Turn coordinator is the LAST one I'd care to give up. Remember needle,
ball, and airspeed practice on your instrument lessons? TC is almost
universally electric, which is an order of magnitude more reliable than the
vacuum pump necessary for the DG and the AI.

Jim


"kontiki" wrote in message
...
Who needs a VSI? Nice to have but not a necessity by any stretch.

That being said, if I had to go without anything else besides
the VSI, I'd next go for the turn coordinator.