Boeing-Stearman Kaydet PT13/17 US Airforce / Navy Primary Trainer

The Model
We have chosen the scale of 1:5 rendering
a model size that i easy to fly but also relatively
easy to transport. Both the upper and the lower
wing panels can be removed for transportation
which gives very limited requirement for
transportation size. With a .1.20 4-stroke engine
the airplane is capable of most of the manoeuvers
in the book but still as docile as you can demand
from a n advanced trainer.
The finished model is painted in 1939 livery
and further detailing can be made as per
documentation.
Specifications:
Wingspan cm 193
Wingspan inches 77.2
Length cm 149
Length inches 59.6
Weight grams 6600
Weight Lb/oz 14lb. 8 oz.
Wing surface dm² 118 dm²
Wing surface Sq.inch 1888 sq”
Wing load g/dm² 56 g/dm²
Wing load oz/Sq’ 24 oz/sq’
Engine 2-cycle .60 - .90
Engine 4-cycle .90 - 1.20
C/G fr. Lead.edge upper wing 15cm / 6”
Covering and finish
The model is covered and painted from the
factory. Where the original had aluminum covering
panels, the model has the same. This also means
excellent acces to the various compartments in
the fuselage when installing or servicing the radio
equipment. When you have made changes in the
fire wall and adapted the dummy engine to fit in
front of the engine, you will have to cover the open
areas with fuel proof paint.
Installation of engine.
Our prototype was tried with an OS 1.20 FS
surcharge 4-stroke which gave more than ample
thrust. The engine mounts have been installed
for this size of engine and in an upright position
for several reasons.
The need for adequate cooling. The access
to the glow plug easily and finally to get the
carburator in line with the center of the tank.
1. Drill the holed for the engine in the ½"
plywood ingine mount. Install blind nuts underside
of the plywood aligned with the holes
2. Drill the holes from the tank to the
carburator, pressure tap and the filling cap.
3. Install the engine and connect the throttle
servo.
No side or down thrust is deemed necessary. You
can use an flexible exhaust manifold to lead the
exhaust out under the center bottom panel to give
a better apperance.
Installation of servos, tank, battery and
receiver.
The aileron servo is installed in the cockpit
flooring. The elevator servo and the rudder
servo are also installed in the cockpit flooring.
The trottle servo is installed behind the
engine as well as the tank, booth on the
engineboard.
Battery pack and receiver are positioned
in the upper part of the tray.
The switch can be mounted on the front
cockpit instrument panel.
1. Attach a ball link head to joystick and
rudder bar in the appropriate holes. You may have
to enlarge the holes to take the screw from the
ball link (Dubro #189 set of 2).
2. Install the servos for rudder and elevator
and temporarily connect the servo arms to the
ball links. Deflection for elevator is 20° up and
down and for rudder 30° right and left..
3. Install and connect the throttle servo in
the fashion you prefer.
4. Install the tank in the available space at
the right side next to the rudder and throttle
servos..
5. Install the aileron servo in the bulkhead.
The aileron connecting rods attaches to the servo
arm. Deflection of the ailerons should be 20° up
and down. The servo arm should be fashioned to
take 2 clevices approx 1/8" apart.
6. Install the radio switch on the dash board.
7. Place the receiver in the upper part of the
tray and the battery pack in front of the lower
firewall, wrapped in foam rubber and secured with
rubber bands.
Assembly of the PT17
All parts have been assembled at the factory
and only disassembled for transportation.
Rudder wires and elevator pushrod are
factory adjusted but may need some tensioning
adjustment after a while. Aileron bellcranks are
permanently adjusted to the connecting rod.
Assembly of the tail unit
See detail drawing.
1. Attach horizontal tail(3) to fuselage using 3 pcs
4 mm nylon countersunk screws. Make sure that
stabilizer is flat against fuselage.
2. connect the elevator control rod to the elevator
horn.
3. Insert vertical fin and secure to tailpost bracket
and front of stabilizer. Attach rudder on to the fin
with hinge pins.
4. Secure the assembly with screws to the
stabilizer and to the tailpost. Attach the top
stabilizer fairing and secure with screws.
5. Attach fin and stabilixer support wires to top of
fin using 2 mm screw and nut (from top side of
Stearman Kaydet PT17 ARF 7