wrote


Well. There it is! I wonder when they'll get certification?
I'd like to try a pair on one of our 172s to see if fuel economy and
performance are better. Should be, with variable timing.

The one drawback I can see: They use battery power, with a
built-in alternator in case the aircraft's electrics die. Without an
impulse coupleing, they wouldn't generate enough power for hand-
propping, so my old A-65 non-electric systemed Jodel is out of luck.

One of the models use a backup internal alternator, that should
power the units indefinitely, according to their information. It does need
800 RPM, though, but could be a "get-around" for that.

If you had a small gel cell 12 volt battery onboard, that would supply power
for starting and taxi operations, then switch off the battery, and it will
go to internal power.

With two self powered units onboard, the chances of both of them failing
would be less than both mags failing, I would think.

It would require a check on shut down, and start up, to verify both are
generating their own power.

With the battery shut off and 800 or more RPMs, turn off the starting power
battery, then cycle one unit then the other. If one of the units has
failed, you would know it.
--
Jim in NC

Anyone see a problem with that?