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4500rpm propeller to negate the PSRU

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pfarber

Well-Known Member
Joined
Feb 21, 2019
Messages
1,064
Location
Dollywood
I've been reading that quite a few airplanes are swinging much smaller props much faster... 4000rpm and above and still seeing good cruise speeds.

Sensetech and Warp drive make 4000rpm props for the Rotax and the performance charts look decent:

https://www.propellor.com/Content/I...cles/CFC/Airmaster AP332 WD to WW upgrade.pdf

Air racers also seem to live quite well with high rpm/small diameter props.

Rough numbers would be a 45-50 inch prop (I know, crazy tiny when compared to engines turning half the RPM)

Does anyone have any info to point me to regarding successes and failures along this line? A PSRU is all of 30lbs so it not really sure the effort is worth then weight savings or trouble to find such a unique propeller.
 
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