anyone know what these flywheel bits are made of?? | FerrariChat
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anyone know what these flywheel bits are made of??

Discussion in '348/355' started by mad dog, Jan 16, 2015.

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  1. mad dog

    mad dog Formula Junior

    Jan 5, 2006
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    andrew
    #1 mad dog, Jan 16, 2015
    Last edited by a moderator: Sep 7, 2017
    Hi All
    inside the 348 and 355 flywheel damper system we have the little plastic end pieces at the end of the springs, see pic
    now we all know they are plastic but anyone know what?
    I'm getting them re manufactured and need an idea of the strength of material needed.
    Image Unavailable, Please Login
     
  2. bosshog8

    bosshog8 Formula Junior

    Mar 13, 2011
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    Demetrius
    #2 bosshog8, Jan 17, 2015
    I don't know what they are made of but they have a resemblance to nylon (just a guess). The real reason I'm replying is to suggest if you get these made then then make the other bits as well, including the squiggly spring spacer bits that run the length of the spring. If you make all the bits and sell them as a complete kit then I would be interested. Please keep us informed if this happens.
     
  3. mad dog

    mad dog Formula Junior

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    #3 mad dog, Jan 17, 2015
    Will do!
     
  4. fdekeu

    fdekeu Formula Junior
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    #4 fdekeu, Jan 18, 2015
    Probably one of these:
    POM
    PA (Nylon)
    PTFE (Teflon)

    Nylon is most likely since it is not harmed by oil and grease
    There are different types of nylon PA6, PA6.6, PA12.6 etc (firts 2 are most used)
    Also probably reinforced most likely by carbon fibres
    So there is a vast range of mechanical properties
    I believe good wear and shock resistance are the ones to go for

    Frank
    Let me know if you need more info
     
  5. mad dog

    mad dog Formula Junior

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    #5 mad dog, Jan 27, 2015
    Thanks Frank
    Base on what you've said, and after further advise we are going for a test set machined out of PA6.6 - or 4.6 if we can get it!
    Seems to have all the properties we need. I suppose tricky bit is we would need to wait 15 years to gauge longevity!
     
  6. Subarubrat

    Subarubrat Formula 3

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    Scott
    #6 Subarubrat, Jan 27, 2015
    Bolt the damper to a plate on the bench, weld a pin onto the top of the flywheel, and set a motor up with a slightly offset pin (think like a small engine crankshaft) and let it bang it back and forth for as many cycles as you want. I tested a propeller speed reduction unit this way (single speed transmission for an airplane, I was simulating power pulses loading the prop) and you can calculate how many cycles per min and then let it run to 100k, 1m, or as many cycles as you please. The offset of the pin will determine the force imparted to the test article, you can get fancy with strain gauges and a datalogger but just beating the crap out of it for a long time is usually a good indicator.
     
  7. mad dog

    mad dog Formula Junior

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    #7 mad dog, Jan 27, 2015
    good idea thanks for that!
     

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