VQ Model Trojan T-28 User manual

SPECIFICATIONS
Wingspan:.....................................1870mm
Length:......................................... 1350mm
Electric Motor:.............900Watt - 80A. ESC
Glow Engine:..................120 4T / 75-95 2T
RTF Weight: 5.3 - 5.6Kg (Will vary with
Equipment Used).
Radio:.................................See next pager
WARNING! This radio controlled model is NOT a toy. If modified or flown carelessly it could go out of controll and
cause serious human injury or property damage. Before flying your airplane, ensure the air field is spacious enough.
Always fly it outdoors in safe areas and seek professional advice if you are unexperienced.
ACHTUNG! Dieses ferngesteuerte Modell ist KEIN Spielzeug! Es ist für fortgeschrittene Modellflugpiloten bestimmt,
die ausreichende Erfahrung im Umgang mit derartigen Modellen besitzen. Bei unsachgemässer Verwendung kann
hoher Personen- und/oder Sachschaden entstehen. Fragen Sie in einem Modellbauverein in Ihrer Nähe um
professionelle Unterstätzung, wenn Sie Hilfe im Bau und Betrieb benötigen. Der Zusammenbau dieses Modells ist
durch die vielen Abbildungen selbsterklärend und ist für fortgeschrittene, erfahrene Modellbauer bestimmt.
Radio control model / Flugmodel
ALL BALSA, PLYWOOD CONSTRUCTION AND ALMOST READY TO FLY
Instruction manual / Montageanleitung
Made in Vietnam
All balsa and
plywood
Construction
Gas Engine: ..................................17-20cc

SILICON
CA
GLUE
Silicon sealer Cyanoacrylate Glue (thin type)
Extension cord for aileron servos: 60cm(x2)
TOLLS REQUIRED
Hobby knife
Needle nose Pliers
Phillip screw driver
Awl
Scissors
Wire Cutters
(Purchase separately) Hex Wrench
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Sander
Masking tape - Straight Edged Ruler - Pen or pencil - Drill and Assorted - Drill Bits
Read through the manual before you begin, so you will have an overall idea of what to do.
(Purchase separately)
If exposed to direct sunlight and/or heat, wrinkels can appear. Storing the
model in a cool place will let the wrinkles disappear. Otherwise, remove
wrinkles in covering film with a hair dryer, starting with
low temperature. You can fix the corners by using a hot iron.
Bei Sonneneinstrahlung und/oder Wärme kann die Folie erschlaffen bzw. Falten
entstehen. Verwenden Sie ein Warumluftgebläse (Haartrockner) um evtl. Falten aus der Folie
zu bekommen. Die Kanten können Sie mit einem Bügeleisen behandeln. Nicht zuviel Hitze anwenden !
REQUIRED FOR OPERATION (Purchase separately)
Low seting
Extension cord for flap servos: 40cm(x2)
Extension cord for retract servos: 40cm(x2)
Extension cord for Rx battery pack: 30cm(x1)
EPOXY A
EPOXY B
Epoxy Glue
(5 - 30 minute type)
Extension cord for gear door servo: 30cm(x1)
Gas engine:
4T 20cc
Minimum 8-9 channels radio
(Saito FG-21 / FG19R3)
Fiber glass or wooden propeller, depend of the
engine or Electric motor.
This model is highly pre-fabricated and can be built in a very short time. However, the work which you
have to carry out is important and must be done carefully.
The model will only be strong and fly well if you complete your tasks competently - so please work
slowly, accurately and check every joints, maybe apply more glue to be safe.
SAFETY NOTES BEFORE ASSEMBLING
6 standard servos:
- Aileron: 2
- Elevator: 2
- Rudder: 1
-Nose gear: 1
4 mini servos:
- Flap: 2
- Gear door: 1
- Throttle: 1
Brushless motor: 900w / 60A
ESC:80A
1.5mm
AB
!
CA
L/R
Assemble left and right
sides the same way.
X
Drill holes using the stated
size of drill
(in this case 1.5 mm Ø)
Use epoxy glue
Take particular care here
Hatched-in areas:
remove covering
film carefully
Not included.
These parts must be
purchased separately
Check during assembly that these
parts move freely, without binding
Apply cyano glue
1
Erertract and Strut
set for T-28: VQ-ARE33

......4
............4
4x25mm hex bolt
Blind-nut
4mm washer
............4
Reposition the engine mount beams on to the fire-wall
and secure them with four 4x25mm hex bolt.
Insert the blind-nut onto each of the four holes make
above.
A
FRONT-VIEW
! Align the mark on both engine mount
beams with the mark on the firewall.
A
Attach the engine mount beams onto the fire-wall so the distance between of two
engine mount beams is “A”.
Secure the engine mount beams onto the fire-wall with litter CA glue.
Using a pencil or felt tipped pen, mark the fire wall where the
four holes are to be drilled.
Carefully remove the engine mount beams and drill a 5mm hole
through the fire-wall at each of the four marks made above.
5mm
1- Glow engine
2

3x20mm screw
Nut .............4
...4
Position the engine to the engine mounts so the distance from the
prop hub to the fire-wall is 135mm (*).
Mark the engine mounting plate where the four holes are to be drilled.
Note: This distance (*) depends on the type of engine you use.
Remove the engine and drill a 3mm holes through the beam at each
of the four marks made above.
Marking sure that you drill the hole perpendicular to the beam of the
engine mount.
Reposition the engine on the engine mount beams, aligning
it with the holes. Secure the engine to the engine mount
using four 3x25mm hex bolts.
Note: Apply Silicon sealer to each of the
3x25mm bolt and nut.
2- Glow engine
3mm
3

