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Thread: Omc Roto Race Motor

  1. #41
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    Default Gearcase rotation

    I don't rightly remember for sure, but the engine rotated clockwise, same as the V-4 and V-6. The guts in the gearcase were all the same for any of them.
    I don't recall any of the guys complaining about steering torque, but it did have tons of power and engine torque. I remember Barry Woods drove the rotary at Provo for the first time in a race. He broke the motor, but his comment when we pulled him back to the trailer was " WOW, what a ride"

  2. #42
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    Definately Left Rotation on this gearcase John. What case is this & what size prop usually on low ratio case & high ratio case.



    ================================================== ===============

  3. #43
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    Default gear case rotation

    Ken:
    Yea that prop is LH, but if you look at some of your other picture they show RH. The picture of Barry Woods putting in at Paris, the unit at OMC. I don't think there was a difference in rotation between the 2 gearcases. I don't know what size props were used. Don Henrich (OMC) custom made the props. Mike Galtney or Ziggy may know. Mike also told the story about rebuilding an engine in the hotel at Provo.

  4. #44
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    Default Ziggy?

    Is Ziggy on this forum?
    Bill Schwab
    Dirty Deck Brewing
    Company

  5. #45
    Sam Cullis Mark75H's Avatar
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    Quote Originally Posted by Skoontz View Post
    Is Ziggy on this forum?
    No, but maybe some of his friends could invite him
    Since 1925, about 150 different racing outboards have been made.


  6. #46
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    OMC’s 4-rotor Wankel Racing Engine - The real story

    As told by John Sheldon - Former OMC rotary engineer


    http://www.boatracingfacts.com/forum...newpost&t=8780

  7. #47
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    Quote Originally Posted by John Schubert T*A*R*T View Post
    The bottom rotor/troquoid(splg?) bolted directly to the gearcase, probably through an adaptor. This created a problem as sitting in the water waiting to start, this rotor was essentially under water. So Leek & company designed/rigged a fuel pump to act as a pump to keep water out while running. Don't recall what they did while just sitting.
    Look at the picture above. There was 3 plastic plugs in the bucket. The 2 inline towards the back were to axcess the bottom 2 carb's jets. The one on the side was to axcess the bottom plug. It indeed had a pulse pump to empty any water that got in, but the bucket was waterproof and very little water ever got in; unless the driver dumped it. The 2 brass tubes in the rear of the bucket were exhaust relief, for starting because at rest the bottom 2 rotors were below water. Read the story just posted.

  8. #48
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    I think I found this unit. It indeed was a photo only mock up and never had a powerhead in it.

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