EFL1850 X-VERT Manual

Flight Control Direction Tests

Transmitter Input Test

This test ensures that the ﬂ ight control system is reacting properly to your

transmitter inputs. Assemble the aircraft and bind your transmitter to the receiver

before performing this test.

CAUTION: Keep all body parts, hair and loose clothing away from the

propellers at all times, as these items could become entangled.

Set the transmitter ﬂ ight mode switch to stability mode (position 1).

Holding the aircraft horizontal at the tail, arm the ﬂ ight control system by pressing

and releasing the arming button on the transmitter. The aircraft surfaces will

deﬂ ect quickly in either direction and then to center to indicate the control system

is now armed. Once the ﬂ ight control system is active, the control surfaces may

move rapidly. This is normal.

Move the transmitter controls as shown in the “Transmitter Input” column of the

table. The control surfaces should react to your inputs by moving in the directions

shown in the “Control Surface Reaction” column. If any of the control surfaces do

not respond in the proper direction, ensure the corresponding transmitter channel

is NOT reversed.

Transmitter Input Control Surface Reaction (viewed from the rear)

Before the ﬁ rst ﬂ ights, 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.

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

wider to make the linkage longer.

Control Centering

Center of Gravity (CG)

The CG location is within 126-136mm

(measured forward from the trailing edge of the wing).

CAUTION: Failure to conﬁ rm the correct center of gravity may cause a loss

of control and a crash. Crash damage is not covered under warranty.

126-136mm from

the trailing edge

Control Horn and Servo Arm Settings

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 Arms

Elevons