E-flite Viper 70mm EDF Instruction Manual

Important Information & Warnings

Note: All instructions, warranties, and related documents are subject to change at the discretion of Horizon Hobby, LLC. For the latest product literature, visit www.horizonhobby.com or www.towerhobbies.com in the product's Support section.

Term Explanation: The following terms are used throughout the product literature to indicate various levels of potential harm:

• WARNING: If these procedures are not followed correctly, it may result in property damage, collateral damage, and serious injury OR a high probability of superficial injury.
• CAUTION: If these procedures are not followed correctly, it may result in property damage AND the possibility of serious injury.
• NOTICE: If these procedures are not followed correctly, it may result in property damage AND little or no possibility of injury.

WARNING: Read the ENTIRE instruction manual to become familiar with the product's features before operating. If the product is not operated correctly, it can result in damage to the product or personal property and cause serious injury.

This is a sophisticated hobby product. It must be operated with caution and common sense and requires some mechanical aptitude. If this product is not operated in a safe and responsible manner, it can result in injury or damage to the product or other property. Do not attempt to disassemble, use with incompatible components, or modify the product in any way without the approval of Horizon Hobby, LLC. This instruction manual contains instructions for safety, operation, and maintenance. It is essential to read and follow all instructions and warnings in the manual before assembly, setup, or use, so that it can be operated as intended and to avoid damage or serious injury.

Not suitable 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 it in a manner that does not endanger yourself and others or result in damage to other property. The model is remotely controlled and susceptible to certain external influences. These influences can lead to a temporary loss of control, making it always advisable to maintain adequate safety clearance in all directions around the model.

• Never operate the model with a nearly empty or weak transmitter battery.
• Always operate your model in open areas, far from automobiles, traffic, and people.
• Do not operate your model on the street or in crowded places.
• Carefully observe all instructions and warnings for the model and all associated equipment.
• Keep all chemicals, small parts, and electrical components out of the reach of children.
• Never lick or put parts of your model in your mouth, as they could cause serious injury or death.
• Always be attentive when using tools or sharp instruments.
• Be careful during assembly, as some parts may have sharp edges.
• Do not touch the motor, speed controller, or battery immediately after operation, as these parts can become very hot and cause serious burns if touched.
• Do not reach into rotating or moving parts, as you could seriously injure yourself.
• Always turn on the transmitter first before turning on the receiver in the vehicle.
• Do not place the vehicle on its wheels when checking functions.

WARNING ABOUT COUNTERFEIT PRODUCTS: If you ever need to replace a Spektrum component, always purchase the required replacement parts from Horizon Hobby or an authorized Horizon Hobby dealer to ensure you receive the best Spektrum quality. Horizon Hobby, LLC disclaims any liability, warranty, and service for, but not limited to, compatibility and performance claims of counterfeit products or products that claim to be DSM or Spektrum compatible.

Specifications

Included Equipment

Recommended Equipment

Model Assembly

Mounting the Horizontal Stabilizer

1. Plug the two elevator servo connectors into the extensions marked "ELEV" in the fuselage. Route the excess servo wire into the fuselage, ensuring the servo connectors and excess wire are not visible when looking into the tail cone.

TIP: Pay attention to the correct polarity of the servo connectors: brown to brown, yellow to yellow, and orange to orange.

2. Press the horizontal stabilizer onto the fuselage, ensuring the alignment tab on the stabilizer fits into the recess in the fuselage and that the servo wires are not pinched.

3. Screw two flat-head screws (M3 x 16mm) through the horizontal stabilizer into the rear holes in the fuselage. Use a 2mm Allen wrench and do not overtighten the screws.

Mounting the Vertical Stabilizer

1. Connect the rudder servo connector to the extension in the fuselage marked "RUDD". Route the excess servo wire into the fuselage.

2. Press the vertical stabilizer into the slot in the horizontal stabilizer and fuselage, ensuring the wires are not pinched.

3. Screw three flat-head screws (M3 x 16mm) through the vertical stabilizer and into the fuselage. Do not overtighten the screws.

