50 HP rotary, "To pony or not to Pony ?" That........ - Page 2
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  1. #21
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    railroad ties.

  2. Likes 1yesca liked this post
  3. #22
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    Sep 2006
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    Quote Originally Posted by jim rozen View Post
    Basically just size this up by a factor of ten. 5 -> 50 and 0.125 -> 1-1/2 and then give it a try and see how it does.

    (you probably want to replace the 2x4s with 6x6 timbers...)

    I've always liked this picture and the simple solution to a problem. The OP is asking whether he should use a pony start for a 50 hp idler? LOL

  4. #23
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    The 30hp I built years ago started just fine with a 3/4 hp TEAO motor that was belted to it so that it would over speed the idler a bit. A timer would shut down the starter motor, let the idler coast down to near perfect synchronous speed, then a contactor would apply L1-L2 to the idler. The timer could be fine tuned to get the coast RPM just right, so no large inrush or crow baring to achieve synchronous speed. Worked great, simple. No one way clutch or "cam" required.


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