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

prop for a JBA 91 on a keecat???

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Old 06-13-2007, 08:16 PM
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Default prop for a JBA 91 on a keecat???

guys i was wondering what prop you gys are using on your 91 engines for speed?

Thanks,
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Old 06-13-2007, 10:13 PM
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Default RE: prop for a JBA 91 on a keecat???

the trick is to find a Pusher prop... zinger wood 14x8p cut to 13.5 or 13"
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Old 06-16-2007, 11:30 PM
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Default RE: prop for a JBA 91 on a keecat???

i didnt really want to cut it so i ordered a 11x8...i hope that is fine. Also are wood props good for speed?
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Old 08-25-2007, 09:42 AM
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Default RE: prop for a JBA 91 on a keecat???

hi boys , i have a jba 91 that i have put on a u can do 60 , we broke the engine in but we cant get it to run correctly ,, we can get the bottom and the top end singing but we cant get the middle range right , or we get the middle right and then the top and bottom suffers , either way this results in (( DEAD STICK )) , literally after onli a 1 or 2 mins at most , soon as you power down throttle it dies ,,, im running it on duraglow 10 , the specs are for a 10 % mix ,, any ideas anyone before i throught the darnd motor in the garbage and beg / steal or borrow to get another motor ,, thanks guys
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