Model Assembly (Continued)

Mounting the Wing

1. Separate the extensions for the aileron, flap, and retract servos emerging from the wing. Ensure the servo connectors are properly connected to the Y-harness. The extensions are labeled "AIL", "FLAP", and "GEAR".

NOTICE: The Y-harness for the landing gear is pre-installed. The GEAR servo connectors will be installed after the wing is mounted.

3. Route the Y-harnesses from the aileron, flap, and retract servos through the opening in the fuselage bottom (as shown), carefully pulling the servo extension through the fuselage from the receiver/battery cover.

4. Slide the wing into position. Be careful not to pinch the servo wires.

5. Secure the wing to the fuselage with six flat-head screws (M3 x 16mm). Do not overtighten the screws.

6. Plug the wing's GEAR servo connectors into the receiver's Y-harness marked "GEAR".

7. Plug the AIL servo connector into the receiver's aileron port (CH2).

8. Plug the FLAP servo connector into the receiver's flap port (CH6).

Installing the Receiver

The recommended receiver for this aircraft is the Spektrum AR631. If installing a different receiver, ensure it is a full 6-channel receiver. Refer to the chosen receiver's manual for correct installation and operation.

Mounting the AR631

1. Slide the cover's locking tab backward and lift the rear of the cover to remove it.

2. Connect the appropriate control surfaces to their respective ports on the receiver as shown in the table on the right.

3. Secure the receiver in the battery bay using double-sided servo tape as far back as possible. The receiver should be mounted parallel to the length of the fuselage, with the label facing up as shown, and the servo ports facing the rear of the aircraft. Receiver orientation is critical for AS3X and SAFE configuration.

CAUTION: Incorrect receiver installation can cause a crash.

AR631 Port Assignments:

• 1 = Throttle
• 2 = Aileron
• 3 = Elevator
• 4 = Rudder/Nose Gear
• 5 = Retracts
• 6 = Flaps

Transmitter Setup

IMPORTANT: After setting up the model, always re-bind the transmitter and receiver to set the desired failsafe positions.

The gear channel (Channel 5) controls the retracts. If using a 6-channel transmitter, the flap channel can be used to activate SAFE Select. Based on the values listed below, SAFE will activate with the flap position set to mid and full down, and AS3X will be active with the flap position set to neutral.

To use the flap channel for the SAFE Select switch, the values must be set to +100 and -100, and the speed temporarily set to 0 to assign the SAFE switch in the flap system menu. Then, change the flap system values back according to the listing in the TX setup. More information on assigning a switch for SAFE Select is included in the "SAFE Select Switch Assignment" section of this manual.

For the maiden flight, set the flight timer to 3 minutes and 40 seconds. Adjust the duration after the maiden flight.

NX Series Transmitter Configuration

1. Turn on your transmitter, click the scroll wheel, navigate to System Setup, and click the scroll wheel. Select YES.
2. Go to Model Select and choose Add New Model. Select Aircraft Type by choosing the aircraft image, then select Create.
3. Set Model Name: Enter a name for your model file.
4. Go to Aircraft Type and scroll to Wing Type, select Wing: 1 Aileron 1 Flap Tail Type: Normal.
5. Select Main Screen, click the scroll wheel to access the Function List.
6. Navigate to the D/R (Dual Rate) and Expo menu to set D/R and Expo.
7. Dual Rates and Expo: Aileron
   • Set Switch: Switch F
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
8. Dual Rates and Expo: Elevator
   • Set Switch: Switch C
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
9. Dual Rates and Expo: Rudder
   • Set Switch: Switch G
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
10. Set Throttle Cut: Switch H, Position: -100%
11. Select Flaps System
    • Set Switch: Switch D
    • Set Flaps: POS 0: -100%, POS 1: -25%, POS 2: 55%
    • Set Elevator to Flap Mix: POS 0: 0%, POS 1: 11%, POS 2: 11%
    • Set Speed: 2.0

Dual Rates

Make your first flights at low speed. Use a large elevator throw for landing.

NOTICE: To ensure AS3X technology functions properly, do not reduce rates below 50%. If lower control throws are desired, manually adjust the linkage position on the servo arm.

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

Exponential

After the first flights, you can adjust the Expo value in your transmitter.

