Spektrum SPM7800 DX7S - Manual (Page 15)

15 SPEKTRUM DX7s • RADIO INSTRUCTION MANUAL
EN
Throttle, Pitch and Tail Curves
The Throttle, Pitch and Tail Curve Screens support changing
the relationship between control stick positions (five positions,
from 0 to 100%, in 25% increments) and channel output. Curve
programming can change channel response from a linear rate
for small adjustment of response among flight modes. These
functions support adjustment of response during flight modes
of N (normal, or 0 on an assigned switch (see Switch Select)),
1 (Stunt 1, or 1 on an assigned switch (see Switch Select)) and
H (Hold on the assigned Throttle Hold switch (see Flight Mode)).
These flight modes are shown as the boxes marked N, 1 and H
on the Curve screens.
The screens display a 5-point graph on the left to show the
result of the values chosen on the right. Moving the throttle stick
moves a vertical line across the curve graphic. Make Expo ACT
(active) to smooth the sharp-angled shape into a curve across
the five stick position values.
Throttle Curve
This function supports adjustment of throttle response in three
flight modes. When properly adjusted, the main rotor head
speed or rpm (revolutions per minute) should remain consistent
in all maneuvers and throttle stick positions. A constant main
rotor head speed and proper idle speeds improve the operation
of other systems. Throttle curves vary among powerplants, so
adjust values in test flights to get a consistent main rotor head
speed in all flight modes.
Pitch Curve
This function supports adjustment of collective pitch (up and
down movement of the swashplate, using available swashplate
servos) in three flight modes.
Tail Curve
This function mixes tail rotor input with the throttle/collective
function to counter torque from the main rotor blades when
using a non-heading hold (tail lock) gyro or when using rate
mode on a gyro.
Gyro
The Gyro function supports setting gain for gyros that operate
on transmitter programming or with flight modes. Assign the
receiver channel connected to the gyro, then assign the switch
for gyro options. You can also assign values to available switch
positions (from one to three rates are available, depending on
the switch assigned). Make sure the gyro operates correctly and
compensates in the correct direction.