Incredible Spinning Bullet

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BenTC
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Incredible Spinning Bullet

Post by BenTC »

In theory there is no difference between theory and practice, but in practice there is.

krenshala
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Post by krenshala »

Interesting.

I'm assuming works because the ice gives/deforms just enough to bounce the bullet if hit at the correct angle. The spinning itself is obviously just the rotational inertia from the rifling.

TallDave
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Post by TallDave »

That's funny. I wondered what the RPMs were.
n*kBolt*Te = B**2/(2*mu0) and B^.25 loss scaling? Or not so much? Hopefully we'll know soon...

choff
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Post by choff »

I watched a mythbusters episode about diving into water to avoid getting shot. Very different effect with water than ice.
CHoff

TallDave
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Post by TallDave »

I'd sure like to see a slow motion shot. Maybe the Mythbusters guys will try this out.
n*kBolt*Te = B**2/(2*mu0) and B^.25 loss scaling? Or not so much? Hopefully we'll know soon...

krenshala
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Location: Austin, TX, NorAm, Sol III

Post by krenshala »

TallDave wrote:I'd sure like to see a slow motion shot. Maybe the Mythbusters guys will try this out.
That or the guys from Time Warp. ;)

GW Johnson
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Post by GW Johnson »

Looks more like a .38 than a .40 caliber.

That being said, it looks like a small percentage of his shots bounced off the ice rather than penetrating. Given the low angle, that's not so very surprising.

These ricochets come to rest as objects spinning very fast, but not translating very fast, on the ice. The rapid spin causes a very localized and small amount of friction heating, for a thin film of water between bullet and ice.

Wet ice has a lot less friction than dry (try driving on wet glare ice sometime). So, the spinning bullet does not slow down very fast.

There is some chance you will have a spinning ricochet come down close enough to see before it quits spinning. I suspect the chance of being directly struck by the ricochet is at least crudely similar.

All in all, not an experiment I'd recommend. But interesting, nonetheless.
GW Johnson
McGregor, Texas

choff
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Post by choff »

They're not poster boys for firearms safety, that's for sure.
CHoff

krenshala
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Location: Austin, TX, NorAm, Sol III

Post by krenshala »

choff wrote:They're not poster boys for firearms safety, that's for sure.
Agreed. ;) I do like the fact the person that posted it to YouTube included a "We recommend you don't do it this way, as its dangerous" message at the beginning of the video.

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