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    three blade 15/19

    Who tried 15/19 three blade prop in a rxpx, Do u think it will buck easier with the 3 blade prop spin it 9000 rpm. I know i'll lose some topend speed but i'll gain faster acceleration.


  2. #2
    R88ory RXP's Avatar
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    Quote Originally Posted by FAST RXP View Post
    Who tried 15/19 three blade prop in a rxpx, Do u think it will buck easier with the 3 blade prop spin it 9000 rpm. I know i'll lose some topend speed but i'll gain faster acceleration.
    Not sure on the buck issue but i think you will hav a hard time getting that prop to 9000rpm unless you have BIG power. Yes your accel will be much better. R88

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    BlackHawk's Avatar
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    Quote Originally Posted by R88ory RXP View Post
    Not sure on the buck issue but i think you will hav a hard time getting that prop to 9000rpm unless you have BIG power. Yes your accel will be much better. R88
    Yup that is a big prop to turn.

  4. #4
    Quote Originally Posted by BlackHawk View Post
    Yup that is a big prop to turn.
    If i can turn a 15/22 @9000 rpm, I should be making some power?

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    richrxp's Avatar
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    Most likely you will loose around 100-200 rpm's.
    A little tweaking on the 15/19 ,and you will be ok i think.
    But that's a guess,a testride does the job.

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    I"ve been told you will buck easier with a 3 blade as it's not processing as much water as the 4 blade.

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    REID2168's Avatar
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    Quote Originally Posted by FAST RXP View Post
    Who tried 15/19 three blade prop in a rxpx, Do u think it will buck easier with the 3 blade prop spin it 9000 rpm. I know i'll lose some topend speed but i'll gain faster acceleration.

    Jimmy/Frank.........will the 3 blade bring about the buck sooner........YES..........will 9000 rpm's keep it from happening as fast.............YES...............can your boat turn that 3 blade prop pitched correctly @ 9000 rpm's.................YES.........will it accellerate better ......YES............will it loose a bit of top end........YES.............. good luck guys keep us advised!

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    R88ory RXP's Avatar
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    Quote Originally Posted by FAST RXP View Post
    If i can turn a 15/22 @9000 rpm, I should be making some power?
    Yeh no doubt, Just to give you an idea I went from a re pitched 15/20 4 blade that had been bent to 13/21 to a three blade 14/18 and kept the same rpm. 8150 wot. The three blades are alot harder to spin, you might want to consider the 14/18 or you will most likely have to have some pitch taken out of prop to get your rpm up to where you want them. R88

  9. #9
    westy's Avatar
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    so your saying a 3 blade is harder to spin then a 4 blade.... will a 3 blade have more lets call it bite then a 4 blade and caviate less in general??

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    R88ory RXP's Avatar
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    Quote Originally Posted by westy View Post
    so your saying a 3 blade is harder to spin then a 4 blade.... will a 3 blade have more lets call it bite then a 4 blade and caviate less in general??
    Yup, the difference is really big but you do lose a bit of topend. Its not that it is harder to sping but in general if you had a 15/20 four blade it would rev harder than a 15/20 three blade. R88

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