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  • Hey it's me Destin.

  • I have been invited out to a professional motocross racer Ryan Sipes'

  • house, and today we're gonna talk about how to control a motorcycle.

  • Alright so we're in rural Kentucky,

  • and we've got the V10 high speed camera again,

  • and a bunch of jumps.

  • [music]

  • [laugh]

  • Let's say that you go over on the bike

  • and you're coming up too high, and you need to rock her back down,

  • so all you do is if you've got a flywheel going here, you've got rotational

  • energy stored up here. One half I omega squared.

  • So what you do there is you just tap your brakes.. You can laugh. [laugh]

  • You tap your brakes, and once you do that, that transfers

  • this rotational energy to the whole body of the bike, and once you do that

  • then you'll rock it back over. And Ryan's gonna demonstrate that for us

  • because, he does that intuitively. OK I'm filming

  • Explain that again, I didn't get it. - So basically what you're gonna want to do

  • I mean the technical term behind it, you're gonna want to keep the vertical intertia of your

  • sprocket bearings and your front swing arm caliper

  • vertex equal to X.

  • (Destin) Wait, what? - No that's like.. We all had to learn it.

  • [laughs]

  • - Alright, so the college boy's getting made fun of here.

  • [music]

  • [ Captions by Andrew Jackson ] captionsbyandrew.wordpress.com

  • Captioning in different languages welcome. Please contact Destin if you can help.

Hey it's me Destin.

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B1 中級

モトクロスの物理学 - スマートな毎日30 (The Physics of Motocross - Smarter Every Day 30)

  • 2 1
    林宜悉 に公開 2021 年 01 月 14 日
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