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Thread: Race chassis

  1. #1426
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    Quote Originally Posted by layton View Post
    i have an obsession with the large BMW and Guzzi engines. something about them....
    Engines pointing in strange directions at odds with convention?
    if you like CX hondas as well you might have a problem
    They all do have a symmetry that's appealing to the eye.



    Kinky is using a feather. Perverted is using the whole chicken

  2. #1427
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    Quote Originally Posted by husaberg View Post
    Engines pointing in strange directions at odds with convention?

    Yep.....i do seem to like unusual things. maybe its relate-able?

  3. #1428
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    Don't forget the Lambretta 250GP L-twin



    One of Phil Aynsley's great photos from

    https://www.motorcycleclassics.com/c...r-zm0z17ndzhur

    cheers,
    Michael

  4. #1429
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    Quote Originally Posted by Michael Moore View Post
    Don't forget the Lambretta 250GP L-twin



    One of Phil Aynsley's great photos from

    https://www.motorcycleclassics.com/c...r-zm0z17ndzhur

    cheers,
    Michael
    Better than their other attempts.
    https://www.kiwibiker.co.nz/forums/s...post1130430283



    Kinky is using a feather. Perverted is using the whole chicken

  5. #1430
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    FYI, Tony Foale is having a short sale on his chassis book/software bundles per this email that I got a few hours ago:

    Since the beginning of March the checkout on our website has not been working correctly due to an automated update of the web software. I think that the problem has now been fixed. So if you had a problem please try again now.
    To celebrate the problem being fixed we are offering an extra 10% discount on all of our bundled products for one week from today. So even if you were not affected by the problems, now is a good time to order.

    Go to https://motochassis.com
    cheers,
    Michael

  6. #1431
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    13th June 2010 - 17:47
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    Almost the first 100 pages - and I'm referencing page one...

    Plate frames.
    Has anyone seen any information on plate thickness used ?
    In theory, the side members could be pretty thin and still be adequate for beam strength - but less so for torsional loadings.
    As usual it's a tradeoff, the thinner the side members, the more important the bulkheads become.
    And yes, I'm considering one. Just because I can, LOL.

    Thanks

    Greg
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  7. #1432
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    Quote Originally Posted by Grumph View Post
    Almost the first 100 pages - and I'm referencing page one...

    Plate frames.
    Has anyone seen any information on plate thickness used ?
    In theory, the side members could be pretty thin and still be adequate for beam strength - but less so for torsional loadings.
    As usual it's a tradeoff, the thinner the side members, the more important the bulkheads become.
    And yes, I'm considering one. Just because I can, LOL.

    Thanks

    Greg
    yip..............
    Built like a wing
    but why not use the same materials as a wing
    that m Board that the segale and the heron and ohters used is still used in planes (well modern version
    Fits fro his bike use 2mm ms
    Norton for the SS monocoque used some rear thin material as well.

    They have wonderful strong glues and flush rivets these days.

    Eric Offenstadt. did wonderful looking creations
    Click image for larger version. 

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    Kinky is using a feather. Perverted is using the whole chicken

  8. #1433
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    If you are meaning just plate frames
    Click image for larger version. 

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    the beauty of these would be the bits you can cut out double up and easily alter
    Not only that woth the cross tubes you can move around the bracing and i think you can get big rivets like those eyes on tarpaulins



    Kinky is using a feather. Perverted is using the whole chicken

  9. #1434
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    I've seen a couple of these 'plate frames' in action. Without a proper closed-box construction they had the torsional stiffness of a wet newspaper.
    Click image for larger version. 

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  10. #1435
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    Quote Originally Posted by Frits Overmars View Post
    I've seen a couple of these 'plate frames' in action. Without a proper closed-box construction they had the torsional stiffness of a wet newspaper.
    Click image for larger version. 

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    Thanks Frits - I'd had that suspicion. I haven't seen a pic of one with what I'd consider proper bulkheads.
    And when you factor in proper load bearing bulkheads, eventually you come up with a full monocoque.
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  11. #1436
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    Quote Originally Posted by husaberg View Post
    I had this Dave brought them up on a previous thread they belong here more then the 2 stoke thread.

    interesting stuff bellow the breasts as well 3 vs 5 spokes alloy vs carbon fibre why the original Astralights were stopped, solid vs spoked etc
    Random click of the day - happy. Epic boobs.
    In the white room, with black curtains, at the station

  12. #1437
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    Quote Originally Posted by HenryDorsetCase View Post
    Random click of the day - happy. Epic boobs.
    Reminds me of that episode of Seinfeld.

    To be fair my main motivation was the story was pretty decent as well to be fair.
    3 spoke vs more etc.



    Kinky is using a feather. Perverted is using the whole chicken

  13. #1438
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    Quote Originally Posted by Frits Overmars View Post
    I've seen a couple of these 'plate frames' in action. Without a proper closed-box construction they had the torsional stiffness of a wet newspaper.
    Click image for larger version. 

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    I was looking at that and wondering if the engine had to be a stressed member for it to work properly.... but if you think of the long lever attached a the steering head and swingarm even those hefty pipes don't look like enough.
    In the white room, with black curtains, at the station

  14. #1439
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    Quote Originally Posted by HenryDorsetCase View Post
    I was looking at that and wondering if the engine had to be a stressed member for it to work properly.... but if you think of the long lever attached a the steering head and swingarm even those hefty pipes don't look like enough.
    It certainly doesnt look look a stressed skin or does it looj thick enough sections or enough struts the one on the first page is what it should look like.
    But something like the Ciba Geigy M board one looks far cooler.

    https://www.kiwibiker.co.nz/forums/s...post1130268943



    Kinky is using a feather. Perverted is using the whole chicken

  15. #1440
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    Quote Originally Posted by HenryDorsetCase View Post
    I was looking at that and wondering if the engine had to be a stressed member for it to work properly.... but if you think of the long lever attached a the steering head and swingarm even those hefty pipes don't look like enough.
    Well, if you think a "normal" tube frame doesn't look stiff enough, don't look at Tony Foale's early spine frames for TZ's....
    But they worked. With the tyres of the time.
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