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  1. #1
    No Money and No Sense sillygolem's Avatar
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    What the heck is this?

    http://gasandrubber.tumblr.com/post/1463418841

    tumblr_lb9uds96M11qcl5oho1_500..jpg

    I'm guessing this was for a speed record attempt and the odd rear end on the Porsche was designed to reduce drag for the following cyclist. Note the nearly wheel-sized front sprocket shield.

  2. #2
    Senior Member Andrew F's Avatar
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    Wonder if he's got a flip flop hub for hills

  3. #3
    Senior Member MikesChevelle's Avatar
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    Quote Originally Posted by sillygolem View Post
    http://gasandrubber.tumblr.com/post/1463418841

    tumblr_lb9uds96M11qcl5oho1_500..jpg

    I'm guessing this was for a speed record attempt and the odd rear end on the Porsche was designed to reduce drag for the following cyclist. Note the nearly wheel-sized front sprocket shield.

    I dont think that is the shield, that is the sprocket its self
    1988 Centurion IronMan "Miami Vice" - 2008 Gary Fisher Genesis
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  4. #4
    Senior Member Chombi's Avatar
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    Uhmmmmm.... THE FORK IS BENT!!!

    Chombi

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    Its a bicycle designed for motor pacing. The initial starting speed is assisted by a motorcycle or automobile. The world record setting for that kind of bicycle began in 1932 and used TA cranks.

  6. #6
    I got 99 projects BluesDaddy's Avatar
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    ^^ I was going to say that the handling must be insanely skittish with the small front wheel and reversed fork.

  7. #7
    Senior Member curbtender's Avatar
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    I don't think the fork is bent. It looks like he flipped it around so he could suck in closer to the car. I'd sure hate to get my pants stuck in that sprocket.

  8. #8
    Old fart JohnDThompson's Avatar
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    Quote Originally Posted by sillygolem View Post
    http://gasandrubber.tumblr.com/post/1463418841

    tumblr_lb9uds96M11qcl5oho1_500..jpg

    I'm guessing this was for a speed record attempt and the odd rear end on the Porsche was designed to reduce drag for the following cyclist. Note the nearly wheel-sized front sprocket shield.
    Google "motor pacing."

  9. #9
    No Money and No Sense sillygolem's Avatar
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    Things are easy to find when you know the right keywords.

    This is from Jean Claude Rude's speed record attempt in 1979. That is the chainring, not the guard. The Porsche was driven by former F1 driver Henri Pescarolo. The bike's rear tire exploded at at 105mph. Rude was unhurt, but he wasn't able to break the world record.

    As for the fork, it was assembled that way at the department store.

  10. #10
    Senior Member randyjawa's Avatar
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    Uhmmmmm.... THE FORK IS BENT!!!
    Of course the fork is bent. Look at the bumper on the car it ran into:-)

  11. #11
    It's MY mountain DiabloScott's Avatar
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    Quote Originally Posted by curbtender View Post
    I don't think the fork is bent. It looks like he flipped it around so he could suck in closer to the car.
    I think they did it like that because the bike handled better when the front wheel touched the bumper. Lots of those motorpace bikes had them that way.
    http://diabloscott.blogspot.com/

  12. #12
    www.theheadbadge.com cudak888's Avatar
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    Look up stayer bicycles of more examples of that sort of fork.

    -Kurt

  13. #13
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    The act of bicycle pacing behind a motor vehicle is traditionally called "staying". The bicyles are refered to as "stayers" and have steep head angles, smaller front wheels and reverse rake forks to allow the cyclist to be closer to the motor vehicle for a better draft. The negative rake actually restores trail lost due to the smaller wheel and steeper head tube.

  14. #14
    Senior Member mudboy's Avatar
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    Alternately, steher.
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  15. #15
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    Quote Originally Posted by sillygolem View Post
    What the heck is this?
    It's what little boys do when real men are doing this: http://www.recumbents.com/wisil/whpsc2010/results.htm

  16. #16
    GONE~
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    Quote Originally Posted by Roll-Monroe-Co View Post
    It's what little boys do when old men are doing this
    Fixed it for you.

  17. #17
    Senior Member tugrul's Avatar
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    Quote Originally Posted by sillygolem View Post
    The bike's rear tire exploded at at 105mph. Rude was unhurt, but he wasn't able to break the world record.
    That explains the Porsche.

  18. #18
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  19. #19
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by sillygolem View Post
    Things are easy to find when you know the right keywords.

    This is from Jean Claude Rude's speed record attempt in 1979. That is the chainring, not the guard. The Porsche was driven by former F1 driver Henri Pescarolo. The bike's rear tire exploded at at 105mph. Rude was unhurt, but he wasn't able to break the world record.

    As for the fork, it was assembled that way at the department store.
    Later motorpaced records were set by John Howard (152mph):
    http://www.canosoarus.com/08LSRbicycle/LSR%20Bike01.htm
    and Fred Rompelberg (167mph):
    http://www.fredrompelberg.com/en/htm...erg/record.asp

    The "reversed" fork adds trail to the frame geometry, which adds stability at speed.

    ... but I do like the "department store" reason.
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  20. #20
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    Quote Originally Posted by sillygolem View Post
    This is from Jean Claude Rude's speed record attempt in 1979. That is the chainring, not the guard. The Porsche was driven by former F1 driver Henri Pescarolo. The bike's rear tire exploded at at 105mph. Rude was unhurt, but he wasn't able to break the world record.
    I believe that's Pescarolo on the right. He never won a Formula 1 race, but did win Le Mans 4 times.

  21. #21
    No Money and No Sense sillygolem's Avatar
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    Jalopnik recently covered this photo:
    http://jalopnik.com/5682223/a-porsch...giant-sprocket

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