Horizon Hobby E-flite Twin Timber User manual

Twin Timber 1.6m
Instruction Manual
Bedienungsanleitung
Manuel d’utilisation
Manuale di Istruzioni
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EFL23875EFL23850
Created 12/22

EN
2Twin Timber 1.6m
Safety Precautions and Warnings
NOTICE
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.
AGE RECOMMENDATION: Not for children under 14 years. This is not a toy.
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.
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
warranty 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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3
Table of Contents
Required Tools.......................................................................................................3
Transmitter Setup ..................................................................................................4
Aircraft Assembly...................................................................................................5
Battery Installation and ESC Arming.......................................................................9
Center of Gravity (CG) ...........................................................................................9
General Binding Tips and Failsafe BNF ................................................................10
Transmitter and Receiver Binding / Enabling and Disabling SAFE Select BNF .......10
Integrated ESC Telemetry.....................................................................................11
SAFE®Select Switch Designation BNF ................................................................11
Control Surface Centering ...................................................................................12
Control Surface Direction.....................................................................................12
Dual Rates and Control Throws............................................................................13
In Flight Trimming BNF ........................................................................................13
Differential Thrust................................................................................................13
Flying Tips and Repairs........................................................................................13
Post Flight............................................................................................................14
SAFE Select Flying Tips BNF ................................................................................14
Receiver Selection and Installation PNP ..............................................................14
Control Horn and Servo Arm Settings...................................................................15
Motor Service ......................................................................................................15
Float Installation (Optional) ..................................................................................16
Flying Off Water ...................................................................................................17
Thrust Reversing (Optional) .................................................................................17
Troubleshooting Guide AS3X BNF ........................................................................18
Troubleshooting Guide .........................................................................................18
Replacement Parts...............................................................................................19
Important Federal Aviation Administration (FAA) Information.................................19
Recommended Items...........................................................................................19
Optional Items .....................................................................................................19
AMA National Model Aircraft Safety Code.............................................................20
Limited Warranty .................................................................................................20
Contact Information .............................................................................................21
FCC Information...................................................................................................21
IC Information......................................................................................................21
Compliance Information for the European Union...................................................21
Registration
Register your product today to join our mailing list and keep
up to date with product updates, offers and E-flite®news.
Required Tools
• Phillips Screwdrivers
(PH#0, PH#1)
• 2mm Hex Driver
• 10mm or Adjustable Wrench
Included Equipment
Receiver Spektrum™AR637TA 6CH SAFE®and AS3X®Telemetry Receiver
(SPMAR637TA)
ESC Avian Dual 40-Amp Smart Lite ESC (SPMXAE0240B)
Motors 3536-750KV Brushless Motor, 14-Pole (SPMXAM0750)
Propellers 3-Blade Propeller, 10x7CW, 10x7CCW (EFLP10073B, EFLP10073BCC)
Servos A332 9g Sub-Micro Metal-Geared Servo (SPMSA332)
Recommended Equipment
Transmitter NX6 6 Ch DSMX Transmitter Only (SPMR6775)
Flight Battery 3200mAh 4S 14.8V Smart G2 50C LiPo Battery: IC3 (SPMX324S50)
Battery Charger Smart S1100 G2 AC Charger, 1x100W (SPMXC2080)
Specifications
Wingspan 63.58in (1615mm)
Length 43.0in (1092mm)
Weight Without Battery: 79.65oz (2258g)
With Recommended 4S 3200mAh Flight Battery: 91.29oz (2588g)
Optional Accessories
EFL5261 Float Set:Timber
SPMXCA200 Avian Firma Smart ESC Programmer
SPMR8200 NX8 8 Ch DSMX Transmitter Only
SPMXC2010 Smart S2200 G2 AC Charger,2x200W
SPMX27004S30 2700mAh 4S 14.8V Smart 30C LiPo Battery; IC3
SPMX32004S100 3200mAh 4S 14.8V Smart 100C LiPo Battery; IC3
SPMX32004S30 3200mAh 4S 14.8V Smart 30C LiPo Battery; IC3
SPMX324S100 3200mAh 4S 14.8V Smart G2 100C LiPo Battery; IC3
SPMX40004S30 4000mAh 4S 14.8V Smart 30C LiPo Battery; IC3

