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Thread: Silicone RC Bobbin / Vibration Isolation Dampeners

  1. #21
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    Quote Originally Posted by chatch View Post
    i sent you bobbins yesterday. i think i put 12 in there, not sure. what parts are you missing? if you pm me it'll probably be at the end of my priority list. email my paypal email. i just sent a few arms to finland for free...
    Thanks.. will let you know when they get here... Good move to RMRC..they are experts at distribution.. keeping one supplier stocked is far easier and even if you make less on each frame, the stress (or lack of) will be well worth it..
    Poke it with a fork.. done...

  2. #22
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    Bobbins arrived a while ago, finally had a few minutes up the sleeve to take a decent look at them and mount them. Absolutely excellent, previously was just using some cheap black bobbins I bought off ebay, these clear ones are super super soft! You can nearly pull the silicone inside out if you try and bend the thread far enough Wanted to see how far they go before the break/unglue, neither happened it literally just bent at nearly a right angle.

    I'm cutting up a mount for a new quad shortly, ordered 10 more bobbins.

  3. #23
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    Quote Originally Posted by chatch View Post
    i sent you bobbins yesterday. i think i put 12 in there, not sure. what parts are you missing? if you pm me it'll probably be at the end of my priority list. email my paypal email. i just sent a few arms to finland for free...
    I got 6 in the mail... thanks... now I gotta go dust this thing off and see what it takes to fly it..

    Will likely install some zip ties (loosely) to limit just how far these things can be stretched after installed.. perhaps when they reach 25-50% of stretch, the support of the zip ties will keep them from breaking?
    Last edited by RandallJ; 12th September 2013 at 02:49 PM.
    Poke it with a fork.. done...

  4. #24
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    Just coat them in more silicone!

  5. #25
    Sr. Keyboard Cowbow chatch's Avatar
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    There is no comparison to how these perform, even the GetFPV bobbins. Go right ahead and test them side by side. The fastener will dislodge in a crash but CA is all you need to reseat it.

    I did a lot of research on materials and vibration isolation, probably enough to pass an engineering class on the subject of transmissibility and propagation. A friend of mine who works at Siemens was able to provide testing data and suggestions since he does this sort of thing for a living.
    Last edited by chatch; 12th September 2013 at 05:21 PM.
    Quote Originally Posted by jimmaplesong View Post
    When you're outraged at chatch, please don't quote his bullshit.

  6. #26
    Sr. Keyboard Cowbow chatch's Avatar
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    Quote Originally Posted by .Joel View Post
    Absolutely excellent, previously was just using some cheap black bobbins I bought off ebay, these clear ones are super super soft! You can nearly pull the silicone inside out if you try and bend the thread far enough Wanted to see how far they go before the break/
    awesome, really glad you're happy with them!
    Quote Originally Posted by jimmaplesong View Post
    When you're outraged at chatch, please don't quote his bullshit.

  7. #27
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    can you post the test data?

  8. #28
    Sr. Keyboard Cowbow chatch's Avatar
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    the test data shows Q factor over a specific frequency range. Lower Q factor is better.

    I'm hesitant to post a graph because I'm guessing others that want to produce these don't know which natural frequency range to target in the first place.
    Quote Originally Posted by jimmaplesong View Post
    When you're outraged at chatch, please don't quote his bullshit.

  9. #29
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    I would start at 42 and go from there.

  10. #30
    Navigator Badlands's Avatar
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    Chatch - is it still ok to order a couple of sets of these from REALfpv.com? Stock ok?

    Cheers!

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