DX Series Transmitter Configuration

1. Turn on your transmitter, click the scroll wheel, navigate 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 will ask if you want to create a new model, select Create.
3. Set Model Type: Select Aircraft Model Type by choosing the aircraft. The system will prompt you to confirm the model type. Data will be reset. Select YES.
4. Set Model Name: Enter a name for your model file.
5. Go to Aircraft Type and scroll to Wing Type, select Wing: 1 Aileron 1 Flap Tail Type: Normal.
6. Select Main Screen, click the scroll wheel to access the Function List.
7. Set D/R (Dual Rate) and Expo: Aileron
   • Set Switch: Switch F
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
8. Set D/R (Dual Rate) and Expo: Elevator
   • Set Switch: Switch C
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
9. Dual Rates and Expo: Rudder
   • Set Switch: Switch G
   • Set High Rates: 100%, Expo 10%
   • Set Low Rates: 70%, Expo 5%
10. Set Throttle Cut: Switch H, Position: -100%
11. Select Flaps
    • Set Switch: Switch D
    • Set Flaps: POS 0: -100%, POS 1: -25%, POS 2: 55%
    • Set Elevator to Flap Mix: POS 0: 0%, POS 1: 11%, POS 2: 11%
    • Set Speed: 2.0

Transmitter Setup (Continued)

iX Series Transmitter Configuration

1. Turn on your transmitter and start the Spektrum AirWare app.
2. Select the orange pencil icon at the top left of the screen. The system will ask for permission to turn off RF; select CONTINUE.
3. Select the three dots in the upper right corner of the screen and choose Add New Model.
4. Go to Model Options, select DEFAULT, then select Aircraft. The system will ask if you want to create a new Acro model; select Create.
5. Select the last model in the list named Acro. Click on the word Acro and enter a new name for your file.
6. Press and hold the back arrow icon at the top left of the screen to return to the main screen.
7. Go to Model Settings. Select Aircraft Type. The system will ask for permission to turn off RF; select CONTINUE. Touch the screen to select a wing type. Select 1 Aileron 1 Flap.
8. Press and hold the back arrow icon at the top left of the screen to return to the main screen.
9. Go to the Adjust Model menu.
10. Set Dual Rates and Expo: Select Aileron
    • Set Switch: Switch F
    • Set High Rates: 100%, Expo 10%
    • Set Low Rates: 70%, Expo 5%
11. Set Dual Rates and Expo: Select Elevator
    • Set Switch: Switch C
    • Set High Rates: 100%, Expo 10%
    • Set Low Rates: 70%, Expo 5%
12. Set Dual Rates and Expo: Rudder
    • Set Switch: Switch G
    • Set High Rates: 100%, Expo 10%
    • Set Low Rates: 70%, Expo 5%
13. Set Flaps System
    • Set Switch: Switch D
    • Set Flaps: POS 0: -100%, POS 1: -25%, POS 2: 55%
    • Set Elevator to Flap Mix: POS 0: 0%, POS 1: 11%, POS 2: 11%
    • Set Speed: 2.0
14. Set Throttle Cut: Switch H, Position: -100%

General Tips for Binding and Failsafe

• The included transmitter is specifically programmed for operating this aircraft. If the receiver is replaced, refer to the receiver manual for proper setup instructions.
• Keep away from large metal objects during binding.
• Do not point the transmitter antenna directly at the receiver during binding.
• The red LED on the receiver will begin to blink rapidly when the receiver enters bind mode.
• After successful binding, the receiver retains its binding settings until a new bind occurs.
• If communication between the receiver and transmitter is interrupted, Failsafe will activate. Failsafe will set the throttle channel to a low throttle position. The elevator and aileron channels will move to stabilize the aircraft in a descending turn.
• If problems occur, consult the troubleshooting guide. Horizon product support can assist if needed.

Binding the Transmitter and Receiver / Enabling and Disabling SAFE Select

The BNF Basic version of this aircraft is equipped with SAFE Select technology, allowing you to choose the level of flight protection. SAFE mode includes angle limits and automatic self-leveling. AS3X mode allows the pilot direct response to the control sticks. SAFE Select is enabled or disabled during the binding process. If SAFE Select is disabled, the aircraft will always be in AS3X mode. If SAFE Select is enabled, the aircraft will always be in SAFE Select mode. Alternatively, a switch can be assigned to toggle between SAFE Select and AS3X modes.

