Wouldn't it be a whole lot easier on everything to just buy an
optical tach - they're about $50. They read RPM directly from
light interrrupted by the propeller blades - 2, 3, or 4 ...
You could then read the RPM in flight - the Rebels natural setting,
OR - with a helper, get a reading just at the start of takeoff.
In Canada, if you have a 'mechanical' tach, I believe you are
supposed to calibrate them every 2 (?) years ....
.... Any CARs experts out there ????
I would worry a lot about damage to the tail & fuselage - I'm
pretty sure designers don't plan for that kind of loading ! I do
know that, when Cessna 150's, retrofitted with 150 hp engines,
were first used to tow gliders, the fuselages were found to be
stretched by over 1" after the first year !!! This resulted in
some major mods !! ;-)
--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com
-------------------------------orig.-------------------------
On Sunday 30 September 2007 12:13, Garry Wright wrote:
Has anyone tied a rebel down by the tailwheel and done WOT tach tests on
a rebel with 150 HP? Any concern about over-stressing the back end of
the airplane?
Garry
068R
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