On Fri, 07 Aug 2009 21:52:49 -0700, Ron Wanttaja
wrote:


Finally, I noticed the "Tiny Tach" on the Aircraft Spruce web page.
Seemed pretty good...got its signal by wrapping a wire around a spark
plug cable. From the description, I wasn't completely sure which model
to buy. But when I went to the company's web page, I found they had a
universal "Commercial" model that also updated faster than the standard
units.

http://www.tinytach.com/tinytach/commercial.php

Only $65, so I went ahead and ordered one. It had both a tach function
as well as an hourmeter and two service timers. It didn't need ANY
other connection other than to wrap the sensor wire around a spark plug
cable. It has a built-in battery.


it is indeed a pity that tinytach cant be given the hint that a
replaceable lithium battery would see an aviation market open up for
them. two lithium batteries so that they can be replaced individually
without loss of power would seem a simple mod to make the tach really
useful.
my hp calculators have used the two battery idea for ages.(ever since
I bought them :-) )

Stealth Pilot