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

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

IMPORTANT: Set the transmitter's flight controls (elevator, aileron, and rudder) and throttle trim to neutral. Set the throttle to low throttle before and during binding.

To complete the binding and SAFE Select process, you can use either the bind switch on the receiver case or the conventional bind plug. SAFE can also be enabled via forward programming.

Using the Bind Switch...

SAFE Select Enabled:

• Lower throttle
• Apply power
• Press and hold the bind switch
• Bind TX to RX
• Release bind switch

SAFE Select Enabled: Each time the receiver is powered on, the control surfaces will move back and forth twice with a short pause at the neutral position.

SAFE Select Disabled:

• Lower throttle
• Apply power
• Press and hold the bind switch
• Bind TX to RX
• Release bind switch

SAFE Select Disabled: Each time the receiver is powered on, the control surfaces will move back and forth once.

Using the Bind Plug...

SAFE Select Enabled:

• Lower throttle
• Apply power
• Install bind plug
• Bind TX to RX
• Remove bind plug

SAFE Select Enabled: Each time the receiver is powered on, the control surfaces will move back and forth twice with a short pause at the neutral position.

SAFE Select Disabled:

• Lower throttle
• Apply power
• Install bind plug
• Bind TX to RX
• Remove bind plug

SAFE Select Disabled: Each time the receiver is powered on, the control surfaces will move back and forth once.

Flying Tips with SAFE Select

When the aircraft is flying in SAFE Select mode, it will return to level flight when the aileron and elevator controls are at neutral. Using the aileron or elevator control can cause the aircraft to bank, climb, or dive. The intensity with which the control stick is moved determines the aircraft's attitude. Maintaining full control challenges the aircraft's preset bank and roll limits but does not cause it to exceed these angles.

When flying with SAFE Select, the control stick is normally held in the deflected position, with moderate input on the aileron for turns. To fly smoothly with SAFE Select, avoid frequent control inputs and minimize correction of minor deviations. With SAFE Select, deliberate control inputs command the aircraft to fly at a specific angle, and the model makes all adjustments to maintain that attitude.

Set the elevator and aileron controls to neutral, then switch from SAFE Select mode to AS3X mode. If the controls are not neutralized when switching to AS3X mode, the control inputs used for SAFE Select mode are too large for AS3X mode, and the aircraft will react immediately.

Differences Between SAFE and AS3X Modes

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

SAFE Select Switch Assignment

SAFE Select technology can be assigned to any available 2- or 3-position switch that controls a channel (5-9) on the transmitter. Once assigned to a switch, SAFE Select will have the flexibility to choose SAFE technology or AS3X mode during flight. If the aircraft was bound with SAFE Select disabled, it will remain exclusively in AS3X mode.

IMPORTANT: Before assigning the desired switch, ensure the travel for that channel is set to 100% in both directions, and that the aileron, elevator, rudder, and throttle all have 100% travel at high rates.

CAUTION: Keep all body parts away from the propeller and hold the aircraft securely if the throttle is accidentally applied.

TIP: SAFE Select can be assigned to any unused channel 5-9. Refer to your transmitter's manual for more information on assigning a switch to a channel.

TIP: Use the telemetry channel monitor to confirm that the four main channels have 100% travel when assigning the switch.

TIP: Use the telemetry channel monitor to ensure the switch intended for SAFE Select is active and moves a channel between 5-9, traveling 100% in each direction.

TIP: Ensure the four main channels are not reversed if you encounter problems assigning a SAFE Select switch.

Assigning a Switch

1. Bind the aircraft for the enabled SAFE Select option. This allows the system to be assigned to a switch.
2. Hold both transmitter sticks in the bottom inner corners and flip the desired switch 5 times (1 flip = fully from top to bottom) to assign that switch. The aircraft's control surfaces will move, indicating the switch has been selected.

If desired, repeat the process to assign a different switch or to disable the current switch.

