: BTW, I had also considered the Precise Flight backup vacuum system for
: a while, and it certainly is cheaper (around $700 installed). However,
: I was concerned by the fact that it would do nothing for you in the
: event of failure of the AI vs. the primary vacuum pump.

The DG will still work though. In something like the 172 (or my Cherokee), that's a good chunk of the necessary gyro for IMC.

What about a non-TSO'd electric AI? Seems like one should be able to install one of those for backup purposes.

-Cory

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* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
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