User's Instructions

Helicopter
(HELI)
Section
– 97 –
Helicopter Flight Trimming Chart
This procedure assumes helicopter is trimmed for hovering. Trimming must be done in
near-calm conditions. Repeat tests several times before making adjustments. If any changes are
made, go back over the previous steps and verify, or further adjust as necessary.
To test … Test Procedure Observations Adjustments
1. RVMX mixing
— Up settings
(Part 1)
Fly the model straight
and level into the wind
at 100 ft altitude, lower
pitch to 0°
Observe rotation as helicopter
descends
A. No rotation
B. Model rotates
counterclockwise
C. Model rotates clockwise
A. None
B. Add right rudder trim
C. Add left rudder trim
2. RVMX mixing
— Up settings
(Part 2)
Bring the helicopter into
hover, add full pitch and
ascend 75 ft
Observe rotation as helicopter
ascends
A. No rotation
B. Model rotates
counterclockwise
C. Model rotates clockwise
A. None
B. Increase UP RVMX mix
C. Decrease UP RVMX mix
3. RVMX Down
mixing settings
Begin Down RVMX
mixing with same
number as UP mix.
From inverted flight
(top of loop, or mid-
point of roll, or inverted
part of split-S), add full
negative pitch
Observe rotation as helicopter
ascends
A. No rotation
B. Model rotates clockwise
C. Model rotates
counterclockwise
A. No adjustment
B. Increase Down RVMX
mix
C. Decrease Down RVMX
mix
Adjusting Hovering Pitch and Hovering Throttle
RPM Stick Primary Corrective Action
High Below 1/2 Decrease hovering throttle
Low Below 1/2 Decrease hovering pitch
Perfect Below 1/2 Decrease hovering throttle, decrease hovering pitch
High 1/2 stick Increase hovering pitch, decrease hovering throttle
Low 1/2 stick Decrease hovering pitch, increase hovering throttle
Perfect 1/2 stick Don’t touch a thing!
High Above 1/2 Increase hovering pitch
Low Above 1/2 Increase hovering throttle
Perfect Above 1/2 Increase hovering pitch, increase hovering throttle
Want more Keep 1/2 Decrease hovering pitch, then increase hovering throttle
Want less Keep 1/2 Increase hovering pitch, then decrease hovering throttle