On Monday, 7 March 2016 09:03:36 UTC+11, wrote:


There is absolutely no difference in measured wing frequency whether done on a cradle or main / tail wheel skid or wheel. Try it out before you write otherwise. - Rolf
Rolf

I have tried it out - and have seen differences. One in particular was 135 on the wheel and 141 on the cradle. That's not a huge difference, but enough to warrant a closer look, so consistency in technique will help avoid false alarms.

Clyde