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

  1. #181
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    Well Sam, I did see and hear them at Paris - spine chilling stuff. OMC always seemed to be good for weird surprises in the racing environment, starting off with the GT115 and the loop charged 3-cylinder, continuing with the Stranglers, the CC and CCC, the Wankel and the V8s. Always a technological tour de force, with astonishing improvisation skills successfully applied to engineering.
    After all, no outboard manufacturing company ever had the financial means of the giants in the automobile industry.
    Being an engineer as well as a trained engine builder, I did enjoy live all of the above race engines, but only raced the 3-cylinder myself, in SE form. However, when I saw Angelo Vassena`s OE at Brodenbach, my eyes really opened wide!
    I still have about five shoe-boxes full of docs and photos to scan and send to BRF. Might need some assistance with dating the lot. rgds.

  2. #182
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    Bring it on Wolfgang, we sure would like to see everything you've got. Do you have any audio or "video" of the Rotary's... Very Very RARE. The one I have posted took years to find. It would be GREAT to hear one at full song.

    Kind Regards Ken

  3. #183
    Burgess/Evinrude F1 V8 Lars Strom's Avatar
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    Default PARIS Six Hours 1974

    I think this very nice picture should be on this thread..
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    Lars Strom

    Life is good





    Check my own racing history at BRF...http://www.boatracingfacts.com/forum...ead.php?t=6727

    My racing web site SVERA.se....http://svera.se/blogg/paris-6-hours/

  4. #184
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    Default Rotary Conversion

    Quote Originally Posted by Techteam View Post
    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
    Do you mean something like this?

    Tim
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  5. #185
    Sam Cullis Mark75H's Avatar
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    Quote Originally Posted by Mark75H View Post
    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
    No need to convert me. I loved my cousin's Mazda the first time I rode in it back in the mid-70's.

    I was not impressed with the "race" car at idle ... a waste of inconvenienced electrons.
    Since 1925, about 150 different racing outboards have been made.


  6. #186
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    Quote Originally Posted by Mark75H View Post
    No need to convert me. I loved my cousin's Mazda the first time I rode in it back in the mid-70's.

    I was not impressed with the "race" car at idle ... a waste of inconvenienced electrons.
    The 20B rotary "brap" isn't much different than the thrashing idle of a roller cam small block, or the rythmic surge of an idling blower motor....... All tell a story of enormous power about to be unleashed!

    Tim

    BTW: Always especially liked the "cackle" of a Merc 2 liter at idle...

  7. #187
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    Many thanks Lars. Great photo - Jimbo and Renato. Looks like the boat in which Renato won the European championship in Guels on the Mosel river (near Koblenz) in about 1972. I still have a (soundless) videoclip of some of the heats. Completing the first lap, Renato almost lost it getting round the pit buoy.

  8. #188
    U.K. J 250 - Euro JT250 Techteam's Avatar
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    Quote Originally Posted by Tim Kurcz View Post
    Do you mean something like this?

    Tim
    Like it, who balanced it ?

  9. #189
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    Quote Originally Posted by wolfgang View Post
    Many thanks Lars. Great photo - Jimbo and Renato. Looks like the boat in which Renato won the European championship in Guels on the Mosel river (near Koblenz) in about 1972. I still have a (soundless) videoclip of some of the heats. Completing the first lap, Renato almost lost it getting round the pit buoy.
    If you are refering to the picture of the rotary passing the Merc, that is Barry Woods driving the rotary who co-piloted with Jimbo. The Merc driver is Billy Seebold. They lead the race for 5 1/2 hrs until engine failure caused by sabotoge.

  10. #190
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    Quote Originally Posted by Tim Kurcz View Post
    Do you mean something like this?

    Tim
    Looks like someone has stacked Mazda parts on top of a piece of plywood with OMC carbs bolted on. If you look close, the gearcase isn't connected to anything and a rotary has a crank in the center of the package which in this picture doesn't line up with the gearcase shaft.

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