need a no lift prop
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need a no lift prop

  1. #1
    Senior Member f_inscreenname's Avatar
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    Default need a no lift prop

    Looking for a prop for a 4pt hydroplane that will not lift the stern (that pushes the bow into the water). What should I be looking for? From what I understand back when this boat was built (1959) they only used straight pitched props. That sound right?
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  3. #2
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    Quote Originally Posted by f_inscreenname View Post
    Looking for a prop for a 4pt hydroplane that will not lift the stern (that pushes the bow into the water). What should I be looking for? From what I understand back when this boat was built (1959) they only used straight pitched props. That sound right?
    Shouldn't a prop for a flat/runnerbottom be just the ticket? They are designed to have minimal lift.
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    There is no such thing as "stern lift" for a prop. A prop only does one thing
    and that is produce thrust parallel with the axis of rotation. The thrust direction
    or "tilt" in the case of outboards or the down angle portion of non parallel inboard
    thrust can alter the pitch angle of the boat ( bow up or bow down forces )

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  6. #4
    Senior Member ol guy's Avatar
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    Quote Originally Posted by preventec47 View Post
    There is no such thing as "stern lift" for a prop. A prop only does one thing<br>
    and that is produce thrust parallel with the axis of rotation. The thrust direction<br>
    or "tilt" in the case of outboards or the down angle portion of non parallel inboard<br>
    thrust can alter the pitch angle of the boat ( bow up or bow down forces )
    <br>
    WRONG!!!!! certain props have a lift designed into them for different applications. But i just noticed this post is 3 years old
    Last edited by ol guy; 08-03-2017 at 08:41 PM. Reason: add-on

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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by ol guy View Post
    <br>
    WRONG!!!!! certain props have a lift designed into them for different applications. But i just noticed this post is 3 years old
    YOU are correct, Sir...

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