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Radio equipment 

 

Failure to use the recommended servos, output arms, extensions, and hardware 
may result in a loss of control! 
 

Throughout this manual we have used JR equipment. If you make use of another 
manufacturer, please use equipment with similar specifications! 
 
The model will require extension leads! Please use high quality extension leads. 
 
The trend nowadays is to use dual battery management systems and dual RX equip-
ment. Using S-bus or X-bus will simplify your installation. Consult your radio manufac-
turer for further detail. 
 
Always center and install the correct output arms while on the bench, once the servo is 
in the aircraft access to the servo arm screw is sometimes limited. 
 
Do not save any money when buying radio equipment. The price of servo’s are far 
from the price of replacing the entire model. 

 
REMEMBER: The best equipment is only as good as the weakest link. Ask your-
self if this servo or link or lead etc is worthy of my trust to protect my very large 
investment... 

 

Accessories 

 

 

1.  2 DS8911 servo’s for the elevator. 
2.  2 DS 8911 for ai 2 DS 8911 for Flaps 
3.  1 DS8911 for rudder 
4.   1 JR8511 steering servo.  
5.    2 x 2way valve + 1 x 1way   sequencer for landing gear + doors + brakes 
6.    Powerbox Royal with build in matchbox function. 
7.    Pneumatic support set for landing gear  
8.   1 x Turbo prop motors, with power 5kW with accessories. 
9.    Fuel tubing, Hopper tank (or BVM UAT), festo fittings, fuel filters, fuel tube etc 
10.  Cable ties in various lengths.  
11.  Radio system with S-bus or X-bus technology (will simplify the radio installation) 

 

Did you understand everything in this manual completely? 

Then, and only then, let’s start assembling your model. If not, please read it 

again before you start the assembly.

 

Assembly & Operation Manual 

P-8               

Summary of Contents for PC21 Arf Pro

Page 1: ...f PRO model Landing gear and doors are factory installed Before you start building and set ting up your aircraft please make sure you have read this instruction manual and understood it If you have an...

Page 2: ...EALTH 7 GENERAL ASSEMBLY TECHNIQUES 7 RADIO EQUIPMENT ACCESSORIES 8 KIT CONTENTS 9 OPTIONAL PARTS 10 WING 11 STABILIZER RUDDER 12 FUSELAGE 13 FUEL CELLS 14 FUEL DIAGRAM 15 AIR SYSTEM 16 AIR DIAGRAM 17...

Page 3: ...s reason we at Skymaster are unable to guarantee or provide a contractual agreement with any individual or company that the model you have made will function correctly and safely You as operator of th...

Page 4: ...n the shade Extreme temperatures will damage the paint Finishing Your All White PC21 ARF PRO It is always best to fully assemble the model before painting By doing so no damage or glue prints will rui...

Page 5: ...specially marked access points for the hooks of cranes Inspect your model before and after a rough landing Make sure all parts are safe and sound Inspect model before and after transport A sudden sto...

Page 6: ...uality plane that is not so strong or safe Jet models require good gluing techniques due to the higher flying speeds and hence higher loads on many of the joints We highly recom mend that you use a sl...

Page 7: ...t extra resin will add up to a heavy model Plan before you glue The glass cloth side of parts to glue should be sanded with 80 grit paper for best glue adhesion Support the fuselage on foam pads Skyma...

Page 8: ...m the price of replacing the entire model REMEMBER The best equipment is only as good as the weakest link Ask your self if this servo or link or lead etc is worthy of my trust to protect my very large...

Page 9: ...front and rear section Fin Rudders engine hatch Nose gear Main gear doors installed Wings left and right flaps aileron Elevator left and right Flap horns fearings Canopy assembly glass Wing tube Stabi...

Page 10: ...2 x Pressure Gauges 1 x Electronic Brake Valve 5 x Air Tubing 10 x Quick Disconnect 8 x T pieces Accessory Set Fuel Tank Jettronic 2way 1 way valve Sequencer Control Brake Gear and Doors Photo 2 Phot...

Page 11: ...and high of each hinge same When dry trail fit the hinge fairings Glue in place Secure flap servo with aluminum brackets Mark slots for flap pushrod Dremel slots to clear push rods Glue flap horn to...

Page 12: ...Mark location of horn Dremel hole to clear horn refit horn Fit horn to servo bracket via root of stab Mark location for elevator horn Cut slot for horn Glue horn with 5 minute epoxy Make sure the hor...

Page 13: ...dy up the air line Use quick disconnects between wing and fuselage Check operation of landing gear and doors Install JR DS8511 steering servo Bolt with 4 x M3 bolts and lock nuts Centre servo and conn...

Page 14: ...rners of inside of tanks Fit to main tank Mark pipes for inlet and outlet Plumb tank using diagram on next page Fill tank and check for leaks Secure tank with ply bracket and 2 bolts Drain tank with t...

Page 15: ...FUEL CELL DIAGRAM P 15 Assembly Operation Manual Photo 21...

Page 16: ...ystem by using color air tubing T all same color tubing together until a single pipe emerge Fit electronic valves sequencers on tray The air system will consist of Air up Air down retracts 2 Air up Ai...

Page 17: ...AIR DIAGRAM P 17 Assembly Operation Manual...

Page 18: ...follow the instructions supplied with your turbo prop Run all turbine wires and power cables on opposite side of servo wires Install fuel pump close to UAT We recommend to make use of a mechanical shu...

Page 19: ...fuselage Secure rear of cockpit with 2 screws Check that canopy clear the cockpit Trim if needed Install pilot If you ordered the all white you will need to cut glass and glue after painting Use non...

Page 20: ...21 basically consist of 7 circuits 1 Servo wires 2 Power cables 3 Data cables 4 Pneumatic pipes 5 Air pipes 6 Fuel pipes 7 RX cable Satellite Receivers Please try and separate these circuits as far as...

Page 21: ...location of CG unless you are experience and have some feel of model before CG 175mm from leading edge Dry weight will be between 40 and 45 lbs depending equipment 100 120 psi for pneumatic system Ma...

Page 22: ...stics Select the flaps to the takeoff position there should be no pitch change Ex tend the gear and select full landing flaps adjust the power to maintain level flight and a speed of about 80 90mph Cl...

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