Revolution Mixing (Only Used With Non-Heading Hold Gyros); Setting Up Revolution Mixing; To Access Revolution Mixing - Spektrum DX7 User Manual

Revolution Mixing (only used with non-heading hold gyros)

The Revolution Mixing Function mixes tail rotor input with the Throttle/Collective function to counteract torque
from the main rotor blades. When set up correctly, the helicopter should climb and descend without a tendency
to yaw in either direction. Because torque reaction varies with different power settings, it is necessary to vary the
tail rotor pitch at the same time. The DX7 offers two (2) separate revolution mixing programs with independent
up and down mixing for each—one for flight mode position N, and the other for Stunt 1 and Stunt 2 positions.
The U, or Up, mixing adjusts the tail rotor compensation for the mid to high throttle/stick setting, and the D, or
Down, mixing adjusts the tail rotor compensation for the mid to low throttle/stick setting.
In the Function Mode, use the UP or DowN keys to select Revolution Mixing screen.

Setting Up Revolution Mixing

First, adjust the helicopter so that it will hover in a neutral position with the tail rotor trim at center. Next,
establish the helicopter into a stable hover; then steadily increase the throttle to initiate a stable climb. The body
of the helicopter will move in the opposite direction to the main rotor rotation. Increase the U, or Up, setting until
the helicopter will climb with no tendency to turn or rotate. At a safe altitude, close the throttle and the helicopter
will descend with the body turning in the same direction as the main rotor. Increase the D, or Down, mix until
the helicopter descends with no tendency to turn or rotate. When attempting this procedure, throttle stick
movements should be slow, and the initial acceleration and deceleration swings should be overlooked.
Press to enter
Function Mode

To Access Revolution Mixing

Press the DowN and SELECT keys simultaneously to access the Function Mode.
Press the SELECT key to select the desired function.
Press the INCREASE or DECREASE key to change the value or function.
0
Press to enter
REVO MIX
[REVO MIX]
NORM
◊UP
DN
STNT
0% UP 0%
0% DN 0%
Press to select
desired channel
SPEKTRUM DX7 • HELICOPTER PROgRAMMINg gUIDE
Press to return
value to default