On Apr 1, 10:06 am, "Ken S. Tucker" wrote:

So in IFR in dense cloud, the AH starts going funny,
one still x-checks against the heading indicator and
the altimeter/rate of descent.
Finally there's the magnetic compass that is fool-
proof, (not idiot proof-Bertie couldn't find it ;-).

Neither the heading indicator nor the altimeter will keep you
upright. The turn coordinator and ASI are for that. The magnetic
compass is useless during a turn, as you *should* know.

Dan (whose IFR rating lapsed eight years ago already. Too busy
fixing airplanes for other people. Where does the time go?)