On Monday, October 31, 2016 at 3:06:03 PM UTC-4, Duster wrote:
Dave's presentation included reference to a
30% incidence of engine failure (2-stroke?).

To be clear, that includes any failure of the propulsion system,
which can be mechanisms for extension, prop-centering, retraction,
starting, exhaust or structural cracking, etc.
Rarely the core of the engine...

These are not Toyotas, and if you fly like they won't die, you well may.

Hope that helps,
Best Regards, Dave