Arrows RC T-28 Trojan User guide

1100mm T-28

1100mm T-28

Operating Manual

Operating Manual

Warning:

a reliable and safe manner. Please read the instructions and warnings carefully prior to assembly, setup or use.

As this model aircraft is a sophisticated hobby product, it must be flown with safety and common sense in mind,
failure in doing so may result in injury or property damage. This product is not intended for use by children without
direct adult supervision.

This manual contains important information that will help you maintain and operate your model aircraft in

Safety precautions and warnings

As the user, you are solely responsible for the safe operation and maintenance of this product. Follow the directions
and warnings listed in this manual, as well as that of supporting equipment (chargers, batteries etc.) and always use
common sense.

This is not a toy. Not for children under 14 years of age.

.

Always operate your model in an open area away from buildings, cars, traffic or people. Never operate near people­especially children who can wander unpredictably. Never operate in populated areas for any reason, where injury or
damage can occur.
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.
Never catch the aircraft while it is in flight, the structure of the fuselage was not designed and protected for this purpose.
Never operate your model in bad weather, including in excessively windy or precipitating conditions.
Never operate your model with low transmitter batteries.
Keep your throttle quadrant in its lowest position prior and after every flight. Use the throttle cut function if able.
Always use fully charged batteries and move batteries before disassembly.
Avoid water exposure to all equipment not specifically designed and protected for this purpose.

Avoid cleaning this product with chemicals.

Never lick or place any part of your model in your mouth as it could cause serious injury or even death.
Keep all chemicals, small parts and anything electrical out of the reach of children.

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Introduction

The North American T-28 “Trojan”, a piston powered two seater trainer aircraft, was the last piston powered trainer to
enter service with the United States Air Force and Navy. Designed in the 1950's, this aircraft played a key role in helping
pilots transition from basic trainers to jet aircraft.
The Arrows Hobby T-28 is one of the easiest flying aircraft on the market today. A beginner with basic flight experience
could easily fly the T-28 with ease- without the assistance of a gyro system.
Featuring a realistic three bladed propeller, rivets, panel lines, landing gear doors and functional flaps, the T-28 looks as
real as its full sized counterpart.
A powerful 40A ESC and 3536 KV850 power system provides more than adequate thrust whenever necessary.
The Arrows Hobby T-28 is a perfect aircraft for pilots transitioning from high winged aircraft and those who are looking for
a scale aircraft that is easy to fly.

Features:

• High power-to-weight ratio.

• Realistic, scale details.

• Simple yet robust airframe.

• Easy assembly.

• No glue required.

• Environmentally friendly water-based paint.

Table of contents Specifications

Introduction
Specifications
Kit contents
Model assembly
Battery installation
Receiver diagram
Preflight check
Clevis installation
Control horn and servo arm settings
Center of gravity(CG)
Before flying the model
Flight tips
Trouble shooting
Spare parts list content
Water decal instructions

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Wingspan

Overall length

Flying weight

Motor size

Wing load

Wing area

ESC

Servo

Recommended battery

1100mm(43.3in)

915mm(36.0in)

~ 1135g

3536-KV850

56.75g/dm² (0.13oz/in²)

20dm² (310sq.in)

40A

9g Servo x 7

11.1V 2200mAh 25C

Kit contents

Before assembly, please inspect the contents of the kit. The photo below details the contents of the kit with labels. If any
parts are missing or defective, please identify the name or part number (refer to the spare parts list near the end of the

manual) then contact your local shop.

A.

D. E.

A: Fuselage
B: Main wing

C: Horizontal stabilizer

B. C.

D: Horizontal stabilizer spar
E: Propeller and spinner set
F: Screws

G.

G: Pushrods

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Model assembly

Wing installation

1.Insert all leads on the wing into the fuselage via the fuselage passthrough. Attach the wing onto the fuselage and
ensure that the wires do not interfere with any of the servos.

2.Secure the wing to the fuselage with included screws as shown. Do not over tighten the screws.

HKM3.0*32 mm

Horizontal stabilizer installation

1.Slide the horizontal stabilizer spar into the slot near the rear of the fuselage.

2.Install the two pieces (left and right) horizontal stabilizer as shown. Ensure the control horn faces down.

3.Secure the two horizontal stabilizer pieces in placing using the included screws.

HKA2.6*12mm

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Model assembly

Pushrod installation

1.Connect the elevator servo to the elevator using the
included pushrod.

2. Connect the rudder servo to the rudder using an
included pushrod.

Propeller and spinner installation

1. Assemble the propeller and spinner as shown below.

Note:The motor should rotate clockwise when viewing
the plane from the rear.

b

a

c

d

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Battery installation

1. Remove the battery hatch.

2. Remove the hook and loop tape from the fuselage. Apply
the looped surface to the battery.

3. Install the battery into the fuselage- securing it with the
preinstalled battery straps.

Note: The weight of each battery may vary due to different
manufacturing techniques. Move the battery fore or aft to
achieve the optimal center of gravity.

