Thanks Thanks:  0
Likes Likes:  0
Page 5 of 31 FirstFirst 1234567891011121314151617181920212223242526272829 ... LastLast
Results 41 to 50 of 310

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

  1. #41
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
    Join Date
    Aug 2006
    Location
    New South Wales, Australia
    Posts
    126
    Post Thanks / Like

    Default


    1. Jimbo at Parker, first lap waving to the crowd. The wake behind him was Posey. 15:17 gearcase


    2. Tommy Posey at Provo Utah. 14:23 gearcase


    3. Tommy Posey at Miami Marine Stadium at press introduction before Parker. Note no fuel filler caps the boat rear shroud. 15:17 gearcase


    4. Tommy Posey at Provo, Utah. Look carefully, nothing in the water, he was really flying. 14:30 gearcase


    5. Very early press photo; note vertical "Johnson" 15/17 gearcase


    6. OMC Engineering boat dock. Mike Kukla (died 1975) behind engine, Harold "Mouse" Wade. Note the cut off exhaust exit and the black spacer between the 15:17 gearcase and the bucket. This was a V-4 gearcase modified for the rotary. Later in the program a new gearcase casting was made for the 14/23.


    Many thanks to John Sheldon aka 'ROTARY JOHN' on BRF for providing most of the above literature.

  2. #42
    Team Member
    Join Date
    May 2009
    Location
    Metter, Ga.
    Posts
    160
    Post Thanks / Like

    Default Pictures

    1. Jimbo at Parker, first lap waving to the crowd. The wake behind him was Posey.
    2. Posey at Provo
    3. Posey at Miami Marine stadium at press intro befor Parker. Note no fuel filler caps the bost rear shroud.
    4. Posey at Provo. Look carefully, nothing in the water, he was really flying.
    5. Very early press photo; note vertical "Johnson" 15/17 gearcase
    6. OMC Engineering boat dock. Mike Kukla (died 1975)behind engine, Harold "Mouse" Wade. 14/23 gearcase used at Provo. Note the cut off exhaust exit and the black spacer between the gearcase and the bucket. The was a V-4 gearcase modified for the rotary. Later in the program a new gearcase casting was made for the 14/23.

  3. #43
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
    Join Date
    Aug 2006
    Location
    New South Wales, Australia
    Posts
    126
    Post Thanks / Like

    Default













    Many thanks to John Sheldon aka 'ROTARY JOHN' on BRF for providing the above literature.

  4. #44
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
    Join Date
    Aug 2006
    Location
    New South Wales, Australia
    Posts
    126
    Post Thanks / Like

    Default

    DYNAMOMETER Testing












    A later DYNOMOMETER SHEET showing 313 propshaft horsepower @ 10500rpm with 217 crankshaft ft Lbs of torque @ 5000rpm

    Many thanks to John Sheldon aka 'ROTARY JOHN' on BRF for providing the above literature.

  5. #45
    Sam Cullis Mark75H's Avatar
    Join Date
    Nov 2004
    Location
    Annapolis, MD USA
    Posts
    4,507
    Post Thanks / Like

    Default

    I don't know why, but sometimes Webshots won't let me open the images full size, other times it does.

    Any way ... If Ken would be kind enough to email me the original scans, I can improve a lot of them like this:

    Attached Images Attached Images    
    Last edited by Mark75H; 05-20-2009 at 07:38 AM.
    Since 1925, about 150 different racing outboards have been made.

  6. #46
    Team Member
    Join Date
    Jan 2005
    Location
    Scottsdale, AZ
    Posts
    437
    Post Thanks / Like

    Thumbs up OMC Rotary

    Hi Ken- Did OMC ever state what HP the engines pulled on the dyno?
    Ye Olde Desert Geezer Al

  7. #47
    Sam Cullis Mark75H's Avatar
    Join Date
    Nov 2004
    Location
    Annapolis, MD USA
    Posts
    4,507
    Post Thanks / Like

    Default

    Quote Originally Posted by Allen J. Lang View Post
    Hi Ken- Did OMC ever state what HP the engines pulled on the dyno?
    Ye Olde Desert Geezer Al

    OMC never released it during the program, but John has it in the text on this thread ... the early versions made 265+ and the later versions made 280+
    Since 1925, about 150 different racing outboards have been made.

  8. #48
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
    Join Date
    Aug 2006
    Location
    New South Wales, Australia
    Posts
    126
    Post Thanks / Like

    Default

    Quote Originally Posted by Allen J. Lang View Post
    Hi Ken- Did OMC ever state what HP the engines pulled on the dyno?
    Ye Olde Desert Geezer Al

    Here is a Dyno sheet from John Sheldon aka "ROTARYJOHN" here on BRF. He has provided almost all the info here so far.

    CLICK & go to "FULL SIZE" make it bigger.



    I read it as 313hp propshaft & 10500rpm. (without nitrous) I think that if you add nitrous it adds 30%.

    BUT thats only half the story. As Charlie Strang said, NEVER BUY AN OUTBOARD ON HORSEPOWER ALONE. TORQUE in the key and the ROTARY had that in abundance.

    Many thanks to John Sheldon aka 'ROTARY JOHN' on BRF for providing the above literature.
    ================================================== ========

  9. #49
    - Skoontz's Avatar
    Join Date
    Apr 2006
    Location
    Encinitas, California
    Posts
    1,909
    Post Thanks / Like

    Default 3 grunts and one word

    Arrrrrrrrrrrrrrrrrr Arrrrrrrrrrrrrrrrrrrrrrr Arrrrrrrrrrrrrrrrrrrrrrrr!!!!!!!!!

    POWER!
    Bill Schwab
    Dirty Deck Brewing
    Company

  10. #50
    Burgess/Evinrude F1 V8 Lars Strom's Avatar
    Join Date
    Jan 2008
    Posts
    1,615
    Post Thanks / Like

    Default

    I really enjoy reading about the history of the Rotary and OMC.
    Been a big part of my life and I started to race when all this took place.

    Thanks so much John, Ken and Boatracingfacts to make it happen..

    By the way, I translate everything and put it on
    www.Boatlife.se in Sweden
    so more people can take part of this unique story..

    Maybe the old Rotary could win a modern F1 Boatrace!!
    Attached Images Attached Images  
    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/

Page 5 of 31 FirstFirst 1234567891011121314151617181920212223242526272829 ... LastLast

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 guests)

Similar Threads

  1. Trivia
    By Mark75H in forum BRF Open Discussion
    Replies: 71
    Last Post: 07-02-2009, 05:21 AM
  2. 2008 Blue Water Resort and Casino 300 Enduro Rules
    By Ron Hill in forum Outboard Racing History
    Replies: 3
    Last Post: 01-20-2009, 12:53 PM
  3. 850 Sci
    By Ron Hill in forum Offshore History
    Replies: 1
    Last Post: 02-18-2005, 08:41 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •