Hi all,

I realize this is way off topic, but I'm hoping that the collective wisdom
here might stray into the required area of expertise...

I need to create a thin sheet of ice (.0125"-ish) on a plywood ramp
approximately 12" wide and 60" long, and I need to do it quickly; no longer
than 10 minutes. I can't build anything substantial into the ramp (IOW, no
refrigeration coils under the ramp), but anything else might be feasible.
Dry ice and water? I've heard some fire extinguishers could be used to
freeze water? Any suggestions?

Peter

On Fri, 31 Dec 2004 02:42:36 GMT, "Peter Grey"
wrote:

Hi all,

I realize this is way off topic, but I'm hoping that the collective wisdom
here might stray into the required area of expertise...

I need to create a thin sheet of ice (.0125"-ish) on a plywood ramp
approximately 12" wide and 60" long, and I need to do it quickly; no longer
than 10 minutes. I can't build anything substantial into the ramp (IOW, no
refrigeration coils under the ramp), but anything else might be feasible.
Dry ice and water? I've heard some fire extinguishers could be used to
freeze water? Any suggestions?

Do a Google search on supercooled water. Under the right conditions
water can be cooled to below freezing temperature withoutt freezing.
I don't know if you could get transferred from the container to the
plywood without it freezing en route, but it might be worth a try.

Don Foreman wrote:
On Fri, 31 Dec 2004 02:42:36 GMT, "Peter Grey"
wrote:


Hi all,

I realize this is way off topic, but I'm hoping that the collective wisdom
here might stray into the required area of expertise...

I need to create a thin sheet of ice (.0125"-ish) on a plywood ramp
approximately 12" wide and 60" long, and I need to do it quickly; no longer
than 10 minutes. I can't build anything substantial into the ramp (IOW, no
refrigeration coils under the ramp), but anything else might be feasible.
Dry ice and water? I've heard some fire extinguishers could be used to
freeze water? Any suggestions?


Do a Google search on supercooled water. Under the right conditions
water can be cooled to below freezing temperature withoutt freezing.
I don't know if you could get transferred from the container to the
plywood without it freezing en route, but it might be worth a try.


I didn't get the original post, but another google search would be for
"Hilsch vortex tube" which can be made from plumbing fittings, and
outputs supercooled AIR. Maybe shooting into a temporary insulated box
over the ramp, which contains a water mist spray?

Ken Grunke


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