It does not have to work for long.
All real gyro aircraft attitude indicators self erect
after
a certain delay.  You don't stay in a turn or dive
forever.

"Most panel mounted gyros use gravity sensitive control
vanes porting air
exiting the gyro housing. An electric fan blows air through
4 ports covered or
opened by the control vanes creating the needed balancing
torques."

Get a couple of mercury switches out of your thermostat
for a mems based unit :)

Paul Lamar



You already have the sophisticated equivalent of those
mercury filled
thermostat tubes on most aircraft instrument panels .....
the ball in
the curved tube in the needle and ball instrument.  It
is another
gravity sensor like the accelerometer.  :-)

SD

Yes but there are no wires coming out so my computer can
sense it.
I would use that periodically to re-erect the MEMS.
If the GPS is saying the altitude is constant and the
aircraft is
not turning time it is to re-erect the MEMS.

Paul Lamar

Needle-ball and airspeed used to be a system relied upon and it was successful for
those of us who had no gyros in the "Good Ol' Days".

                   Bob Keenan