Mode 1 and 2 Transmitter:

[Diagram showing sticks in bottom inner corners and switch being flipped 5 times]

Battery Mounting and ESC Activation

Battery Choice

A 22.2V 6S 3200mAh 50C LiPo battery with an IC5 connector is recommended. If using a different battery, it should be similar in power, dimensions, and weight to fit in the fuselage. Always ensure the model is balanced at the recommended CG with the chosen battery.

1. Set the throttle to the lowest position.
2. Turn on the transmitter and wait 5 seconds.
3. Apply the hook side (smooth side) of the hook-and-loop strap to the bottom of the battery.
4. Slide the cover's locking tab backward and lift the rear of the cover to remove it.
5. Insert the fully charged battery into the battery bay as shown in the illustration. Refer to 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 lead using the EC3 connector and ensure correct polarity. The ESC will emit two sets of tones in sequence to indicate its programming status.
   • The first set of tones indicates the number of cells in the connected LiPo battery pack. 6 quick tones = 6 cells.
   • The second set of tones indicates the brake status. One beep indicates the brake is "ON", and two beeps indicate the brake is "OFF".
8. NOTICE: Connecting the battery to the ESC with incorrect polarity will damage the ESC and void the warranty.

The ESC is now ready for use.*

9. Reinstall the canopy cover by sliding the cover's locking tab back onto the fuselage. Ensure the cover's tab snaps into place.

*While additional ESC programming is not required for aircraft operation, programming options are available. Full instructions for programming the included ESC can be found at www.horizonhobby.com.

Low Voltage Cutoff (LVC)

If a LiPo battery is discharged below 3 volts per cell, it can no longer hold a charge. The ESC protects the battery from undervoltage with Low Voltage Cutoff (LVC). Regardless of the throttle stick position, power will be reduced to prevent the cell voltage from dropping below 3 volts.

The motor will begin to pulse, indicating that there is still enough power for a safe landing. Please land immediately when the motor starts pulsing and recharge the battery.

Always disconnect the battery from the receiver and remove it from the aircraft after flying. Charge the battery to half capacity before storing it. Ensure the battery voltage does not drop below 3 volts per cell. If the battery is not disconnected, it will be deeply discharged.

For the first flights, set the stopwatch or timer on your remote control to 3 minutes. Adjust the timer longer or shorter after the first flight.

NOTICE: Repeatedly flying into LVC will damage the battery.

Center of Gravity (CG)

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

The CG position is 80-90mm behind the leading edge at the wing root. Always check the CG with the model inverted and the landing gear extended.

The CG position is adjusted by moving the battery pack forward or backward in the battery bay.

Horn and Servo Arm Settings

The table on the right shows the factory settings for the control horns and servo arms. Fly the aircraft with the factory settings before making any changes.

NOTICE: If the factory control throw settings are changed, the AR631 gain values may need to be adjusted. Refer to the Spektrum AR631 manual for adjusting gain values.

After flying, the linkage positions can be adjusted for desired control response. Refer to the following table.

Dual Rates and Control Throws

Program the transmitter to set rates and control throws according to your experience level. These values have been tested and are a good starting point for a successful maiden flight. After flying, the values can be adjusted for desired control response.

(p) = Push, (q) = Pull

Trimming During Flight

Trim the aircraft for level flight on your first flight. To improve straight-line flight, make small trim adjustments using your transmitter's trim switches.

After setting the trim, do not touch the control sticks for 3 seconds. This allows the receiver to receive the information needed to optimize AS3X performance. Failure to do so may affect flight performance.

[Diagram showing a 3-second countdown timer]

Control Direction Test

WARNING: Do not perform this or other equipment tests without the throttle safety function enabled. Unintended engine start could otherwise cause serious personal injury or property damage.

If the control surfaces do not react as shown, DO NOT FLY THE AIRCRAFT. Refer to the troubleshooting guide for more information. If you need further assistance, please contact the relevant department at Horizon Hobby Product Support.

1. Turn on the transmitter.
2. Activate the throttle safety function.
3. Connect the battery.
4. Use the transmitter to control the aileron, elevator, and rudder controls.

NOTICE: When checking control directions, view the aircraft from the rear.