Receiver diagram

The cables from the servo connector board should be
connected to your receiver in the order shown. Note that the
LEDs can be powered by any spare channel on the receiver.
Tuck the wire leads into the recessed cavity towards the rear
of the battery hatch.

Spare

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Preflight check

Important ESC and model information

1. The ESC included with the model has a safe start. If the motor battery is connected to the ESC and the throttle stick is not in the low

throttle or off position, the motor will not start until the throttle stick is moved to the low throttle or off position. Once the throttle stick is
moved to the low throttle or off position, the motor will emit a series of beeps. Several beeps with the same tune means the ESC has
detected the cells of the battery. The count of the beeps equals the cells of the battery. The motor is now armed and will start when the
throttle is moved.

2.

The motor and ESC come pre-connected and the motor rotation should be correct. If for any reason the motor is rotating in the wrong

direction, simply reverse two of the three motor wires to change the direction of rotation.

3. The motor has an optional brake setting. The ESC comes with brake switched off and we recommend that the model be flown with

the brake off. However, the brake could be accidentally switched on if the motor battery is connected to the ESC while the throttle stick
is set at full throttle. To switch the brake off, move the throttle stick to full throttle and plug in the motor battery. The motor will beep one
time. Move the throttle stick to low throttle or the off position. The motor is ready to run and the brake will be switched off.

4. Battery Selection and Installation. We recommend the 11.1V 2200mAh 25C Li-Po battery. If using another battery, the battery must

be at least a 11.1V 2200mAh 25C battery. Your battery should be approximately the same capacity, dimension and weight as the 11.1V
2200mAh 25C Li-Po battery to fit the fuselage without changing the center of gravity significantly.

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Preflight check

transmitter and model setup

After assembly and prior to your first flight, make sure all control surfaces respond correctly to your transmitter by referring
to the diagram below.

Control throws

The suggested control throw setting for the T-28 are as follows (dual rate setting):

Tip: The maiden flight should always be
flown using low rates, fly the aircraft until you
are familiar with its characteristics prior to
trying high rates. Make sure the aircraft is
flying at altitude and adequate velocity prior
to using high rates, as the aircraft will be
sensitive to control inputs with the larger
control surface movements.

Aileron

Rudder

12mm up / downElevator

16mm up / down

20mm left / right

8mm up / down

10mm up / down

16mm left / right

Clevis installation

1.Pull the tube from the clevis to the linkage.

2.Carefully spread the clevis, then insert the
clevis pin into the desired hole in the control
horn.

3.Move the tube to hold the clevis on the
control horn.

a.

b.

c.

d.

e.

f.

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Control horn and servo arm settings

Horns

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

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

ElevatorRudderAilerons

Finding the center of gravity

Finding the correct center of gravity is critical in ensuring that the aircraft
performs in a stable and responsive manner. Please adjust the weight
distribution so the aircraft balances in the range stated on the diagram.

• Depending on the capacity and weight of your chosen flight
batteries, move the battery forward or backward to adjust the
center of gravity.

Arms

More control throw

Less control throw

45mm-50mm

• If you cannot obtain the recommended CG by moving the battery to a
suitable location, you can also install a counterweight to achieve correct
CG. However, with the recommended battery size, a counterweight is not
required. We recommend flying without unnecessary counterweight.

Before flying the model

Find a suitable flying site

Find a flying site clear of buildings, trees, power lines and other obstructions. Until you know how much area will be required
and have mastered flying your plane in confined spaces, choose a site which is at least the size of two to three football fields

- a flying field specifically for R/C planes is best. Never fly near people - especially children, who can wander unpredictably.

Performing a range check

A radio range check should be performed prior to the first flight of the day. This test may assist you in detecting electronic
problems that may lead to a loss of control- problems such as low transmitter batteries, defective or damaged radio com­ponents or radio interference. This usually requires an assistant and should be done at the flying site.

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Before flying the model

Always turn your transmitter on first. Install a fully charged battery in the battery bay, then connect it to the ESC. In this
process, make sure that the throttle cut functionality is on, and that the throttle stick is secured in its lowest position- other­wise, the propeller/fan will engage and possibly cause bodily harm.

Note: Please refer to your transmitter manual that came with your radio control system to perform a ground
range check. If the controls are not working correctly or if anything seems wrong, do not fly the model until you
correct the problem. Make certain all the servo wires are securely connected to the receiver and the transmitter
batteries have a good connection.

Monitor your flight time

Monitor and limit your flight time using a timer (such as a stopwatch or on the transmitter, if available). As modern Lithium
Polymer batteries are not designed to discharge completely, when the battery runs low, the ESC will lower then completely
cut the power to the motors to protect the battery.Often (but not always) power can be briefly restored after the motor cuts
off by holding the throttle stick all the way down for a few seconds.To avoid an unexpected dead-stick landing on your first
flight,set your timer to a conservative 4 minutes. When your alarm sounds you should land right away.

