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

best prop for os surpass 70

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Old 06-22-2004, 04:24 PM
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tigil
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Default best prop for os surpass 70

i have a Super Sporster mkII 40 with a os 70 ; i try a master airscrew 12x8 but with it my engine run 11,000 rpm on the ground.
and I cannot put one 13 inches because my landing g is too low. Does a buddy of my club advise me a APC 12x9 wide what you thinks about it?
according to councils' that J had, my engine do not have to turn more than 9500
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Old 06-22-2004, 11:18 PM
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Default RE: best prop for os surpass 70

Sort of the wrong area for this question. An FS 70 on a Super Sportster is definitely not an extreme speed plane but anyways ...

Try a three blade. The general rule for three blades is down an inch in diameter from 2 blade, or up 2" of pitch. 4 strokes love 'em, btw, plus you get the ground clearance you need and as an added bonus they look spiffy. Master Aircrew makes a 12x8 three blade that would be prefect for your engine. I've used it on a Saito 65 myself with very good results.

I currently run a 10x4 Grish three blade on an old OS FS40 Surpass / Kadet Seniorita as well as a 13x8 MAS on my Enya 90 FS / 4*60. I've been thinking of trying an 8x6 on an OS20FS I have mounted on my Lazy Bee.


http://www.rcsites.net/sport_flyer/
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Old 06-23-2004, 04:49 AM
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Default RE: best prop for os surpass 70

thank you for your patience and I know that my text N is not very clear bus J uses a translator because I am French-speaking
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