User Manual

Opterra

Control Horn and Servo Arm Settings

The table to the right shows the factory settings for the control horns and servo

arms. Fly the aircraft at factory settings before making changes.

NOTICE: If control throws are changed from the factory settings, the AR636

gain values may need to be adjusted. Refer to the Spektrum AR636 manual for

adjustment of gain values.

After ﬂ ying, you may choose to adjust the linkage positions for the desired

control response. See the table to the right.

Horns Arms

Elevons

Control Surface Centering

After assembly and transmitter setup, conﬁ rm that the control surfaces are

centered. Make sure that the trailing edge is 1 mm up from the center; this

is the center location for this aircraft. If the control surfaces are not centered,

mechanically center the control surfaces by adjusting the linkages.

If adjustment is required, turn the clevis on the linkage to change the length of

the linkage between the servo arm and the control horn.

After binding a transmitter to the aircraft receiver, set the trims and

sub-trims to 0, then adjust the clevises to center the control surfaces.

PNP Receiver Selection and Installation

The Spektrum AR636 receiver is recommended for this airplane. If you choose

to install another receiver, ensure that it is at least a 3-channel full range

(sport) receiver. Refer to your receiver manual for correct installation and

operation instructions.

Installation (AR636 shown)

1. Remove the canopy from the fuselage.

2. Mount the receiver parallel to the length of the fuselage as shown. Use

double-sided servo tape.

CAUTION: Incorrect installation of the receiver could cause a crash.

3. Attach the appropriate control surfaces to their respective ports on the

receiver using the chart in the illustration.

1 = Throttle

2 = Right Elevon

3 = Left Elevon

4 = NA

5 = NA

6 = NA