Mike,
Well to be honest I thought you did mean an electric ASI. If you want a
digital device in 2.25, then Stratomaster make a line of instruments. The
US representative is http://www.aerialadventure.net/
For a mechincal device try a "Winter" They are made for sailplanes. They
are non linear so the resolution at low air speeds (where you really care)
is very good. I have one in 3.25 and I like it lot.
Take a look at
http://store.williamssoaring.com/Merchant2/merchant.mvc?Screen=PROD&Store_Co
de=WSP&Product_Code=01ASI57160W
Winder also does a really nice 3 pointer Altimeter in 2.25, but it is very
expensive.
Regards, Paul
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