Bill,
Great flying and decision making to get it back on
the ground with "minor" damage!!!
I sure hope we can find the cause to prevent it in
the future.
One idea: Rotor #1 - still great comp.
Rotor #2 - None. First flight after plugs changed. Any
possibility one plug in Rotor #2 protruded beyond the housing and
did damage? Not likely. The wear in the photos was on #1, which still had compression. Why does Rotor # 2 have no compression? All I can figure is that by turning it over by hand, I crushed some of the ceramic and it became lodged between the apex seals and the rotor housing. Certainly led me down a rabbit trail to nowhere.
The muffler crap should not have damaged anything
because it would only get into the engine after the nose went down
and the prop stopped.
But on the other hand - you would have had some
power from Rotor # 1 "No stumble, no hiccup, just instant silence" That
indicates to me total failure of fuel or ignition.
Concerning HushPower II mufflers - After Bobby H's.
loss of power I removed my muffler and found the internals failing at about 225
hrs. I removed all the internals and now fly with just the muffler
shell.
Dennis H.