Horizon Hobby E-flite EFL08250 User manual

T-28 1.1m BNF Basic and PNP
Instruction Manual
Bedienungsanleitung
Manuel d’utilisation
Manuale di Istruzioni

EN
T-28 Trojan 1.1m
2
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.

EN
3
Box Contents
Table of Contents
Specifications
Motor: 3226-930Kv 14-Pole Brushless Motor
(SPMXAM1700) Installed Installed
ESCs: 30A Telemetry ESC (EFLA1030FB) Installed Installed
Servos: Aileron (2): A381, 400mm Lead
Elevator: A382, 240mm Lead
Rudder: A382, 240mm Lead Installed Installed
Receiver: Spektrum™AR631 6-Channel Sport Receiver
(SPMAR631) Installed Required
Recommended Battery: 11.1V 3S – 14.8V 4S
2200mAh 30C Li-Po with EC3 or IC3 connector
(SPMX22003S30, SPMX22004S30) Required Required
Recommended Battery Charger: 3 – 4cell Li-Po battery
balancing charger Required Required
Recommended Transmitter: Full range 6-channel
2.4GHz with Spektrum DSMX®technology with
adjustable Dual Rates. Required Required
SAFE®Select Technology (BNF Basic)...................................................... 4
Preflight................................................................................................... 4
Model Assembly ...................................................................................... 4
Transmitter Setup (BNF Basic)................................................................. 7
PNP Receiver Selection and Installation ................................................... 7
Battery Installation and ESC Arming......................................................... 8
Center of Gravity ..................................................................................... 8
Binding / Enabling and Disabling SAFE Select .......................................... 9
SAFE®Select Switch Designation........................................................... 10
Integrated ESC Telemetry....................................................................... 10
Control Surface Centering...................................................................... 10
Control Surface Direction....................................................................... 11
Control Horn and Servo Arm Settings..................................................... 11
AS3X Control Response Test (BNF Basic)............................................... 12
In Flight Trimming (BNF Basic)............................................................... 12
Dual Rates and Control Throws.............................................................. 12
Flying Tips and Repairs.......................................................................... 13
SAFE Select Flying Tips (BNF Basic)....................................................... 13
Post Flight ............................................................................................. 13
Motor Service ........................................................................................ 14
Nose Gear Service ................................................................................. 14
Servo Service ........................................................................................ 15
Troubleshooting Guide AS3X (BNF Basic)............................................... 15
Troubleshooting Guide ........................................................................... 16
Replacement Parts................................................................................. 17
Recommended Receiver (PNP)............................................................... 17
AMA National Model Aircraft Safety Code............................................... 17
Optional Parts........................................................................................ 17
Limited Warranty ................................................................................... 18
Contact Information ............................................................................... 18
FCC Information..................................................................................... 19
IC Information........................................................................................ 19
Compliance Information for the European Union..................................... 19
Recommended Receivers ...................................................................... 64
Replacement Parts................................................................................. 66
Optional Parts........................................................................................ 66
If you own this product, you may be required to register with the FAA.
For up-to-date information on how to register with the FAA, please visit
https://registermyuas.faa.gov/.
For additional assistance on regulations and guidance on UAS usage,
visit knowbeforeyoufly.org/.
Quick Start Information
Transmitter Setup Set up your transmitter
using the transmitter setup chart
Dual Rates*
High Rate Low Rate
Aileron p= 14mm
q= 14mm
p= 10mm
q= 10mm
Elevator p= 8mm
q= 8mm
p= 6mm
q= 6mm
Rudder = 19mm
= 19mm
= 13mm
= 13mm
Center of Gravity (CG) 67 – 72mm behind the leading edge
of the wing at the fuselage
Flight Timer Setting 5 minutes
30 oz / 855 g (without battery)
38 oz / 1080 g (with 2200mAh 4S 30C Smart battery)
36 in (915mm)
44 in (1120mm)
314.0 Sq In
(20.3 Sq Dm)

