Thanks Chuck.

Water temp sensor is mounted just under oil filter pad in the drive

end-housing

and so the the water pressure sensor (with about 4" hose to the electronic
sensor). When running it on the ground I did get a pressure reading. A

temporary

blockage (or intermittent wire failure to the sensor) seems likely.

Temporary ignition coil failure seems likely. Coming to think of it,

could have

been the same situation that occurred at 25 hours when I blew out my old

muffler

(when I still had one under the carbs). Very similar situation then - full
throttle and leaning. Is it possible that misfiring could put extra

stress on the

muffler?  Maybe un-ignited gasses from one rotor getting ignited in the

muffler

by the exhaust from the other rotor and burning/exploding in the muffler?

I'll move my RS temp probes over onto the coils.

Finn

Bill Freeman wrote:

  Finn,

  An old trick to make a lot of noise (and probably blow up the muffler) was to
swithch off the ignition while the engine is being driven by the wheels (pumping
fuel/air thru it but not igniting it) and then you would get a nice BANG
when the
ignition was switched back on.  Perhaps you are right and your ignition somehow
cut off momentarily, filling the exhaust system with fuel/air mix and then
the ign
came back on and ignited it, blowing it off of the plane.

Just a theory, see how it fits with your extra facts that I don't have.
Good luck.

Bill

The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org