Flight tips

Take off

Point the aircraft into the wind while slowly applying power until the aircraft starts to track straight, use the rudder when
necessary. When the aircraft reaches takeoff speed, ease back on the elevator stick until the aircraft is climbing at a
constant rate without decelerating. Climbing at too steep of an angle at the relatively low speeds of a takeoff-climb may
result in an aerodynamic stall.

Flying

Always choose a wide-open space for flying your plane. It is ideal for you to fly at a sanctioned flying field. If you are
not flying at an approved site always avoid flying near houses, trees, wires and buildings. You should also be careful to
avoid flying in areas where there are many people, such as busy parks, schoolyards, or soccer fields. Consult laws and
ordinances before choosing a location to fly your aircraft. After takeoff, gain some altitude. Climb to a safe height before
trying technical manoeuvres.

Landing

Land the aircraft when you start to feel sluggish motor response. If using a transmitter with a timer, set the timer so you
have enough flight time to make several landing approaches.The model’s three point landing gear allows the model to land
on hard surfaces. Align model directly into the wind and fly down to the ground. Fly the airplane down to the ground using
1/4-1/3 throttle to keep enough energy for proper flare. Before the model touches down, always fully decrease the throttle
to avoid damaging the propeller or other components. The key to a great landing is to manage the power and elevator all
the way to the ground and set down lightly on the main landing gear. With some practice, you will be able to set the aircraft
gently on its main gear and hold it that way until the speed reduces enough where the nose wheel (tricycle landing gear
aircraft) or tail wheel (tail draggers) settles onto the ground.

Maintenance

Repairs to the foam should be made with foam safe adhesives such as hot glue, foam safe CA, and 5min epoxy.
When parts are not repairable, see the spare parts list for ordering by item number.
Always check to make sure all screws on the aircraft are tightened. Pay special attention to make sure the spinner is
firmly in place before every flight.

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Troubleshooting

Problem Possible Cause Solution

Aircraft will not respond to
the throttle but responds to
other controls.

Excessive vibration or
propeller noise.

Reduced flight time or
aircraft underpowered.

Control surfaces
unresponsive or sluggish.

Controls reversed.

Motor loses power
Motor power pulses then

motor loses power.

ESC is not armed.

Throttle channel is reversed.

Damaged spinner, propeller,
motor or motor mount.

Loose propeller and spinner parts.
Propellor installed backwards.

Flight battery charge is low.
Propeller installed backward.
Flight battery damaged.

Control surface, control horn,
linkage or servo damage.

Wire damaged or connections
loose.

Channels are reversed in the
transmitter.

Damage to motor, or battery.
Loss of power to aircraft.
ESC uses default soft Low Voltage

Cutoff(LVC).

Lower throttle stick and throttle trim to lowest
settings.

Reverse throttle channel on transmitter.

Replace damaged parts.
Tighten parts for propeller adapter, propeller

and spinner.
Remove and install propeller correctly.

Completely recharge flight battery.
Replace flight battery and follow flight battery

instructions.

Replace or repair damaged parts and adjust
controls.

Do a check of connections for loose wiring.

Do the control direction test and adjust controls for
aircraft and transmitter.

Do a check of batteries, transmitter, receiver, ESC,
motor and wiring for damage(replace as needed).

Land aircraft immediately and recharge flight battery.

LED on receiver flashes
slowly.

Spare parts list

AHAC101

AHAC102

AHAC103

AHAC104

AHAC105

AHAC106

AHAC107

AHAC108

AHAC109

AHAC110

AHAC111

AHAC112

AHAC113

AHAC114

AHAC115

AHAC116

Power loss to receiver.

Fuselage

Main wing set

Horizontal stabilizer

Cockpit

Cowl

Spinner

Front Landing Gear Se

Main Landing Gear Se

Front Landing Gear System

Main Landing Gear System

Linkage Rod

Horizontal stabilizer spar

Screw set

Decal Sheet

Front landing gear housing

Main landing gear housing

Check connection from ESC to receiver.
Check servos for damage.
Check linkages for binding.

AHRE002

AHPROP003

AHMount001

AHShaft001

AHBoard003

AHKV850

AHESC40A

AHSER9G54P

AHSER9GP

AHSER9GR

E-retract

Propeller

Motor Mount

Motor Shaft

Motor Board

3536-KV850 Motor

40A ESC(200mm input cable)

9g servo 54 degree

9g servo positive

9g servo reverse

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Water decal instructions

1.Put the decal in water to bring it to full absorption.

2.Carefully remove the decal from the backing paper and apply it on the corresponding position of the airframe (it would be
helpful to wet the corresponding position of the airframe to adjust the decal).

3.Soak up the excess water with tissue, squeeze out air slowly, and wait for drying.

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