On May 19, 6:54 pm, Mxsmanic wrote:
Ken S. Tucker writes:
I disagee. If all Instruments go dead, go to
magnetic compass for heading, even in a fog, that's
SOP.

If you have a compass, all instruments are not dead.

Well duh, it's a magnetic compass in a fluid.

However, that won't be enough in IMC.

Is for me.

Maintaining altitude is "seat of pants" thing, so
what? Set cruise RPM and feel airspeed.

That isn't possible.

Sure it is.
As long as you're not accelerating, which is something
that can be sensed by audio RPM , the magnetic
compass can operate as an artificial horizon too,
because it's like a plumb-bob.
It's of course, independant of operating systems.

IIRC, the magnetic compass is on pre-flight check
list, date of calibration and ascertain operation on
taxi.
Ken