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4Twin Timber 1.6m
Transmitter Setup
†Some of the terminology and function locations used in the iX series programming may be
slightly different than other Spektrum™AirWare™radios. The names given in parenthesis
correspond to the iX series programming terminology. Consult your transmitter manual for
specific information about programming your transmitter.
‡The settings provided above for the DX6 and DX6e do not allow for the use of a SAFE®Select
switch. To use a SAFE Select switch on these systems see the SAFE Select Switch Designation
section for transmitter setup and operation information.
IMPORTANT: After you set up your model, always rebind the transmitter and
receiver to set the desired failsafe positions.
IMPORTANT: Flap to elevator mix values, control throws, dual rates, exponential,
CG range are recommended as STARTING POINTS and should be adjusted for
personal preference as/if needed after making initial flights.
If your transmitter allows it, enable the throttle cut feature. Always engage throttle
cut before approaching the aircraft.
Dual Rates
Low rate is recommended for the initial flights.
NOTICE: To ensure AS3X®technology functions properly, do not lower rate
values below 50%. If lower rates are 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.
Transmitter Telemetry Setup
If the transmitter that you intend to use with this aircraft is not displaying telemetry
data, visit Spektrumrc.com and update your firmware. With the latest firmware
installed on your transmitter the telemetry option should now be functional on your
transmitter.
Computerized Transmitter Setup
(DX6e‡, DX6‡, DX7, DX7S, DX8, DX8e, DX9, DX10t,
DX18, DX20, iX12, iX14, iX20, NX6, NX8, and NX10)
Start all transmitter programming with a blank ACRO model (do a model reset),
then name the model.
Set Aileron, Elevator and
Rudder Dual Rates to:
HIGH 100% Expo 10%
LOW 70% Expo 5%
Set Servo Travel to: 100%
Set Throttle Cut to -130%
DX7S
DX8
1. Go to the SYSTEM SETUP
2. Set MODEL TYPE: AIRPLANE
3. Set AIRCRAFT TYPE: 1 AIL 1 FLAP
4. Go to the FUNCTION LIST
5. Set FLAP SYSTEM: Choose Flap
NORM: 0% FLAP 0% Elevator
MID: -50% FLAP 5% Elevator
LAND: -100% FLAP 6% Elevator
SPEED 2.0S: SWITCH = FLAP
DX6e‡
DX6 (Gen2)‡
DX7 (Gen2)
DX8 (Gen2)
DX8e
DX9
DX10t
DX18
DX20
iX12†
iX14†
iX20†
NX6
NX8
NX10
1. Go to the SYSTEM SETUP (Model Utilities)†
2. Set MODEL TYPE: AIRPLANE
3. Set AIRCRAFT TYPE (Model Setup, Aircraft Type)†:
WING: 1 AIL 1 FLAP
4. Go to the FUNCTION LIST (Model Adjust)†
5. Set FLAP SYSTEM:
SELECT SWITCH D:
POS 0: 0% FLAP 0% Elevator
POS 1: -50% FLAP 5% Elevator
POS 2: -100% FLAP 6% Elevator
SPEED 2.0

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5
Aircraft Assembly
Landing Gear Installation
1. Insert the left landing gear assembly into the pocket on the side of the fuselage
as shown. The landing gear legs mount to the flat spot of the aluminum block
which can pivot in the pocket.
2. Use a #1 Phillips screwdriver to install two M2.5 x 8mm machine screws through
the landing gear leg into the threaded holes in the aluminum pivot block.
3. The landing gear springs mount to the plastic bracket in the fuselage between
the landing gear legs. Align the looped end of the spring with the mounting hole
in the fuselage.
4. Use a #1 Phillips screwdriver to install a M3 x 16mm self tapping screw and
10mm stepped washer to anchor the landing gear spring in place.
5. Repeat steps 1 thru 4 to install the right landing gear assembly.

