Re: What is a good visual reactive target for rifles?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">An excerpt from
Shear Thickening Fluid:
Corn Starch and Water (Oobleck)
Cornstarch is a common thickening agent used in cooking. It is also a very good example of a shear thickening system. When a force is applied to a 1:2.5 mixture of water and cornstarch, the cornstarch acts as a solid and resists the force. For a great demo of this behavior, check out this wideo:
<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/vCHPo3EA7oE"></param> <param name="wmode" value="transparent"></param> <embed src="http://www.youtube.com/v/vCHPo3EA7oE" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> </embed></object>.
Filling a container with this mixture might resolve the bullet passthru issues.
Personally, I suspect the red coloring would be rather overly suggestive for a public demo, and suggest you try Orange (or Green, to reduce any need for cleanup).
If anyone wants to know how this is done, I'd suggest a rather vague "It's all just Science Magic" sort of reply. I mean, we wouldn't want perps armoring themselves up with homeade liquid body armor, would we?
Greg </div></div>
I haven't shot a non-newtonian fluid, but suspect it would have the opposite effect. Changing viscosity would absorb energy and exacerbate the problem. Maybe a round enters, punches a nice clean hole, no exit? I would expect this to behave like shooting a bucket of sand.