"Dave S" wrote:
Can I interest you in the Mazda Rotary line of power? Very few
catastrophic failure modes...

Don't get me wrong: I love the Mazda (more properly "Wankel"), too. But the
single most common causes of engine failure apply to it as well: fuel
problems. And because every Wankel installation is a unique experimental
installation, it is perhaps more at risk of problems than your
run-of-the-mill Lycoming installation.

As best as I see it, there's only one certain way to avoid engine or prop
failu fly a glider!

Russell Kent