how many lbs of thrust is equal to 1 hp?

Discussion in 'Outboards' started by deermaster, Nov 15, 2008.

  1. sandhammaren05
    Joined: May 2009
    Posts: 436
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    Location: Texas & Austria

    sandhammaren05 Senior Member

    It has nothing to do with type of motor. Thrust =
    power output/boat speed = power input/((prop efficiency)x(boat speed)).
    Prop efficiency depends on advance ratio and pitch/diameter. A warning, however, the
    old graphs by (name forgotten) in DuCane's book are not correct.

  2. kerosene
    Joined: Jul 2006
    Posts: 1,266
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    Location: finland

    kerosene Senior Member

    Sandhammaren, you are of course right, despite what almost every E+motor manufacturer claims - but this thread popped up only due to a spam message that has been already removed.
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