Aileron

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

Elevator

3. Pull the elevator stick back. The elevators should move up, causing the aircraft to climb.
4. Push the elevator stick forward. The elevators should move down, causing the aircraft to dive.

Rudder

5. Move the rudder stick left. The rudder should move left.
6. Move the rudder stick right. The rudder should move right.

[Diagrams showing transmitter stick movements and corresponding control surface reactions for Aileron, Elevator, and Rudder]

Centering Controls

After mounting and setting up the transmitter, check that the control surfaces are centered. If the control surfaces are not centered, mechanically center them by adjusting the linkages.

If adjustment is needed, rotate the ball link on the linkage to change the length of the linkage between the servo arm and the control horn. After binding a transmitter to the aircraft receiver, set trims and sub-trims to 0, then adjust the ball links to center the control surfaces.

Power System Installation and Operation

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

Disassembly

The wing has been removed in the illustration for clarity. It is possible to access the power system components without removing the wing.

1. Remove the two screws (A) from the fan unit cover (B) and pull the cover out of the fuselage.
2. Remove the two screws (C) from the fan unit's tabs.
3. Pull the fan unit (D) out of the fuselage and disconnect the motor wires from the ESC.
4. Remove the spinner (E) from the fan unit by removing the screw from the motor shaft adapter.
5. Remove the nut and washer (F) to remove the fan unit (G) and motor shaft adapter (H).
6. Remove the four screws (I) to remove the motor from the fan shroud (J).
7. Carefully remove the plastic cover (K) of the ESC. The cover is glued to the fuselage.
8. Disconnect the throttle wires from the receiver and lift the ESC (L) out of the fuselage, paying attention to the routing of the power and throttle wires through the upper fuselage.

Assembly

Reassemble in reverse order.

• Connect the motor wire colors correctly to the ESC wires.
• Ensure the front of the rotor is aligned with the nose of the aircraft.
• A tool is required to tighten the nut on the rotor and the collet.
• Ensure no wire is pinched by the power system components.
• Ensure the ESC cover is securely glued to the fuselage.
• For safe operation, ensure the spinner is fully secured.

IMPORTANT: Allow aircraft components to cool down between flights.

After Flight

• Disconnect the flight battery from the ESC (required for safety and battery longevity).
• Turn off the transmitter.
• Remove the flight battery from the aircraft.
• Charge the aircraft battery to storage voltage.
• Repair or replace any damaged parts.
• Store the flight battery separately from the aircraft and monitor the battery charge level.
• Note the flight conditions and results for future flight planning.

AS3X Troubleshooting

Troubleshooting

Troubleshooting (Continued)

Replacement Parts

Recommended Parts

Optional Parts

Disclaimer

Warning: A remotely controlled model is not a toy. If used improperly, it can cause significant injury to living beings and damage to property. Operate your RC model only in open areas and observe all instructions in the model's and transmitter's instruction manuals.

Warranty Period: Exclusive Warranty Horizon Hobby LLC (Horizon) warrants that the purchased product will be free from material and workmanship defects. The warranty period corresponds to the legal provisions of the country in which the product was purchased. In Germany, the warranty period is 6 months and the warranty period is 18 months after the warranty period.

Warranty Limitations: (a) The warranty is granted only to the original purchaser (buyer) and is non-transferable. The buyer's claim consists of repair or replacement under this warranty. The warranty extends exclusively to products purchased from an authorized Horizon dealer. Third-party sales are not covered by this warranty. Warranty claims will only be accepted if valid proof of purchase is provided. Horizon reserves the right to change or modify these warranty terms without notice and to revoke existing warranty terms.

(b) Horizon makes no warranty regarding the product's marketability, capabilities, and fitness of the consumer for a specific intended use of the product. The buyer is solely responsible for verifying that the product meets their capabilities and intended use.

(c) Buyer's Claims: It is at Horizon's sole discretion whether the product, for which a warranty case has been identified, will be repaired or replaced. These are the buyer's exclusive claims if a defect is identified. Horizon reserves the right to inspect all components used that may be included in the warranty case. The decision to repair or replace rests solely with Horizon. The warranty excludes cosmetic defects or defects caused by force majeure, improper handling of the product, incorrect use of the product, commercial use, or modifications of any kind.

