Spektrum SPMAR7200BX - Manual (Page 21)

EN
21
Direct Cyclic Feed
Forward Too High
This causes over-control in your cyclic input.
When set too high, the control loop overshoots and
needs a steer back correction. This causes pitch
backs (bobbles) on cyclic stops and imprecise fast
forward flight.
Direct Cyclic Feed
Forward Too Low
The helicopter will feel softer, slower and less
direct.
Cyclic Gain Too High Helicopter feels “soft” in flight and tends to
oscillate on the elevator axis.
Cyclic Gain Too Low The helicopter will feel softer, slower and less
direct.
Dials and Tail Gyro Gain
To adjust the dials: Only use the original Spektrum AR7200BX adjustment tool to
prevent damage to the dials.
Dial 1: Swashplate—Cyclic Gain
Turn Dial 1 clockwise to increase the swashplate gain.
Factory setting for Dial 1 is horizontal (50% swashplate gain). Use
the factory setting for your first flights. Typically this setting is ideal
for 450 class helicopters. If you are flying larger helicopters it may
be necessary to slightly increase the cyclic gain positions.
The higher the gain, the more aggressively the helicopter will stop after cyclic
movement and the helicopter will feel more stable in the air.
Dial 2: Swashplate—Direct Cyclic Feed Forward
Turn Dial 2 clockwise to increase the swashplate’s direct cyclic stick feed forward.
The direct cyclic stick feed is the part of the stick input going directly to the servos.
When correctly adjusted, the direct stick feed allows the control loop to make small
corrections and work more efficiently.
Factory setting for Dial 2 is horizontal.
Increasing the direct cyclic feed forward will cause more cyclic stick input to go
directly to the aileron and elevator on the swashplate giving a more responsive feel.
Decreasing the direct stick feed forward does the opposite.
The optimal setting depends on many factors, including blades, servos, head
speed, size and mass of the helicopter.
ImpoRTANT: The direct cyclic feed forward does not affect the maximum rate of
rotation. If the helicopter rotates too slowly:
1. Check the swashplate limiter settings in Setup menu point (L)
2a. Change the control behavior in Parameter menu point (B) or
2b. Increase the servo travels or dual rate in your transmitter