"kickinwing" wrote in message
oups.com...
I have always read and been taught that a turn coordinator is usually
powered by electricity. Is the turn coordinator, in itself, an
electric motor? Or does an electric-powered fan supply the air to spin
the gyro?

Anybody have any insight for me? Thanks.

They are mostly electric, and turn the gyro, directly. There are also
backup vacuum sources, powered by electric, but they are rare in single
piston airplanes.

It is a way of making a little bit of backup, to keep your wings right side
up, when your vacuum pump packs it in while you are in IMC.
--
Jim in NC