A-13
The Trim System function adjusts the sensitivity of the 12X trim
levers and the Flap and Aux trimmers (right and left trimmers).
The standard digital trims are adjustable from 0–10 with 10
being the coarsest adjustment and 0 being trim off. Adjusting
the digital trim values has no effect on the total trim travel,
however, it affects the resolution of each trim input. When the
value is set to 10, each click of trim adjusts the servo output by
10ms and there are only 10 trim increments from center to each
end. When set to 5, the output is changed 5ms per trim step
and there are 20 trim increments from center to each end. When
set to 1, each click of trim changes the servo output by 1ms
and there are 100 trim increments. When set to 0 the trim levers
cease to function effectively, turning off the trim function. The
right and left trim levers are adjustable from 0 to 200 and can
be turned on/ off. When adjusted to above 100% the trimmer
functions as a two- or three-position switch. Reducing the value
increases the number of output positions.
When adjusting the digital trims (AILE, ELEV, RUDD), the total
trim travel does not change – only the number of increments
(beeps) changes, which makes for finer or coarser trim
movements. When adjusting the analog throttle trim, however,
the total trim travel is actually reduced when set to less than
100%.
Use a fairly coarse setting, such as the factory default 4, when
test flying a model for the first flights in order to be able to
trim it quickly; then use a finer setting, such as 3–1, for final
precision trimming.
83: Trim System
L.S.T. Trim (Limited Standard Trim)
The L.S.T. trim feature has two options: L.S.T. and normal. In
normal, when making trim changes using the aileron, elevator
or rudder digital trims, the center as well as the end points is
affected by the trim values. The right trim causes the center,
the right end point and the left end point to all shift to the
right. When L.S.T. is activated, only the center position is
trimmed. The center is shifted to the right but the endpoints
are not affected. This is useful for aircraft that have a hard stop
endpoint to prevent over-travel caused by trim or if it’s desired
to have trim changes not affect the total roll pitch or yaw rate.
Summary of Contents for JR DSM 12X
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