E-flite UMX ASK-21 BNF User Manual download pdf (Page 8)

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The AS3X system will not activate until the throttle stick or trim is increased for the ﬁ rst time. Once AS3X is

active, the control surfaces may move rapidly on the aircraft. This is normal.

AS3X will remain active until the battery is disconnected.

Initializing AS3X

Initializing AS3X also occurs after binding as previously described, but subsequent connection of a ﬂ ight

battery requires the steps below.

Power on the Transmitter,

then wait 5 seconds

Install the ﬂ ight battery and

connect it to the receiver.

Keep the plane

immobile and away

from wind for 5 seconds.

Continuous LED

Settings for Control Horns

Only the factory setting for the rudder control horn

is shown here because only the rudder linkage can

be adjusted. After ﬂ ying, carefully adjust the linkage

position for the desired control response.

Rudder

Before the ﬁ rst ﬂ ights, or in the event of an

accident, make sure the ﬂ ight control surfaces

are centered. 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.

1. Make sure the control surfaces are neutral

when the transmitter controls and trims are

centered. The transmitter sub-trim must

always be set to zero.

2. When needed, use a pair of pliers to carefully

bend the metal linkage (see illustration).

3. Make the U-shape narrower to make the

connector shorter. Make the U-shape wider

to make the linkage longer.

Centering Controls After First Flights

For best performance with AS3X, it is important

that excessive trim is not used. If the model re-

quires excessive transmitter trim (4 or more clicks

of trim per channel), return the transmitter trim to

zero and adjust the linkages mechanically so that

the control surfaces are in the ﬂ ight

trimmed position.

Control Centering

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E-flite UMX ASK-21 BNF User Manual Page 8

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