Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Efficient small props.

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Old 03-02-2008, 07:24 PM
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cyclops2
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Default Efficient small props.


I am building a 36" Martin Mars 4 engined flying boat. It will have 4 Hyperion 12 mm diameter inrunners, KV of 4100.
Mfgr. tested with a GWS 3 x 2 prop. It turned 22,560 rpm. It pulled 3.7A @ 7.3 V = 27 watts. WOT is calculated @ 42 mph.

Are there more efficient props made in the 3" size ?

Rich
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Old 03-02-2008, 10:50 PM
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z06kal
 
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Default RE: Efficient small props.

Not sure what you are trying to acomplish??? Can you post some pics of your project? Look at APC-E props they are some of the most effecient props out there.
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