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6Twin Timber 1.6m
Horizontal Stabilizer Installation
1. Slide the 4mm x 300mm (0.60mm wall) horizontal stabilizer tube through the
hole in the rear of the fuselage, approximately centering the tube side to side.
TIP: Flex the elevators up and down several times to loosen the hinge.
2. Install the left and right horizontal stabilizers onto the tube and into the pocket
in the fuselage. Ensure the control horn on the right elevator is facing toward
the bottom of the aircraft, and the elevator torque tube aligns correctly. The
right side of the torque tube slips into the left side, ensuring the elevator halves
move in unison.
Pushrod Keeper Installation
1. Insert the end of the elevator pushrod with the 90° bend in the middle hole of
the elevator control horn and into the hole of the pushrod keeper.
2. Rotate the pushrod keeper and press until it clicks into position around the
pushrod, capturing the pushrod in the control horn.
3. Using a PH#1 Phillips screwdriver, secure the horizontal stabilizer halves in
place using two M2.5 x 12mm self tapping screws.

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7
Wing Assembly
The wing may be assembled with or without the included optional leading edge
slats. The slats improve the slow speed performance of the Twin Timber but have
minimal effect on the high speed performance.
Assembling the Optional Leading Edge Slats
1. Carefully apply medium CA to each slat pocket.
2. Mount the slat onto the wing with the rounded edge facing forward.
Propeller Adapter and Propeller Installation
The Twin Timber uses counter-rotating propellers. The propeller adapters are
threaded in opposite directions and are color-coded to ensure they are installed on
the correct motor.
• The red anodized propeller adapter is threaded normally and must be installed
on the left motor.
• The green anodized propeller adapter is reverse-threaded and must be installed
on the right motor.
1. Install each propeller adapter with a 2mm hex driver and four M2.5 x 10mm
hex head cap screws, ensuring the adapters are installed on the correct side,
as described above.
2. Using a 10mm wrench, prop washer, and 10mm nut, install the propellers onto
the propeller adapters, with the embossed size on the propeller hub facing
forward.
• The propeller marked CW must be installed on the left side (red anodized adapter).
IMPORTANT: The red anodized adapter is conventionally threaded and
requires the standard threaded nut. The standard threaded propeller nut
tightens in a clockwise direction. If the nut does not thread on easily, try the
other propeller nut.
• The propeller marked CCW must be installed on the right side (green
anodized adapter).
IMPORTANT: The green anodized adapter is reverse threaded and must
use the reverse threaded nut. The reverse threaded propeller nut tightens
in a counter-clockwise direction. If the nut does not thread on easily, try the
other propeller nut.
3. Using a PH#1 Phillips screwdriver and an M2.5 x 8mm machine screw, install
the spinner onto the propeller adapter. Use the illustration to determine which
spinner to install on each motor.
Left Side Spinner Right Side Spinner

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8Twin Timber 1.6m
3. Insert the motor wire connectors in the sockets in the fuselage.
IMPORTANT: The motor wires and sockets are color-coded red and green;
red on the left, green on the right. The motor wires must be connected to the
matching socket.
4. Insert the connectors from the wing servos into the sockets in the fuselage.
IMPORTANT: The servo wire connectors and sockets are color-coded red and
green; red on the left, green on the right. The servo wires must be connected to
the matching socket.
5. Insert the leading edge of the wing into the wing saddle, and then tighten the
two M6 x 30mm nylon wing screws to secure the wing in place.
CAUTION: DO NOT crush or otherwise damage the wiring when attaching
the wing to the fuselage.
Wing Installation
1. Insert the 12.8mm x 500mm (2.5mm wall) wing joiner tube and slide the left and
right wing halves together, as shown.
2. Secure the wing together using the wing bracket.
TIP: If it is necessary to remove the wing from the aircraft during transportation or
storage, you can seperate the wing panels and store the wing tube in the storage
clip between the motor connectors inside the fuselage. When inserting the wing
tube in the clip, be careful not to damage any wiring within the fuselage.
Servo connectors
Motor connectors
Green
Green
Green
Green
Red
Red
Red
Red

