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Let's Talk Cyclecars

Discussion in 'The Hokey Ass Message Board' started by Bigcheese327, Dec 4, 2007.

  1. smarjoram
    Joined: Jun 18, 2010
    Posts: 117

    smarjoram
    Member
    from uk

    brayton engine guy likes this.
  2. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,891

    Ned Ludd
    Member

    A simpler approach would be two crankshafts with one conrod each. Regardless of whether they spin in the same direction or opposite directions, most vibration can be eliminated with a bit of counterweighting.
     
  3. fredvv44
    Joined: Dec 11, 2013
    Posts: 393

    fredvv44
    Member

    Sorry but they don't hit the cyl. wall. This design would work fine. Try drawing it up and you will see.
     
  4. Stretchmobile
    Joined: Oct 29, 2013
    Posts: 108

    Stretchmobile
    Member
    from So Cal

    Since that is the engine in the Mathis, I presume it runs and nothing hits.
     
  5. Marticelli
    Joined: Aug 23, 2012
    Posts: 20

    Marticelli
    Member

    What about providing some dimensions (bore and stroke as well as conrod length for a start). In most conventional engines the conrod just clears the crankcase mouth when the rod/crank angle is 90 degrees where the rod is acting on the plane of the diameter of the bore.

    The twin rods are acting out on a minor chord of the bore which is perhaps 50 or 60 per cent of the diameter, so its hard to see how they could possibly clear the crankcase mouth or the bore unless this is extensively cut away. Perhaps the drawing is just an indication of the arrangement rather than an accurate representation.

    I remain sceptical!

    Marticelli
     
  6. Stretchmobile
    Joined: Oct 29, 2013
    Posts: 108

    Stretchmobile
    Member
    from So Cal

    The drawing came form here: http://thersic.com/wordpress/wordpress/?p=6504
     
  7. Marticelli
    Joined: Aug 23, 2012
    Posts: 20

    Marticelli
    Member

    I already checked out the Mathis web page to which this link is directed. A drawing on this site has been posted here as well as the link but that is not a photograph of an actual engine, nor is it usual practice to scale from drawings in conventional engineering practice - a standard annotation on most engineering drawings states 'Do not scale'!! Maybe someone here has access to an actual Mathis engine or has images of these components in the flesh rather than just as a drawing.

    It may well be that the actual Mathis boxer engine illustrated had a conventional crank like almost every other such boxer engine such as VW, Subaru and BMW motorcycles down the years. I peronally have owned and run many examples of all three, and presently run a 1981 R65 BMW and a 2500 Subaru Legacy AWD. I am also a practising engineer and restorer familiar with the insides of many engines of differing configurations and ages from Victorian to modern. This is why I am so sceptical of believing a drawing which is nice to look at but not for the purpose of constructing these parts. Maybe none of these engines survive...? How many were built?

    Marticelli
     
  8. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Attached Files:

  9. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    marc pic...
     

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  10. robbovius
    Joined: Aug 4, 2013
    Posts: 12

    robbovius
    Member

    W.T.F.

    doesnt mean I don't like it, but...
     
  11. ebtm3
    Joined: May 23, 2007
    Posts: 837

    ebtm3
    Member

    Imagine puling up to the motor vehicle inspection station with that!
    Sorry sir, but that fan on the windmill could shred a pedestrian's nose, and BTW, your tire tread is below minimum depth.

    Herb
     
  12. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,891

    Ned Ludd
    Member

    Is that a hot-bulb semi-diesel?
     
  13. ebtm3
    Joined: May 23, 2007
    Posts: 837

    ebtm3
    Member

    Not if you are talking about the bowler hat atop the pipe. The hot bulb needs to be as close to the combustion chamber as possible, to retain heat from one firing stroke to the next. I suspect that it is a silencer.

    Herb
     
  14. fredvv44
    Joined: Dec 11, 2013
    Posts: 393

    fredvv44
    Member

    The first Steam Punk guy.
     
  15. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    1921 Amilcar CC.4th oldest known.Gasbaloon pics.
     

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  16. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,891

    Ned Ludd
    Member

    I've been trying to crystallize something like "Isayoldpunk" (including a better name, perhaps): sort of Bertie Wooster meets Conan the Barbarian meets '90s European political biker. I'm not even sure it's possible.
     
  17. 64 DODGE 440
    Joined: Sep 2, 2006
    Posts: 4,041

    64 DODGE 440
    ALLIANCE MEMBER
    from so cal

    Perhaps a dim-bulb semi-cyclecar? :p

    All I know is I want to build something like it for a "pit tug". :D
     
  18. fredvv44
    Joined: Dec 11, 2013
    Posts: 393

    fredvv44
    Member

    That is a real gem. I love that nobody restored it.
     
  19. Marticelli
    Joined: Aug 23, 2012
    Posts: 20

    Marticelli
    Member

    For years I have been promoting the notion of recommissioning early machines as discovered rather than restoration, and recently returned a mid 20s OEC motorcycle to running order with minimal restoration.

    The story is at Marticelli
     
  20. fredvv44
    Joined: Dec 11, 2013
    Posts: 393

    fredvv44
    Member

    Oh, beautiful job. I know it takes longer to do it that way but how magnificent. Thanks for sharing that. You can make it run just like a full restoration but still have the caricature of a rescued machine.
     
  21. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Here is the GN/JAP Martyr Instone Special on PreWarCar's( www.PreWarCar.com )stand at Retromobile(Paris) this week.We've seen this car before.It is now owned by Vincent Chamon,owner and organizer of Vintage Revival Montlhery( www.vintage-revival.fr ).Images by Marc and Fred
     

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  22. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Amilcar CGSS with Dutch artist Jan Van Anrooy and his wife Lies.

    From www.Conam.info
     

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  23. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Here's some great shots by Stefan Marjoram ( http://www.STEFANMARJORAM.com ) of one of Duncan's modified GNs. We've seen it before.Here it is being reassembled after some engine repair to it's Curtiss OX-5.
     

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    Last edited: Feb 9, 2014
  24. fredvv44
    Joined: Dec 11, 2013
    Posts: 393

    fredvv44
    Member

    90 HP at 1400 RPM! just high idle in today's world. I love Stefan's photography.
     
  25. bobadame
    Joined: Jan 20, 2009
    Posts: 174

    bobadame
    Member

    Oil consumption: .35 GALLONS/hour.
     
  26. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Derby seen at Retromobile 2014 by Jean-jacques.
     

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  27. Wow Bob, that Derby is fantastic! Are there any more pics out there?
     
  28. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska


    Bill,I know I have posted some here not too far back.
     

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  29. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Avon JAP. Built to accept 500,750,and 1000cc engines for runs at different class records. G.L. pic...
     

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  30. banjeaux bob
    Joined: Aug 31, 2008
    Posts: 5,821

    banjeaux bob
    Member
    from alaska

    Although the Deby is a pretty little car,this one isn't very fast.Think about a '63 Split Window Corvette with a stock 194 cu. in . engine and a Powerglide in it.
     

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    brayton engine guy likes this.

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