EN
T-28 Trojan 1.1m
4
Preflight
SAFE®Select Technology (BNF Basic)
The BNF Basic version of this airplane includes SAFE Select technology which can
offer an extra level of protection in flight. Use the following instructions to make the
SAFE Select system active and assign it to a switch. When enabled, SAFE Select
prevents the airplane from banking or pitching past predetermined limits, and
automatic self-leveling keeps the airplane flying in a straight and level attitude when
the aileron, elevator and rudder sticks are at neutral.
SAFE Select is enabled or disabled during the bind process. When the airplane is
bound with SAFE Select enabled, a switch can be assigned to toggle between SAFE
Select mode and AS3X mode. AS3X®technology remains active with no bank angle
limits or self leveling any time SAFE Select is disabled or OFF.
SAFE Select can be configured three ways;
• SAFE Select Off: Always in AS3X mode
• SAFE Select On with no switch assigned: Always in SAFE Select mode
• SAFE Select On with a switch assigned: Switch toggles between SAFE Select
mode and AS3X mode
1. Remove and inspect contents.
2. Read this instruction manual thoroughly.
3. Charge the flight battery.
4. Setup Transmitter using transmitter setup chart.
5. Fully assemble the airplane.
6. Install the flight battery in the aircraft (once it has been fully charged).
7. Check the Center of Gravity (CG).
8. Bind the aircraft to your transmitter.
9. Make sure linkages move freely.
10. Perform the Control Direction Test with the transmitter.
11. Perform the AS3X Control Direction Test with the aircraft.
12. Adjust flight controls and transmitter.
13. Perform a radio system Range Test.
14. Find a safe open area to fly.
15. Plan flight for flying field conditions.
Model Assembly
Wing Installation
1. Remove the canopy from the fuselage.
2. Turn the wing and fuselage so their bottom sides face up.
3. Place the wing’s aileron servo connectors (A) into the rectangular hole in the
fuselage.
4. Slide the two guide pins (B) of the wing into the two holes in the fuselage.
5. Align and attach the wing to the fuselage using the included M3 x 25mm(C)
screw using a Phillips screwdriver (not included).
6. Inside the fuselage, connect both aileron servo connectors to the aileron
Y-harness. There is no difference between the two connections on a
Y-harness. Left and right servo connectors do not have to be connected to a
particular side of a Y-harness.
7. When needed, disassemble in reverse order.
CAUTION: DO NOT crush or otherwise damage wiring when attaching the
wing to the fuselage.
M3 X 25mm
C
B A

EN
5
Model Assembly
Landing Gear Installation
1. Turn the model so the bottom of the wing faces up.
2. Install the main landing gear by inserting the main gear struts (A) into the
corresponding gear plate hole located on each wing.
3. Carefully turn each strut in the gear plate until the horizontal section (B) of the
strut gently snaps into place.
4. Loosen the nose gear screw (C) in the nose gear arm before installing the
nose gear strut (D). The screw may be fully installed at the factory, so loosen
the screw enough to ensure the screw does not block the strut. A hole in the
cowling allows a screwdriver to be used to turn the screw on the nose gear arm
using a #2 Phillips screw driver that is at least 6”(155mm) long (not included).
If more maneuvering space is needed, remove the propeller and cowling from
the model before installing the nose gear (as shown in the “Motor Service”
section of this manual).
5. Install the nose gear strut so the flat surface of the strut faces forward. The coil
in the nose gear strut should face the rear of the airplane. Fully insert the nose
gear strut into the nose gear arm. When inserted, the top of the strut will touch
the upper portion of the firewall.
6. Fully tighten the nose gear screw against the flat surface of the nose gear strut.
7. When needed, disassemble in reverse order.
Always ensure the steering linkage clevis on the rudder servo arm is correctly
adjusted so the model steers straight when the rudder control is at neutral.
A
D
C
B
Stabilizer Installation
1. Place the model on its landing gear.
2. Turn the horizontal stabilizer so the control horn faces down.
3. Slide the horizontal stabilizer in the mount from the right hand side until it is
centered and perpendicular to the fuselage.
4. Apply 4 pieces of tape (A) on the fuselage mounts and the top and bottom of
the horizontal stabilizer.
5. Attach the clevis to the elevator control horn (see instructions for
clevis connection).
6. When needed, disassemble in reverse order.
A

