ZD T7AH-2400 Instruction Manual - page 31
59
60
◆Pitch Curve
Adjustment of the pitch curve is very similar to the throttle curve adjustment
described in the preceding section. A thorough understanding of the throttle curve
section will make pitch curve adjustment easier to understand.
The T7AH-2400 offers four (4) independent pitch curves: Normal, Stunt 1, Stunt 2
and Hold. Each pitch curve contains five (5) adjustable points — L, 1, 2, 3, and H.
Note: When setting pitch curve for throttle hold, it is necessary for the throttle hold
to be active. if this function is inhibited, the throttle hold pitch curve will not be
visible on the screen.
◇To Access the Pitch Curve Function
Press the DOWN and SELECT keys simultaneously to access the System Mode.
In System Mode, use the UP or DOWN keys to select the PITCH CURVE NORM
screen. Press the SELECT button to access pitch points L (Low), 1, 2, 3, or H
(High) or EXPO.Press the INCREASE or DECREASE keys to change the selected
pitch value or expo on/off.
◆Hovering Pitch Rocker
The hovering pitch rocker operates in the same manner as the hovering throttle
rocker. It is operable while the flight mode is in the N, or Normal, position, and its
function is to shift the center point (#2) of the curve either upward or downward to
adjust pitch at the hover position.
◆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
◆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.
。
◇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.
◆Gyro Sensing
The T7AH-2400 offers two different types of Gyro Sensitivity Adjustments — manual
or automatic. This feature gives the user the choice of selecting gyro sensitivity
manually through the rudder dual rate switch or automatically through the flight
mode switch.
[
REVO
MIX
]
Press to enter REVO MIX
Press to enter
Function Mode
Press to select
desired channel
Press to return
value to default
NORM STNT
UP
0% UP
0%
DN
0% DN
0%
Press to adjust values
[PITCH CURVE]
NORM
Point-3
51
51
INH
1
2
3
H
L
IN
OUT
Press to enter
THROTTLE CURVE
Press to enter
Function Mode
Press to select
desired points
Press to return
value to default
In System Mode, use the UP or DOWN keys to select the THRO CURVE NORM
screen.Press the SELECT button to access pitch points L (Low), 1, 2, 3, or H (High)
or EXPO.Press the INCREASE or DECREASE keys to change the selected pitch
value or expo on/off.
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.!!