All I am doing by raising the tail with the aircraft stationary on the ground is altering the angle made between the pivot stalk and the horizontal plane of the compass ring
+++++++++++++++ you are also changing the angle between all that and the big magnet inside mother earth --------------------------- why doesn't it happen with the compass in my friend's Tiger Moth? ++++++++++++++++++++ Give him a head-up, he needs to service his compass. -------------------- A frisbee balanced horizontally on the top of my finger ++++++++++++++++++++ It is made of plastic - sit UBU, sit. Sorry - I am in one of those moods today Steve J
