Oliver Branaschky wrote:Or maybe it's as simple as a mis-calibrated joystick/yoke? I definitely cannot reproduce the behavior either, Bob.
Viele Grüße/Best regards
Oliver
Oliver Branaschky
I fly many other aircraft, all payware, and no issue with elevator or trim with any of them including the A2A Cherokee . In addition I have found numerous mentions of the trim issue on the C 172 on this forum and on Avsim forum on various threads, with the suggestion of setting trim as I mentioned above, at -35% or the bottom of the letter K in Takeoff.
https://a2asimulations.com/forum/viewto ... 64&t=38333
Anyway, I did some more reading on the topic and made a change last night which is not related to takeoff trim setting but to trim wheel movement speed. I had found a Youtube video on speeding up the trim movement on the C 172, when using FSUIPC, and I was having that issue with the trim just moving way to slowly to adjust the trim in any kind of normal manner. In FSUIPC I was using the trim up and down command. The video suggested using instead, a key stroke, the + and - on the num pad and having the joystick trim buttons trigger those letters, and then in FSX or P3D, have + and - set the trim up and down.. https://www.youtube.com/watch?v=RLicQD-jndY This produced a different response when adjusting the trim. When first pressing up or down, the trim wheel starts out slowly and then after a second or two, it speeds up. This produced a faster response of the trim wheel once the non linear movement of the trim wheel reached it's higher rate of turning, but made it difficult to judge how long to hold the trim button down to get the desired trim adjustment, and resulted in trim overshoots when trying to adjust, in other words, to nose up, and then too nose down. Never pass a checkride adjusting the trim like that.
Last night I read about assigning the trim movement in the C 172 using the built in A2A configurator, so I decided to give that a try. I deleted the C 172 trim assignment in FSUIPC for the C-172, and set the trim up and down joystick buttons on my joystick using the configurator. Now I had a totally different trim wheel response. The action is the faster movement of the trim wheel, which I wanted, but now the movement speed was linear. It did not start slowy for 1-2 seconds and then speed up, the speed was constant. Now the combination of setting the takeoff trim nose down at the bottom of the letter K or -35%, and the new linear response of the trim wheel speed using the A2A configurator, the result, trimming the C 172 is now ideal. Upon rotation I get a climb rate of about 7-800 FPM rather than more than 1600 fpm +, and to tweak it for the exact airspeed I want with trim adjustment, to around 80 knots, works perfectly.
Again, the question I ask to anyone that is interested in this take off trim setting topic, is to set your C 172 up for a 700 fpm climb rate after rotating, using the AP, and see what you trim setting settles down at, and post it on this thread. I think you will find that it will be pretty close to -35% or the bottom of the letter K.