I have suspected for a while that my old analog tach was lying to me. My
Archer's static RPM at take-off was measuring about 22k and the minimum spec
was 2325, but the plane seemed to have good cruise speed. When I pointed an
optical tach through the windshield I read a static RPM of 23.4K. At
cruise, 25K on the analog tach translated to 25.8K on the digital tach.

Any suggestions for a replacement digital instrument? It would be nice to
drop it into the old tach's mounting and possibly get a few more functions
from the same piece of real estate.


--
Regards,
Mike

http://mywebpage.netscape.com/amountainaero/fspic1.html