M2 x 8mm Phillips Counter Sunk Self-Tapping Screws	2
Main Gear Axles 25.5 x 2.5mm Length x Diameter 2
Nose Gear Axle 20 x 2.5mm Length x Diameter 1
Axle Securing Set Screws M3 x 4mm Set Screw 3
Wheel Retaining E-Clips: Axle	2.5mm E-Clip 3

Location Description Quantity
Main Wheels -Rubber Tire - (Dia x Width x Axle)	49 x 18 x 2.5mm 2
Nose Wheel -Rubber Tire - (Dia x Width x Axle)	45 x 16 x 2.5mm 1
Ball Link (Ball Size) Ail/Flp/Ele/Rud	4mm Ball Joint 9
Ball Retaining Screws-Ail/ Flp/Ele/Rud Control Horn	M1.28 x 8mm Phillips Counter-Sunk Machine Screw	7
Elevator Servo Arm Ball Link Securing Screw	M2 x 12mm Phillips Machine Screw	1
Elevator Servo Arm Ball Link Securing Nut	M2 Hex Nut	1
Motor Securing Screws	M2.5 x 6mm Phillips Head Machine Screw	4
EDF Unit Securing Screws	M2.6 x 12mm Phillips Head Self-Tapping Screw	2
Rotor Adapter Securing Set Screw	M3 x 3mm Set Screw 1
Rotor Cone Securing Screw	M3 x 8mm Phillips Head Machine Screw	1
Aileron Hands-Free Connector Screw(s)	M2 x 8mm Phillips Head Self-Tapping Screw	4

Important Federal Aviation Administration (FAA) Information

Use the QR code below to learn more about the Recreational UAS Safety Test (TRUST), as was introduced by the 2018 FAA Reauthorization Bill. This free test is required by the FAA for all recreational flyers in the United States. The completed certificate must be presented upon request by any FAA or law enforcement official.

If your model aircraft weighs more than .55lbs or 250 grams, you are required by the FAA to register as a recreational flyer and apply your registration number to the outside of your aircraft. To learn more about registering with the FAA, use the QR code below.

According to FAA regulation, all unmanned aircraft over .55lbs (250 grams) flying in United States airspace are required to either fly within an FAA-Recognized Identification Area (FRIA) or continually transmit an FAA-registered remote identification from a Remote ID broadcast module, such as the Spektrum™ Sky™ Remote ID module (SPMA9500). Use the QR code to learn more about the FAA Remote ID regulations.

AMA National Model Aircraft Safety Code

Effective January 1, 2018

A model aircraft is a non-human-carrying device capable of sustained flight within visual line of sight of the pilot or spotter(s). It may not exceed limitations of this code and is intended exclusively for sport, recreation, education and/or competition. All model flights must be conducted in accordance with this safety code and related AMA guidelines, any additional rules specific to the flying site, as well as all applicable laws and regulations.

As an AMA member I agree:

• I will not fly a model aircraft in a careless or reckless manner.
• I will not interfere with and will yield the right of way to all human-carrying aircraft using AMA's See and Avoid Guidance and a spotter when appropriate.
• I will not operate any model aircraft while I am under the influence of alcohol or any drug that could adversely affect my ability to safely control the model.
• I will avoid flying directly over unprotected people, moving vehicles, and occupied structures.
• I will fly Free Flight (FF) and Control Line (CL) models in compliance with AMA's safety programming.
• I will maintain visual contact of an RC model aircraft without enhancement other than corrective lenses prescribed to me. When using an advanced

flight system, such as an autopilot, or flying First-Person View (FPV), I will comply with AMA's Advanced Flight System programming.

• I will only fly models weighing more than 55 pounds, including fuel, if certified through AMA's Large Model Airplane Program.
• I will only fly a turbine-powered model aircraft in compliance with AMA's Gas Turbine Program.
• I will not fly a powered model outdoors closer than 25 feet to any individual, except for myself or my helper(s) located at the flightline, unless I am taking off and landing, or as otherwise provided in AMA's Competition Regulation.
• I will use an established safety line to separate all model aircraft operations from spectators and bystanders.

Limited Warranty

What this Warranty Covers—Horizon Hobby, LLC, (Horizon) warrants to the original purchaser that the product purchased (the "Product") will be free from defects in materials and workmanship at the date of purchase.

What is Not Covered—This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or due to improper use, installation, operation or maintenance, (iii) modification of or to any part of the Product, (iv) attempted service by anyone other than a Horizon Hobby authorized service center, (v) Product not purchased from an authorized Horizon dealer, (vi) Product not compliant with applicable technical regulations, or (vii) use that violates any applicable laws, rules, or regulations.

OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON MAKES NO OTHER WARRANTY OR REPRESENTATION, AND HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER'S INTENDED USE.

Purchaser's Remedy—Horizon's sole obligation and purchaser's sole and exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE PURCHASER'S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability—HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use, setup, final assembly, modification or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the user accepts all resulting liability. If you as the purchaser or user are not prepared to accept the liability associated with the use of the Product, purchaser is advised to return the Product immediately in new and unused condition to the place of purchase.

Law—These terms are governed by Illinois law (without regard to conflict of law principals). This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Horizon reserves the right to change or modify this warranty at any time without notice.

