Channel allocation.
Left aileron – Aileron channel (2). The servo has pitch + aileron output.
Right aileron – Aux 1 channel (Pitch) (6). The servo has pitch + aileron output.
Front elevator – Gear channel (5). The servo has pitch + elevator output.
Rear elevator – Elevator channel (3). The servo has pitch + elevator output.
Procedure.
1) Use code 13, dual rate travel adjust, to set Ail (2) and Elev (3) to (say)
60%. The travel should be adjusted as necessary but should never be such as to
allow the servo movement to exceed 150% with both input channels at maximum.
2) Use code 17, function select, to inhibit the gear switch. This will allow the
mixed channels to vary about the gear channel neutral position.
3) Use code 51, PGM mix 1, to mix Ail (2) -> Aux 1 (6) 100% both sides of neutral for symmetrical “aileron” servo movement. Use “normal” mix and include trim input so that the aileron trim operates both “aileron” servos.
4) Use code 52, PGM mix 2, to mix Elev (3) -> Gear (5) 100% both sides of neutral for symmetrical “elevator” servo movement. Use “normal” mix and include trim input so that the elevator trim operates both “elevator” servos.
5) Use code 53, PGM mix 3 to mix Aux 1 (Pitch) (6) -> Ail (2) 100% both sides of neutral using the “normal” mix.
6) Use code 54, PGM mix 4, to mix Aux 1 (Pitch) (6) -> Elev (3) 100% both sides of neutral using the “normal” mix.
7) Use code 55, PGM mix 5 to mix Aux 1 (Pitch) (6) -> Gear (5) 100% both sides of neutral using the “normal” mix. No need to use the multipoint mixing facilities with this mix.
8) Use code 68, pitch curve, to set point H at (say) 70% and point L to (say)
30%. The maximum and minimum travel should be adjusted as necessary but should
never be such as to allow the servo movement to exceed 150% with both input
channels at maximum.
Servo reverse (code 11) and mix direction (+ or -) are used to obtain the
required CCPM control movement direction.
With all servo travel directions at normal and negative code 51 and code 52
mixes, all four servos move in the same direction for pitch. The “aileron” servos move in opposite directions for aileron and the “elevator” servos move in opposite directions for “elevator”.
