OFFSET:
Optional separate trims in addition to those for the normal condition. This function is used to automatically change
the trim of a helicopter, for example, when transitioned from hover to flying at high speed. A clockwise-rotation rotor
helicopter tends to drift to the right at high speed, so an aileron offset may be applied to offset the helicopter to the left.
The necessary elevator offset varies with model geometry, so it must be determined by noting collective pitch changes at
high speed. The rudder offset is affected by both revo. mixing and trim lever movement while in the offset function.
Adjustability:
• Complete switch assignability, plus a
CONDITION
option that creates/switches between individual trims for each of the
idle-ups.
• When
OFFSET
is active (its switch is on), moving the
T
RIM
L
EVERS
adjusts the stored offset,
not
the trims in the normal
condition.
• When
OFFSET
is inactive (its switch is off), the
OFFSET
and any trim adjustments to it have no effect (model obeys the
trim settings of the currently-active flight condition.)
• Defaults to
INH
.
• When
OFFSET
is inhibited, trim adjustments made in any flight condition affect all flight conditions.
NOTE: Remember, offsets and revo. mixes are not recommended when using heading-hold/AVCS gyros in AVCS mode
because they conflict with the automatic corrections to trim and torque that AVCS provides.
GOAL of EXAMPLE:
STEPS:
INPUTS:
70
Set up separate trims for each of the
two idle-up conditions.
Adjust the idle-up 2 rudder trim to
correct for torque at high speeds.
Where next?
Open the
Activate the function.
OFFSET
function.
Change switch setting to
E
Select
IDL2
.
Adjust trim settings as needed. (Ex:
rudder to +8%.)
Close menus and confirm difference in
trims between normal and idle-up 2.
for 1 second.
(If
basic
, again.)
to
OFFSET.
to +8%.
E
(7CH) or
G
(7CA) from
NORMAL
to
IDL2
. Check that rudder
trim changes.
THR-HOLD
: see p. 67.
Setting up the Idle-Ups: Throttle and Collective pitch Curves and Revo. Mixing
(
TH-CURVE, PIT-CURVE, REVO. MIXING
for idle-ups: see p. 69.
to
E
.
to
OFF
.
to
2 (IDL2)
.