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Thread: OMC’s 4-Rotor Wankel Racing Engine - The Real Story

  1. #171
    BoatRacingFacts VIP John Schubert T*A*R*T's Avatar
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    Quote Originally Posted by Tim Kurcz View Post
    Thanks John,

    Thanks for the information. An air cooled engine would be OK, but my FE(850) Mod hydro needs more like 100-115 HP. What do you suppose became of the prototypes?

    Tim
    My hunch is they were destroyed, but like the stacked 4 rotor race motor, you never know what hangs around marine engineering or with former engineering employees. Perhaps John Sheldon or George Miller could shed some light on this.

  2. #172
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    Quote Originally Posted by John Schubert T*A*R*T View Post
    My hunch is they were destroyed, but like the stacked 4 rotor race motor, you never know what hangs around marine engineering or with former engineering employees. Perhaps John Sheldon or George Miller could shed some light on this.
    I believe there are 4 race OMC rotary's still around, maybe even 5 . 2 definately in a private collection. John S. knows more. Could be at least one at BRP, but trying to penetrate the BRP veil is like extracting teeth from a chook aka chicken.

  3. #173
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    Guys: With the demise of OMC and the take over of Marine Engineering by Rotax, I suspect all of the old prototypes have been long since thrown away. Most of the old OMC buildings have been torn down and the places where this stuff was stored went with them. As of last summer, there were 5 rotary race engines surviving; 2 in a private collection and 3 at BRP. I was told when Rotax took over, they ordered all the old OMC stuff to be disposed of. I have also seen a picture of a prototye rotary outboard, but believe it was of a later vintage based on the 650cc engine. Us race guys, both old and new, would like to see some of the racing outboard history preserved and be available for public viewing, but in the production sceem of things, prototype engines like the rotary has little meaning to production outboard history. Rotax has a history in go kart racing so maybe someone there will at least see some of these engines get preserved for public viewing; lets hope so.

  4. #174
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    Quote Originally Posted by Rotary John View Post
    Ken:
    Where in heck did you find that!!!!! It appears to be Tommy Posey in Miami at the introduction. The sound is not of the rotary though. The still shots of the boat alone were made at a different time as they have the fuel caps. \
    Thanks for posting
    John
    At least we know that is not the Rotary Sound.


    The search continues my friend.. I will NEVER give up.


    Ken

  5. #175
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    Wow, thanks so much Mr Finley, at least now I've SEEN one running.

    You are right, that audio most certainly is not that of a 4 rotor wankel. That's a sound you'll never forget once you've been in it's presence. Fortunately audio does exist... unfortunately it's in land-based form:

    Mazda 787B

  6. #176
    Team Member MN1's Avatar
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    I like this one better!
    Mark N

  7. #177
    U.K. J 250 - Euro JT250 Techteam's Avatar
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    Quote Originally Posted by Mark75H View Post
    Sorry, 100 blips of the throttle doesn't do anything for me ... I go with the long whine stretching it out on the straight
    Picky Picky

    Ok I don't want to hijack the best thread on the board but just to convert Mark75H to rotary power:

    http://www.youtube.com/watch?v=upeNfS4sIgU

  8. #178
    Sam Cullis Mark75H's Avatar
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    I didn't say I didn't like rotaries ... I just don't care for the one clip. I like the other one with the car on the track
    Since 1925, about 150 different racing outboards have been made.


  9. #179
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    Quote Originally Posted by Mark75H View Post
    Sorry, 100 blips of the throttle doesn't do anything for me ... I go with the long whine stretching it out on the straight
    The competition complained - therefore they were only allowed to run it on three rotors, hence the funny sound LOL

  10. #180
    Sam Cullis Mark75H's Avatar
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    Not complaining about how it sounds ... what turns me off in that video is that it never runs over idle for more than a half second at a time ... that does not impress me that you are hearing the sound of the motor at speed
    Since 1925, about 150 different racing outboards have been made.


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