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Props

Old 09-22-2010, 09:23 AM
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Rustler 3.3
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Default Props

how do i tell how fast a prop will go?
Old 09-22-2010, 12:55 PM
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Justaddwata
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Default RE: Props

Only proven way - run it. Might sound obvious - but it is true
Old 09-23-2010, 08:56 AM
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Ron Olson
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Default RE: Props

You can use a formula but like Matt said, run it!

Pitch times RPM minus 15% for slippage will get you in the neighborhood. This is really flawed unless you have the proper equipment as manufacturers give out false RPM numbers to one-up the competition. Load of the prop can also knock down the RPM as well as the weight and type of hull. Test different props until you find one that the boat likes.
Old 09-24-2010, 12:58 AM
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gtopillado
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Default RE: Props

Tach and GPS.
Old 09-24-2010, 06:53 AM
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Default RE: Props

You can't just throw on a prop and go and the one's that others use might not be what you need, since there are several different variables. When ever you change props the tune of the engine will change from the load of the prop...so adjusting pipe lenght, trim angle, carb settings will need to be considered to be able to acheive the optimum performance from any given prop...some props will be better than others . That is why we have over 50 different props for dialing in and setting up. A tach and gps / radar are helpful for prop selection.

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