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

OS25 prop

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Old 07-20-2007, 11:00 AM
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t_driver
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Default OS25 prop

We are doing alittle sport racing at the club i belong to I got a Q500 with a OS25 i know its small but for the older guys we didnt want them as fast .What would be a good prop for this motor? Highest rpm i got out of it was 13,500 with a apc 8x8 is that about all im going to get?
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Old 07-20-2007, 11:39 AM
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The Internet Killer
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Default RE: OS25 prop

25 FX ??
25 LA ??

It does make a difference .
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Old 07-20-2007, 12:08 PM
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Default RE: OS25 prop

Thats about all you can/should expect unless you put a pipe on it. Jett makes one for about $50. Most of the .25 size racing I am aware of specifies the prop too.
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Old 07-20-2007, 01:02 PM
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Default RE: OS25 prop

I've found that since you are doing turns, accelerating, turning, etc.... It's best to get a prop that will do both top speed and turning. Get a few props and test them on the course... You might fing a 8X7 or a 9X6 better, maybe even a 10X5... you won't know until you try them and get some lap times...
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Old 07-20-2007, 01:25 PM
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daven
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Default RE: OS25 prop

APC 7.8x6 was the fastest prop we found (16k+)
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Old 07-20-2007, 09:59 PM
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Default RE: OS25 prop

Try the different props. Differences in elevation, temp, fuel types, and flying style will call for different props.
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Old 07-25-2007, 07:53 AM
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Default RE: OS25 prop

Thanks guy i tryed a 8x6 apc and was getting 15,600 out of it oh by the way it the 25 fx ..
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