|
Automatic trim
This is recommended, but is not absolutely essential. Auto-trim works independently
of the auto-pilot, and makes life considerably easier for beginner and propilot
alike. To use it, your transmitter needs a momentary (self-centring) button
or a toggle switch, assigned to an auxiliary channel. Many transmitters feature a
Trainer switch which can be re-programmed for this purpose. The AUX channel
has to be confi gured as the trim function using a PC. When the model is fl ying, a
brief button-press is suffi cient to record the trims automatically for aileron, elevator
and rudder (tail rotor). The settings are stored in the unit, but can be revised
at any time. The automatic trim function requires around eight seconds of steady
hovering in order to record the correct trim values; they can then be called up
immediately by pressing the trim button. Automatic trim can also improve the
performance of the integral tail rotor gyro if the neutral pitch angle of the tail rotor
blades is not adjusted properly. Independently of this, the tail gyro has once to be
adjusted manually, see page 30!
To activate auto-trim, the AUX channel has to be confi gured as the trim input
using the PC adaptor. The trim is then triggered by switching the AUX signal
to +100% (> approx. 60%) (note that in Futaba transmitters „-100%“ means „+
100%“ and vice versa).
The LED fl ickers red to indicate while auto-trim is being sent.
The AUX-channel, if assigned to auto trim, will still switch off the heading-holdmode
by a negative signal -100% (< -60%), but Gyro sensitivity has to be set by
PC only. Thus a gyro-mode-switch can be combined into the same channel (e.g.
by fl ight state programming). If you wish heading-hold, then the AUX channel
must not send a negative signal; the trim switch should only switch between zero
and +100% (Futaba = -100%). Note that the trim channel must not be assigned
to any other transmitter control actions which you may have programmed, as you
might then trigger auto-trim accidentally. The trim switch should only be operated
with the model in fl ight (unlike the SET-button).
For erasing the internal auto-trim values:
call up the set-up mode (page 23), and then switch on again.
这是关于AUTO TRIM的说明,英语好的帮忙准确翻译一下 |
|