"Robinson, Chad" wrote:

You will never destroy a Mazda rotary engine in an airplane
due to over revving.
The prop load will see to that by limiting the RPM. Just
about any Mazda
rotary will rev to 9,000 or 10,000 without damage.

The red line varied from year to year. It is mainly a
function of the rotor
weight and consequently the pressure in the rotor bearing.
The lighter the
rotor and the higher the oil pressure the higher the RPM can be.

Also, I would imagine that at least in aircraft use, heat removal would be 
one of the biggest reasons not to run it too fast - you aren't just 
removing heat, you're doing it over time. The more burns you have per minute, 
the more heat to remove. So I suppose, since I'm putting this in a Cozy, 
I need to be VERY careful planning my radiator layout, but heck, that's
 what about a third of the posts here are about. =)

Thanks for the info,
Chad

The waste heat generated is a function of the HP generated.
Having said that I do want to point out that HP generated is not necessarily
related to RPM. For example a supercharger or turbo charger
can greatly increase the HP at a given RPM.

And yes dealing with the waste heat is one of our biggest problems but it
is the same for any  liquid cooled air craft engine. I notice that
Cool Jugs have been very very quite lately. Perhaps a dose of the
liquid cooled reality has set in.

Paul Lamar
 
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