Making an Engine Out of Scrap

Discussion in 'All Things Boats & Boating' started by confused, Mar 17, 2009.

  1. marshmat
    Joined: Apr 2005
    Posts: 4,127
    Likes: 149, Points: 63, Legacy Rep: 2043
    Location: Ontario

    marshmat Senior Member

    Mike,

    A flywheel does not increase torque or power. All it does is to lengthen the time constant for the shaft speed to respond to a change in load.

    A crankshaft needs some rotational inertia, otherwise it would speed up with every power pulse and slow down on every compression stroke. Hence, a flywheel. If the engine doesn't need a flywheel to run, there's not much point in adding one.
     
  2. Landlubber
    Joined: Jun 2007
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    Location: Brisbane

    Landlubber Senior Member

    well that is technically correct of course marshmat,
    Torque = Hp x 5252 / Rpm (5252 is a constant)
    but the inertia would be what I think he really referrs to, most people think along those lines.
     

  3. mydauphin
    Joined: Apr 2007
    Posts: 2,164
    Likes: 53, Points: 48, Legacy Rep: 575
    Location: Florida

    mydauphin Senior Member

    Does that mean that at 5252 rpm - 1 torque is equal to 1 hp
     
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