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

the race is on, prop size needed!

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Old 07-07-2012, 04:04 AM
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kork
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Default the race is on, prop size needed!

i need some help with a prop question, I just purchased a 40 size pole cat and using a os 50 for a powerplant, what is going to be the best prop for speed? Another member raced me last fall with a sundowner 50 size with a evo 52 and beat me up preatty good! I must win! I do have a macs1 piece pipe i may sneak under the cowl for increased rpm and less weight but need a great speed prop.whats your thoughts? I am trying to keep the setup similar to his, I know i could but a Jett engine but it wouldnt be fair.
jason
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Old 07-07-2012, 07:54 AM
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airraptor
 
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Default RE: the race is on, prop size needed!

well a "40 size polecat" doesnt give us any usefull info at all. who makes it? the size, the weight, and so on. A picture would be great. Also the macs muffler i know about doesnt give a RPM gain. MACs does have a 1 piece muffler that does give a little more power over the stock muffler butnot much. Give us a part number for it.

I am think if this is an ARF then it will be a high drag model and need big power to go sorta fast. That OS 50 would work best with a "Red" Jett muffler and a 10x7 prop.
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Old 07-07-2012, 11:59 AM
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Default RE: the race is on, prop size needed!

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ORIGINAL: kork

i need some help with a prop question, I just purchased a 40 size pole cat and using a os 50 for a powerplant, what is going to be the best prop for speed? Another member raced me last fall with a sundowner 50 size with a evo 52 and beat me up preatty good! I must win! I do have a macs 1 piece pipe i may sneak under the cowl for increased rpm and less weight but need a great speed prop.whats your thoughts? I am trying to keep the setup similar to his, I know i could but a Jett engine but it wouldnt be fair.
jason
It has a fast wing but the fuse is wider then it has to be, I guess the same could be said about the sundowner. Fun plane though. I don't know why they don't do the skinny scale thing for speed planes, it would be most appropriate. There is no real need for a 40 sized model to be wider then 2.5 to 3 inches.
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