EN
T-28 Trojan 1.1m
6
Model Assembly
Connect the clevises to the control horns as shown
1.
2.
3.
4.
The illustration shows recommended hole settings in the servo arms
and control horns.
Control Horn and Servo Arm Settings
Horns Arms
Elevator
Ailerons
Rudder
Nose Gear
Nose
gear

EN
7
Transmitter Setup (BNF Basic)
IMPORTANT: After you set up your model, always rebind the transmitter and
receiver to set the desired failsafe positions.
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 (Expo)
After first flights, you may adjust expo in your transmitter.
†Some of the terminology and function locations used in the iX12 and iX20
programming may be slightly different than other Spektrum AirWare™radios.
The names given in parenthesis correspond to the iX12 and iX20 programming
terminology. Consult your transmitter manual for specific information about
programming your transmitter.
Computerized Transmitter Setup
Start all transmitter programming with a blank ACRO model (perform a model reset),
then name the model.
Set Dual Rates to HIGH 100% LOW 70%
Set Servo Travel to 100%
Set Throttle Cut to -100%
Set Retract Channel to Reverse
Set Aileron Expo to High Rate 15% Low Rate 5%
Set Elevator Expo to High Rate 10% Low Rate 5%
Set Rudder Expo to High Rate 10% Low Rate 5%
DXe Refer to spektrumrc.com for the appropriate download setup.
DX7S
DX8
1. Go to the SYSTEM SETUP
2. Set MODEL TYPE: AIRPLANE
3. Set WING TYPE: 1 AIL
DX6e
DX6 (Gen2)
DX7 (Gen2)
DX8e
DX8 (Gen2)
DX9
DX10t
DX18
DX20
iX12
iX20
1. Go to the SYSTEM SETUP (Model Utilities)†
2. Set MODEL TYPE: AIRPLANE
3. Set AIRCRAFT TYPE (Model Setup, Aircraft Type)†:
WING: 1 AIL
PNP Receiver Selection and Installation
The recommended receiver for this aircraft is the Spektrum AR631.
If you choose to install a different receiver, it needs to be a 4-channel or more
full range (sport) receiver. Refer to the manual of your chosen receiver for correct
installation and operation instructions.
AR631 Installation
1. Remove the hatch on the top of the fuselage.
2. Attach the appropriate control surfaces to their respective ports on the
receiver using the table at the right.
3. Using double-sided servo tape, mount the receiver to the flat area behind the
ESC, as shown. The receiver should be mounted in the orientation shown,
parallel to the length of the fuselage, with the label facing up and the servo
ports facing the rear of the aircraft. The orientation of the receiver is critical for
all AS3X®and SAFE®technology setups.
CAUTION: Incorrect installation of the receiver could cause a crash.
AR631 Port
Assignments
BND/PRG = BIND
1 = Throttle
2 = Aileron
3 = Elevator
4 = Rudder
5 = NA
6 = NA
Antenna Installation
The AR631 receiver has a coaxial style antenna. We recommend installing the antenna
as far as possible from metal, batteries, or carbon ber to maximize signal reception
performance.
NOTICE: Do not cut, kink, or modify the antennas. Damage to the coaxial portion
of an antenna will reduce the performance of the antenna. Shortening or cutting off
the 31mm tip will reduce the range.
Active portion
of antenna