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9
Center of Gravity (CG)
Battery Installation and ESC Arming
The E-flite®Twin Timber is compatible with a range of LiPo batteries, from 3S
11.1V or 4S 14.8V, and 2200-5000mAh, with an EC3™or IC3®connector.
The optimum range is a LiPo battery of 3S or 4S and 3200-4000mAh.
IMPORTANT: When using smaller 2200mAh batteries it is critical to check the
center of gravity before attempting flight, as well as to monitor the current draw.
Additional nose weight may be required to achieve the correct center of gravity.
Depending on the condition of the battery, it may be necessary to adjust your
flying style to achieve adequate performance.
For best performance and overall handling, the Spektrum™Smart 3200mAh 4S
50C Li-Po battery (SPMX324S50) is recommended.
Refer to the Optional Parts List for other recommended batteries. If using a
battery other than those listed, the battery should be within the range of capacity,
dimensions and weight of the Spektrum Li-Po battery pack to fit in the fuselage.
Be sure the model balances at the recommended CG before flying.
WARNING: Always keep hands away from the propellers. When armed, the
motor will turn the propellers in response to any throttle movement. If your
transmitter supports it, always engage throttle cut before approaching the aircraft
any time a battery is connected.
1. Lower the throttle and throttle trim to the lowest settings. Power on the
transmitter, then wait 5 seconds.
2. Lift up on the rear of the hatch up to remove the hatch from the fuselage.
3. Install the fully charged battery in the battery compartment, as shown. Secure
using the two included hook and loop straps.
4. Connect the battery to the ESCs.
5. Keep the aircraft immobile and away from wind or the system will not initialize.
IMPORTANT: The aircraft must be bound to your transmitter to complete
initialization. If you have not completed the binding procedure, see the
Transmitter and Receiver Binding section.
• The ESCs will sound a series of tones (the ESCs are now armed).
• An LED will light on the receiver.
IMPORTANT: If the ESCs sound a continuous double beep after the flight
battery is connected, recharge or replace the battery.
6. Reinstall the canopy hatch.
The CG location is measured from the leading edge of the wing (without slats
installed) The recommended CG is 92mm (+/- 7mm) back from the leading edge.
TIP: Measure the CG at the furthest forward point of the wing leading edge,
between the fuselage and motor nacelles, as shown by the arrow in the illustration.
NOTICE: Install the battery and hatch but do not arm the ESC while checking the
center of gravity. Personal injury may result.
92mm (+/- 7mm) behind the leading edge of the wing

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10 Twin Timber 1.6m
To Enable SAFE Select To Enable SAFE Select
To Disable SAFE Select To Disable SAFE Select
Using The Bind Button... Using The Bind Plug...
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.
SAFE SELECT DISABLED: The control surfaces cycle back and forth once
every time the receiver is powered on.
SAFE SELECT DISABLED: The control surfaces cycle back and forth once
every time the receiver is powered on.
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.
Press and hold Bind Button
Press and hold Bind Button
Release Bind ButtonOrange Flashing LED
Connect PowerLower Throttle
Bind TX to RX
Bind TX to RX
Lower Throttle Connect Power
Release Bind Button
Orange Flashing LED
Install Bind Plug
Remove Bind Plug
Connect Power
Bind TX to RX
Lower Throttle
Install Bind Plug
Remove Bind Plug
Lower Throttle Connect Power
Bind TX to RXOrange Flashing LED
Orange Flashing LED
BIND
BIND
General Binding Tips and Failsafe BNF
Transmitter and Receiver Binding / Enabling and Disabling SAFE Select BNF
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.
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 the conventional bind plug to complete the binding and SAFE Select process.
TIP: An extension is installed in the receiver bind port, extending into the battery compartment. Insert the bind plug in the extension labeled “BIND” in the battery
compartment if using the bind plug to complete the binding and SAFE Select process.
• 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 orange 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.
SAFE Select can also be activated via Forward Programming in compatible transmitters.
BIND
BIND
TIP: An extension is installed in the receiver bind port, extending into the battery compartment. Insert the bind plug in the extension labeled “BIND” in the battery
compartment if using the bind plug to complete the binding and SAFE Select process.v