Translations:Help:FAQ:Helisetup/6/en

Setup menu point E - How to get servo horn to a 90 degrees angle?

I cannot get any servo horn arm to be mechanically 90° to the tail boom and MICROBEAST doesn't have a tail "sub-trim" feature. Is trimming in the transmitter allowed?

Don't trim the rudder servo by using the transmitter as this will apply a constant rotation command to the unit! When you can't get the servo horn exactly 90 degrees this has no significant effect. The "90 degrees rule" only should give some good basis for initial linkage adjustment. In flight the system will control the servo all the time anyway, so it's not an issue if center position is slightly offset. It's more important that the tail servo linkage is adjusted correctly in general, so that you get asymmetric tail pitch throw: 40 degrees against main rotor torque direction, approx. 6 degrees at center position and 20 degrees in main rotor torque direction.

By the way: Actually you can trim the tail servo center position using StudioX App or by using Parameter Menu Point A. But as mentioned above this usually isn't necessary to do. Only in some rare cases (using tail gyro in rate mode), correcting center position may be needed.