The warranty excludes damage caused by incorrect installation, improper handling, accidents, operation, service, or repair attempts not performed by Horizon. Also excluded are cases resulting from (vii) use that violates applicable laws, statutes, or regulations. Returns by the buyer directly to Horizon or one of its country representatives require written authorization.

Limitation of Damages: Horizon is not responsible for direct or indirect consequential damages, loss of income, or commercial losses that arise in any way in connection with the product, regardless of whether a claim is made under a contract, warranty, or guarantee. Furthermore, Horizon will not accept any claims from a warranty case that exceed the individual value of the product. Horizon has no influence on the installation, use, or maintenance of the product or any product combinations chosen by the buyer. Horizon makes no warranty and accepts no claims for resulting injuries or damages. By using and installing the product, the buyer accepts all listed warranty provisions without restriction or reservation.

If you, as the buyer, are not prepared to accept these provisions in connection with the use of the product, you are requested to return the product in unused condition in its original packaging to the seller.

Safety Instructions: This is a high-quality hobby product and not a toy. It must be used with caution and care and requires some mechanical as well as mental aptitude. Failure to operate the product safely and cautiously can lead to injuries to living beings and property damage of considerable extent. This product is not intended for use by children without the supervision of a guardian. The manual contains safety instructions and regulations as well as tips for maintenance and operation of the product. It is essential to read and understand these instructions before initial commissioning. Only in this way can improper handling be prevented and accidents with injuries and damages be avoided.

Questions, Help, and Repairs: Your local specialist dealer and sales point cannot carry out a warranty assessment without consulting Horizon. This also applies to warranty repairs. Therefore, in such cases, contact the dealer who will consult with Horizon to make an appropriate decision that helps you as quickly as possible.

Maintenance and Repair: If your product needs maintenance or repair, contact your specialist dealer or Horizon directly. Returns / Repairs will only be processed with an RMA number issued by Horizon. You or your specialist dealer will receive this number from technical service. More information can be found in the service portal at www.Horizonhobby.de or by calling Horizon technical service.

Pack the product carefully. Note that the original carton is usually not sufficient to prevent damage during shipping. Use a parcel service provider with a tracking function and insurance, as Horizon is not responsible for shipping until acceptance. Please include proof of purchase with the product, as well as a detailed description of the defect and a list of all individual components sent. We also require your full address, a phone number for inquiries, and an email address.

Warranty and Repairs: Warranty inquiries will only be processed if an original proof of purchase from an authorized dealer is enclosed, showing the buyer and the date of purchase. If a warranty case is confirmed, the product will be repaired or replaced. This decision rests solely with Horizon Hobby.

Paid Repairs: In the case of a paid repair, we will provide a cost estimate, which we will forward to your dealer. The repair will only be carried out once we receive approval from the dealer. The repair cost is to be paid to your dealer. For paid repairs, a minimum of 30 minutes of workshop time and return shipping costs will be charged. If we do not receive confirmation of acceptance for the repair within 90 days, we reserve the right to destroy or otherwise dispose of the product.

CAUTION: We only perform paid repairs for electronics and motors. Mechanical repairs, especially for helicopters and RC cars, are extremely complex and must therefore be carried out by the buyer themselves.

Warranty and Service Contact Information

EU Conformity Information

EU Declaration of Conformity

EFL Smart Viper 70mm EDF BNF-Basic (EFL077500): Horizon LLC hereby declares that this product is in conformity with the essential requirements of the RED and EMC Directive, RoHS 2 Directive 2011/65/EU, RoHS 3 Directive - Amendment 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/supportrender-compliance.

Wireless Frequency Range and Wireless Output Power: 2404-2476MHz 5.58dBm

Registered EU Manufacturer:

Horizon Hobby, LLC
2904 Research Road
Champaign, IL 61822 USA

Registered EU Importer:

Horizon Hobby, GmbH
Hanskampring 9
22885 Barsbüttel Germany

WEEE NOTICE:

This equipment is marked in accordance with European Directive 2012/19/EU on waste electrical and electronic equipment (WEEE). This symbol indicates that this product is not normal household waste but must be disposed of at a designated collection point for waste electrical and electronic equipment.