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Thread: Prop pitch ...

  1. #1

    Prop pitch ...

    I've heard lots of info about it. I know how it works on a regular prop, but the 14/19 throws me off.

    From what I've read, 14 is the leading edge pitch, 19 is the trailing edge pitch. What difference does it make on the leading and trailing? If I move the from up to a 15 and leave the back at 19, what's that gonna make the ski do?


  2. #2
    scooby-rxp-doo's Avatar
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    keeping the 19 as the trailing edge will/should keep your top end the same.

    But putting a 15 pitch in as a leading edge..hmmm....I would have thought you ski would lose low end punch.

  3. #3
    So you can pitch a prop to have top end but loose low end ?
    Scooby your RXT can run a solas at 14/19 pitch ?

  4. #4
    Denali44's Avatar
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    Will repitching, help a stock ski?

  5. #5
    So ... if I pitch it 12/19, what would be wrong with that?

  6. #6
    GTXX's Avatar
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    going up some on the leading edge pitch is the way to cure cavitating when nailing it at a dead stop. If you blow out the prop it can help the holeshot greatly.

  7. #7
    Up numerically? So .... it I take the 14/19 and make it a 15/19, that will improve holeshot?

  8. #8
    GTXX's Avatar
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    going up numerically CAN improve holeshot IF you are cavitating the prop from a dead stop or very low speed. Typically the lower number and pitch gives the better holeshot but if the prop is not taking a big enough of a bite and slipping with a low number, pitching up will help. My ski would blow out a concorde 15/20 horribly from a dead stop, bent the leading edge of the blades up some, measuring each blade carefully in three different spots with a dial indicator while set up in a pump. Pulls out of the hole very hard now, no more cavitating.

  9. #9
    Okay ... so does the trailing end only have to do with the top end?

  10. #10
    scooby-rxp-doo's Avatar
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    Quote Originally Posted by Kinchyle
    So you can pitch a prop to have top end but loose low end ?
    Scooby your RXT can run a solas at 14/19 pitch ?
    Seems to do it very well... Consistantly out-dragged every other RXT at our recent radar day in the UK by 1.5-2mph

    Have no dashboard display at the moment due to a loom problem, so cannot comment on revs.

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