RadioLink AT9 Instruction Manual page 68

Clockwise rotation: -20, -10, 0, +10, +20% from low throttle to high.
Counterclockwise rotation: +20, +10, 0, -10, -20% from low throttle to high.
Adjust to the actual values that work best for your model.
Revo. Curves for idle-ups are often v-shaped to provide proper rudder input with negative pitch and
increased throttle during inverted flight.(Rudder is needed to counter the reaction whenever there is
increased torque. In inverted flight, throttle stick below half has increased throttle and negative pitch,
therefore increasing torque and rotating the helicopter unless the revo. Mix is also increasing appropriately.)
Note: The throttle and pitch curves for the normal condition is always on. They cannot be inhibited. The
other four conditions are activated with their throttle curves or throttle hold.
• THR-CURV/NOR: inputs the normal (NORM) throttle curve, which is usually not a linear response to
THROTTLE STICK motion. Adjusting point 4 of the curve adjusts the engine's RPM at the THROTTLE STICK
midpoint, the desired position for hovering. The other 6 points are then adjusted to create the desired idle and
maximum engine speed, and a smooth transition in-between.
• PIT-CURV/NOR: inputs the normal (NORM) collective pitch curve, the collective pitch curve for flight near
hover. The normal collective pitch curve is adjusted to match the throttle curve, providing the best vertical
performance at a constant engine speed, with a starting curve of 4 base, +5 neutral, and +8 to +10 degrees of blade
pitch maximum. You can program the response over a 7-point curve for the best collective pitch angle relative to
THROTTLE STICK movement.
• REVO./NORM: mixes collective pitch commands to the rudder (a PITCH-RUDDER mix) to suppress the
torque generated by changes in the main rotor's collective pitch angle, keeping the model from yawing when
throttle is applied.
Note: There are three revo, mixes available: normal (NORM), idle-up 1/2 (IDL1/2), and idle-up 3 (IDL3).
All 3 are adjustable in the ADVANCE menu. Never use revo mixing in conjunction with
heading-hold/AVCS gyros. For details on revo, including default points for clockwise and counterclockwise
rotating rotors.
Goals
Se t u p No r m a l Fl i gh t
Co nd i t i o n
Throttle/Collective Pitch
Curves and Revo.
Base point: Adjust base point
of throttle curve until engine
idles reliably on ground.
Adjust base point of collective
pitch curve to achieve -4
degrees of blade pitch.
Apply throttle until the
model sits 'light' on its
skids. Adjust base point of
REVO . until model does not
rotate its nose at all.
Hover point: Adjust
collective pitch curve to +5
degrees. Ease heli into a
Steps
Open the
THR-CURVE, Adjust
the first point.(5%)
Open the PIT-CURVE,
Adjust the first
point.(8%)
Open the REVO.MIX
Adjust the first
point.(4%)
Adjust
THR-CURV/NOR
67
Inputs
for 1s to BASIC.(If ADVANCE
to THR-CURVE
5%，
。
to PIT-CURVE
8%，
to REVO.MIX
ON. to point 1
，
Repeat above as needed
again) .
， to point 1 ，
， to point 1 ，
to MIX
， ，
to 4%，
。
to
to
to