WARNING: Install the battery but do not connect it to the ESC while
checking the CG. Personal injury may result.
The CG location is 67 – 72mm back from the leading edge of the wing at the
fuselage. Check the CG with the aircraft inverted.
The CG location is adjusted by moving the battery pack forward or backward in the
battery compartment.
EN
T-28 Trojan 1.1m
8
Center of Gravity
Battery Installation and ESC Arming
Battery Selection
We recommend the Spektrum 2200mAh 14.8V 4S 30C Smart Li-Po battery
(SPMX22004S30). 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
packs to fit in the fuselage. Be sure the model balances at the recommended CG.
1. Apply the loop side (soft side) of the hook and loop tape (A) to the bottom of
your battery.
2. Lower the throttle and throttle trim to the lowest settings. Power on the
transmitter, then wait 5 seconds.
3.Carefully lift the back of the canopy hatch (B) to remove.
4. Install the fully charged battery (C) in the battery compartment as shown.
See the Adjusting the Center of Gravity instructions for more information.
5. Make sure the flight battery is secured using the hook and loop strap.
6.Connect the battery to the ESC (the ESC is now armed).
• The ESC will sound tones corresponding to the battery cell count (refer to
step 6 of the binding instructions for more information).
• An LED will light on the receiver.
If the ESC sounds a continuous double beep after the flight battery is
connected, recharge or replace the battery.
1. 7. Reinstall the canopy hatch.
CAUTION: Always
keep hands away
from the propeller. When
armed, the motor will turn
the propeller in response
to any throttle movement.
A
B
C
67 – 72mm

EN
9
Transmitter and Receiver Binding / Enabling and Disabling SAFE Select
SAFE Select Enabled
SAFE Select Disabled SAFE Select Disabled
Using the Bind Button: Using the Bind Plug:
SAFE Select Enabled
When SAFE Select is enabled, the control surfaces cycle back and forth twice
with a slight pause at neutral position every time the receiver is powered on.
When SAFE Select is enabled, the control surfaces cycle back and forth twice
with a slight pause at neutral position every time the receiver is powered on.
When SAFE Select is disabled, the control surfaces cycle back and forth once
every time the receiver is powered on.
When SAFE Select is disabled, the control surfaces cycle back and forth once
every time the receiver is powered on.
Press and hold
Bind Button
Press Bind Button
Release Bind Button
Release Bind Button
Orange Flashing LED
Orange Flashing LED
Connect Power
Connect Power
Lower Throttle
Lower Throttle
Bind TX to RX
Bind TX to RX
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
BIND
BIND
SAFE®Select Technology, Optional Flight Envelope Protection
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.
General Binding Tips
• 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 level the aircraft in flight.
• If problems occur, refer to the troubleshooting guide or if needed, contact the
appropriate Horizon Product Support office.

EN
T-28 Trojan 1.1m
10
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.
Mode 1 and 2 transmitters
X 5
100%
100%
Control Surface Centering
After assembly and transmitter setup, confirm that the control surfaces are
centered. The model must be powered up bound to the transmitter in AS3X mode,
with the throttle left at zero. When enabled, SAFE mode is active at power up.
AS3X mode is activated when the throttle is raised above 25% for the first time
after being powered on. It is normal for the control surfaces to respond to aircraft
movement if the aircraft is in AS3X or SAFE modes.
1. Verify the trims and subtrims on your transmitter are zero
2. Power up the model in AS3X mode and leave the throttle at zero
3. Look at the tip of each control surface and verify it is mechanically centered.
4. If adjustment is required, turn the clevis on the linkage to change the length of
the linkage between the servo arm and the control horn.
90˚
90˚
This aircraft includes telemetry between the ESC and receiver, which can provide information like
battery voltage and temperature.
To View Telemetry:
1. Begin with the transmitter bound to the receiver
2. Power on the transmitter.
3. Power on the aircraft.
4. A signal bar appears in the top left corner of the screen when the telemetry
information is being received.
5. Scroll past the servo monitor to view the technology screens.
For more information about compatible transmitters, firmware updates, and how to use
the telemetry technology on your transmitter, visit www.SpektrumRC.com.
Integrated ESC Telemetry