UMX F-27 Evolution BNF Basic Manual

Before the first flights, or in the event of an accident,

make sure control surfaces are centered when

the transmitter controls and trims are neutral. The

transmitter sub-trim must be set to zero.

Adjust the linkages mechanically if the control surfaces

are not centered. Use of the transmitter sub-trims may

not correctly center the aircraft control surfaces due to the

mechanical limits of linear servos.

Make the U-shape narrower to make the connector shorter.

Make the U-shape wider to make the linkage longer.

NOTICE: Ultra micro linear servos are unique in that they

are calibrated to reach maximum travel at 100% travel

adjust. Increasing the value above 100% will NOT result

in more travel, but can cause the servo to lock and will

result in a crash.

The recommended CG location is 75mm (2.95 inches)

forward from the ﬁ rewall at the back of the fuselage. This

CG location has been determined with the included 3S

300mAh 11.1V Li-Po battery installed approximately in the

center of the battery cavity.

The battery cavity is oversized to allow for center of gravity

adjustment. Start by placing the battery in the center of the

cavity and adjust as necessary to achieve the proper center

of gravity.

Control Horn Settings

Control Centering

Adjusting Center of Gravity (CG)

The table at the right shows the factory settings for the

elevon control horns and servo arms. Do not make changes

to the elevon linkages.

Control Horns Servo

75mm