GREAT PLANES Ultimate Biplane EP ARF, Instruction Manual

22

GET THE  MODEL  READY TO  FLY

Check the Control Directions

❏

 1. Turn on the transmitter and receiver and center the 

trims. If necessary, remove the servo arms from the servos 
and reposition them so they are centered. Reinstall the 
screws that hold on the servo arms.

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 2. With the transmitter and receiver still on, check all the 

control surfaces to see if they are centered. If necessary, adjust 
the clevises on the pushrods to center the control surfaces.

FULL THROTTLE

RUDDER MOVES RIGHT

ELEVATOR MOVES UP

RIGHT AILERON MOVES UP

LEFT AILERON MOVES DOWN

4-CHANNEL RADIO SETUP

(STANDARD MODE 2)

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 3. Make certain that the control surfaces and the throttle 

respond in the correct direction as shown in the diagram. 
If any of the controls respond in the wrong direction, use 
the servo reversing in the transmitter to reverse the servos 
connected to those controls. Be certain the control surfaces 
have remained centered. Adjust if necessary.

Set the Control Throws

Use a ruler to accurately measure and set the control throw 
of each control surface as indicated in the chart that follows. 
If your radio does not have dual rates, we recommend setting 
the throws at the 

low

 rate setting for your fi rst  few  fl ights.

NOTE:

 The throws are measured at the 

widest part

 of the 

elevators, rudder and ailerons.

These are the recommended control surface throws:

High Rate 

Low Rate

ELEVATOR:

  1" [25mm] up 

5/16" [8mm] up

1" [25mm] down 

5/16" [8mm] down

RUDDER:

2-1/2" [64mm] left 

1-5/8" [41mm] left

2-1/2" [64mm] right 

1-5/8" [41mm] right

AILERONS:

  5/16" [8mm] up 

1/8" [3mm] up

5/16" [8mm] down 

1/8" [3mm] down

3D RATES:

ELEVATOR:

  1-5/8" [41mm] up

1-5/8" [41mm] down

RUDDER:

3" [76mm] left

3" [76mm] right

AILERONS:

  1/2" [13mm] up

1/2" [13mm] down

IMPORTANT:

 The Ultimate Biplane EP ARF has been 

extensively

 fl own and tested to arrive at the throws at 

which it fl ies best. Flying your model at these throws 
will provide you with the greatest chance for successful 
fi rst  fl ights. If, after you have become accustomed to 
the way the Ultimate fl ies, you would like to change the 
throws to suit your taste, that is fi ne. However, too much 
control throw could make the model diffi cult to control, so 
remember, “more is not always better.”