[sdiy] sort of OT: bullet ricochet noise?

[brian.walker890 at ntlworld.com]

> Subject: Re: [sdiy] sort of OT: bullet ricochet noise?

Known as tumble

It is the nose to tail rotation as opposed to axial spin
that causes the noise

Pointed end, side, flat end, side, pointed end

The doppler effect is from the wind across the flat end as the angel changes




> I think we're both on the same page when we say "inducing spin" we mean a 
> different spin from the original torsional spin induced by the rifling. So I 
> guess it would be be more accurate to say the impact induces a "roll" or a 
> "new spin" or "flop" since the rifling makes it spin along it's axis it's a 
> symetrical spin, but then richocheting makes it do an oblong radial flop 
> which would make more noise than it's axial spin.




> I wonder if I could do something like that on my MKS-50?
> 
> > Oh absolutely it's from the collision inducing some kind of spin on the
> > bullet I'd think mixed with whatever sound rings out from the thing it
> > hit. DIve bombing ...you're just hearing the resonances induced into air
> > by whatever parts are resonating under the extreme stresses. Dive flaps
> > and like that I'd think. No a bullet that rocochets is actually spinning
> > in a way that creates a functional oscillator and doppler effect. You
> > can do sounds like that on a DX7 or the like fairly well I'd think. -Bob
> >
> > anthony wrote:
> >
> >> Does anybody know? What causes that motor-like noise when a bullet
> >> ricochets? Is it the bullet spinning really fast? Is it similar to
> >> what an airplane sounds like when it's in a divebomb maneuver? If
> >> you've never heard that, just go camping in Alexander Springs in
> >> Florida - unless they've shut that training facility since 1990.
> >> Scared the bejesus out of me - no one told me a bombing test range was
> >> next to where we were camping. Still, the Springs are worth it. Watch
> >> out for the gators! They're fast motherfuckers!
> >>
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> >
> > 
> 
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