Well, I finally made it through the holidays, and bought my TNC tach. I think I'm going to be happy with it, though it sure would be nice to have a tach that has the features of the GloBee, with the accuracy of the TNC. Doesn't really seem like too much to ask in this day and age, huh? At least the TNC should show real numbers and not 10 or 100 multipliers for the money!!

Anyway, I wanted steady readings and accuracy, and the TNC is all of that. I tested it in my ultralight trainer airplane. I have a fairly sophisticated computerized electronic engine monitoring system in that plane that is very accurate. The TNC tach agreed with the tach in the monitoring system to within 1 (one) rpm!! Not only that, but I was able to take the readings through the windshield while sitting in the plane. Good performance no doubt.

That means that the engine I'm hopping up has 400 rpm's more than I thought, as the GloBee measured the ultralight engine at 400 rpms slower, (when I fiddled with it enough to get a reading.) So the engine I'm working on has 8400 rpm's instead of 8000. Can't wait to get the engine back on the test stand to verify that!

Thanks for the help and advice,
AV8TOR