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Propellor thoughts

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Dust

Well-Known Member
Joined
Feb 9, 2004
Messages
302
Location
Troy, Michigan
ok, in general terms, prop tip speeds are limited to 80 or 90% of the speed of sound.

I know the plane will indicate 210 MPH at 6000 feet, been there, done that. I know what in theory an indicated 200 will true out to at 25000, all great numbers.

I am planning at cruising at full cruise power at 25000 feet. No actually, i am planning to turbo to full power at 25000 and will probably have full cruise power to 30000.

So here is my question, as the air thins the speed of sound goes down, so at 25 to 30 thousand feet the speed of sound is less, does this mean i will no longer be able to run 2800 RPM full climb power or 2400 RPM, full cruise power at those altitudes???????

Can you compensate for this by adding pitch to the prop and slowing engine RPM?

Or am i all wet and should start building a snow mobile, for those of you who don't know, a vehical most think we need in SE michigan 10 months a year and which i have never been on.

I could make a cozy snow mobile that really flies.

enjoy the build

dust
 
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