FUTABA 8FG Instruction Manual page 110

Normal Curve
The Hovering Pitch trim function trims the pitch
the hovering condition. The hovering pitch can be
rotor speed is constant. This function can be used
for more precise operation.
110
Idle-up 1 Curve Idle-up 2 Curve
[Hovering pitch trim setting]
Hold Curve
Selection example: LD (initial setting)
NORM) can be selected.
CTRM mode: Maximum amount of change
n e a r c e n t e r b y c e n t e r t r i m o p e r a t i o n
(recommended)
N O R M m o d e : N o r m a l t r i m ( p a r a l l e l
movement trim) operation. The advantage
of using this mode is that the hovering pitch
can be adjusted without changing the
curve.
operation direction can be changed.
When this value is made small, trim can only
be used near the center.