WARRANTY SERVICES

Questions, Assistance, and Services—Your local hobby store and/or place of purchase cannot provide warranty support or service. Once assembly, setup or use of the Product has been started, you must contact your local distributor or Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance. For questions or assistance, please visit our website at www.horizonhobby.com, submit a Product Support Inquiry, or call the toll free telephone number referenced in the Warranty and Service Contact Information section to speak with a Product Support representative.

Inspection or Services—If this Product needs to be inspected or serviced and is compliant in the country you live and use the Product in, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA) number. Pack the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until it arrives and is accepted at our facility. An Online Service Request is available at http://www.horizonhobby.com/content/service-center_render-service-center. If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service. When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you can be reached during business hours. When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem. A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.

NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office.

Warranty Requirements—For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. Service or replacement decisions are at the sole discretion of Horizon.

Non-Warranty Service—Should your service not be covered by warranty, service will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for service you are agreeing to payment of the service without notification. Service estimates are available upon request. You must include this request with your item submitted for service. Non-warranty service estimates will be billed a minimum of 12 hour of labor. In addition you will be billed for return freight. Horizon accepts money orders and cashier's checks, as well as Visa, MasterCard, American Express, and Discover cards. By submitting any item to Horizon for service, you are agreeing to Horizon's Terms and Conditions found on our website http://www.horizonhobby.com/content/service-center_render-service-center.

ATTENTION: Horizon service is limited to Product compliant in the country of use and ownership. If received, a non-compliant Product will not be serviced. Further, the sender will be responsible for arranging return shipment of the un-serviced Product, through a carrier of the sender's choice and at the sender's expense. Horizon will hold non-compliant Product for a period of 60 days from notification, after which it will be discarded.

10/15

Contact Information

Country of Purchase Horizon Hobby Contact Information Address

United States of America	Horizon Service Center (Repairs and Repair Requests) servicecenter.horizonhobby.com/RequestForm/		2904 Research RdChampaign, Illinois, 61822 USA
	Horizon Product Support (Product Technical Assistance)	[e-mail]800-338-4639
	Sales	[e-mail]800-338-4639
European Union	Horizon Technischer Service [e-mail]		Hanskampring 9D 22885 Barsbüttel, Germany
	Sales: Horizon Hobby GmbH +49 (0) 4121	2655 100

FCC Information

Contains: FCC ID: BRWSPMSR6200A

Supplier's Declaration of Conformity

EFL Smart Viper 64mm EDF BNF-Basic (EFL07750) and EFL Smart

Viper 64mm EDF PNP (EFL07775)

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the ment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help.

Horizon Hobby, LLC

2904 Research Rd.,

Champaign, IL 61822

Email: [e-mail]

Web: HorizonHobby.com

IC Information

Contains: CAN ICES-3 (B)/NMB-3(B)

Contains: IC: 6157A-SPMSR6200A

This device contains license-exempt transmitter(s)/receivers(s) that comply with Innovation, Science, and Economic Development Canada's license-exempt RSS(s).

Operation is subject to the following 2 conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

Compliance Information for the European Union

EU Compliance Statement:

EFL Smart Viper 64mm EDF PNP (EFL07775): Hereby, Horizon

Hobby, LLC declares that the device is in compliance with the

following: EU EMC Directive 2014/30/EU. RoHS 2 Directive 2011/65/

EU, RoHS 3 Directive - Amending 2011/65/EU Annex II 2015/863

EFL Smart Viper 64mm EDF BNF-Basic (EFL07750) Hereby, Horizon Hobby, LLC declares that the device is in compliance with the following: EU Radio Equipment Directive 2014/53/EU, RoHS 2 Directive 2011/65/EU, RoHS 3 Directive - Amending 2011/65/EU Annex II 2015/863.

The full text of the EU declaration of conformity is available at the following internet address: https://www.horizonhobby.com/content/support-render-compliance.

Wireless Frequency Range and Wireless Output Power:

2404-2476MHz

5.58dBm

EU Manufacturer of Record:

Horizon Hobby, LLC

2904 Research Road

Champaign, IL 61822 USA

EU Importer of Record:

Horizon Hobby, GmbH

Hanskampring 9

22885 Barsbüttel Germany

WEEE NOTICE:

This appliance is labeled in accordance with European Directive 2012/19/EU concerning waste of electrical and electronic equipment (WEEE). This label indicates that this product should not be disposed of with household waste. It should be deposited at an appropriate facility to enable recovery and recycling.

© 2024 Horizon Hobby, LLC.

E-flite, AS3X, DSM, DSM2, DSMX, EC3, IC3, Avian, Spektrum Airware, Bind-N-Fly, BNF, the Bind-N-Fly logo, SAFE, the SAFE logo, ModelMatch, and the Horizon Hobby logo are trademarks or registered trademarks of Horizon Hobby, LLC. The Spektrum trademark is used with permission of Bachmann Industries, Inc. All other trademarks, service marks and logos are property of their respective owners. 8,672,726, 9,056,667, 9,930,567, 9,753,457, 10,078,329, 10,419,970. US 10,849,013. Other patents pending. www.horizonhobby.com