Using a aluminum motor mounting plate as a template,
mark the plywood motor mounting plate where the four
holes are to be drilled.
Remove the aluminum motor mounting
plate and drill a 3mm hole through
the plywood at each of the four marks
marked .
3mm
5mm
! Align the mark on the plywood motor mount
with the mark on the firewall.
Remove the wooden motor mounting
plate and drill a 5mm hole through
the fire-wall at each of the four marks
marked.
3- Electric motor
4

3mm bolt / nut...4
Secure the Motor to the wooden
motor mounting plate using the
four 3mm hex bolts.
Attach the four 5x80mm bolts
and nuts to the fire-wall as
shown.
5x80mm bolt....4
5mm nut.......12
5mm washer..16
Distance from the prop hub to the fire-wall is 135mm.
135mm
4- Electric motor
5

Ensure that the fuel tank clunk does not touch the rear of
the fuel tank.
Checking for leaks - block the vents and blow into the feed,
if in doubt submersing the tank in a blow of water will show
up any problems.
Blow
Water
2
After confirming the direction . Insert this assembly, clunk
end first, into the fuel tank and tighten and screw the fuel
tank-cap on firmly.
5- Fuel tank
6
X
Filler tube
To engine
3x20mm
bolt
Rubber stopper
1

30cm Extension cord
Using the thread (pre-installed
at factory) to slide the aileron
extension cord into the wing half.
X
6- Wing: extension cord & flap servo
7

1mm
1mm
Thin CA
CA
Hard wood servo mount
A
! Securely glue together. If coming off during fly,
you lose control of your air plane.
A
To be safe, you must attach the two 2x8mm
screws as shown in this picture.
!
IMPORTANT:
2x8mm screw
servo mount
servo hatch
7- Wing: aileron servo
SILICON
Threadlocker
2x8mm self tapping screw
......2
2mm connector
......2
X
8

1mm
2x8mm self
tapping screw
2mm
2mm
SILICON
Threadlocker
8- Wing: aileron and flap linkages
Plastic control horn
..............................4
2x30mm screw
.........................8
2x8mm self tapping screw
...............8
2mm connector
...............2
2x175mm push rod
.......4
9

CA
CA
Note: Make sure that the dowel must be perpendicular
with the wing root before glue.
9- Wing: wooden dowel
10

1A 1B
Using the nylon gear strap
as a template, mark the
plywood gear mount where
the four holes to be drill.
Remove the nylon gear
strap and drill a 2mm hole
at each of the four marks
marked.
1C 1D
1E
Attach the ply gear mount plate
to the plywood gear mount
1F 1G
Drill a 2mm holes through the
square plastic and ply gear
mount plate.
Secure the ply gear mount
using four 3x20mm screws.
Reposition the nylon gear
strap and secure them in
place using four 3x20mm
screws.
1H
2mm
Ply gear mount
plate x 2
Plywood Gear mount
x 2
3x20mm screw
.......16
Nylon gear strap
.......4
Square plastic
x2
Main gear (left)
Main gear (right)
Insert the main landing gear
into the slot on the gear
mount, if necessary, use
sander to widen the slot to
make this easier.
10- Wing: fixed gear assembling
11

.........8
3x12mm self tapping screw
11- Wing: fixed gear installation
12

12- Wing: fixed gear installation
2x8mm self tapping screw
......4
4.2mm collar
......4
13

1
ON
OFF
GEAR
SWITCH
EXTENDED
RETRACTED
Extend retract with your transmitter and receiver or
with servo driver.
2
Make a key area with a file on music wire adapter.
13- Wing: main gear housing cover
2x8mm self tapping screw
......16
14- Wing: Eretract landing gear
Note: Eretract and strut must purchase separately
14

5 6
...then tighten the locking bolt. Slip the wheel on the axle with the circlip
pointing away from the strut...
3 4
Fix the adapter in the retract with hexagon socket
screws supplied with scale oleo strut.
Fix the strut on the adapter....
7
Attach the axle to the gear and tighten the locking bolt
(use LOCTITE threadlocker on every bolt).
15- Eretract assembling
15

16- Eretract installation
16

Radio connection
1-Plug the connector from each of the retract unit into
the 2 in 1 wire harness (not supplied).
2-Plug the single lead from the wire hardness into the
gear channel of your receiver. An auxiliary channel can
be used if the gear channel is occupied.
Operation
Before operating the retracts in the model for the first time,
check that there are no obstructions in the wheel that could
impede operation of the gear.
Turn on transmitters and then receiver. Use the gear of
other assigned switch to activate that landing gear and check
that it operates correctly.
If the switch direction is opposite of that desired, use the
reversing function in the transmitter to change the retraction
direction.
If using a 2.4GHz radio, once you have set the correct servo
direction, be sure to rebind the system before flight.
T-28B A
B
A
T-28
Note: Do not glue the wooden gear door mounts
(AT and BT) to the struts at this time.
17- Eretract: Radio connection & operation
18- Gear door
AT
BT
17

When satisfied, secure the wooden gear door mount in place using CA glue.
Connect the electric retract with the radio to check the position of the wheel
and the gear door when the electric retract in retracted position. Ensure
smooth non-binding movement.
ON
OFF
GEAR
SWITCH
RETRACTED
CA
19- Gear door
CA
18

20- Canon adaptable & external load support
AB
H-RK
CA
19