Trying to setup my Vtail mixing based on the following procedure of the wiki:
Setup your transmitter with no vtail mixing
- Set both RC2_REV and RC4_REV to 1 and KFF_RDDRMIX to 0.5
- Start by setting VTAIL_OUTPUT to 1. In later steps you may adjust this to 2, 3 or 4.
- Put your APM into FBWA mode
- Pitch up the nose of the plane observe what happens to the vtail
- If the two vtail segments move in opposite directions, then change VTAIL_OUTPUT to 2, and try again.
- If the two vtail segments move in the same direction, but the APM is correcting the pitch in the wrong direction (both segments are moving up) then change RC2_REV to -1
- Next try rolling your plane to the right. The two vtail segments should move to try to turn the plane left (to correct for the right roll). If they move in the wrong direction then set RC4_REV to -1
- Now change to MANUAL mode and adjust your transmitter reversals for channels 2 and 4 to produce the right movement in MANUAL mode.
- Finally adjust the KFF_RDDRMIX to a value that gives the right amount of rudder movement for coordinated turns on your plane. This may require some inflight tuning. A initial guess of around 0.5 is likely to work for most planes
In the above step by step procedure, I am fine with all of the steps colored in green. I am blocking on the step I colored in red, because this explanation is not unambiguous to me : what means exactly "the two vtail segments should move to try to turn the plane left" : does this really mean that the whole plane should turn left (and thus the tail should move right) ? or does this really mean that the tail should turn left (and thus in fact the plane should turn right) ?
Thanks for a clarification (and maybe to adapt the wiki to also make it clear for other dummies like me)