Date: Thu, 03 Oct 2002 13:19:51 -0600

Author: "Zigmund J. Peacock"

Subject: Re: Vacuum Cannon question

Post:



Stephen, I am just using the 3M tape, I did sand the ends of the pipe very
flat
with no rounding of the edges.
I do clean the end of the pipe with acetone prior to shooting.
Wayne Petersen of BYU uses the couple system similar to Skinners setup
with a square of space blanket coated mylar as his rear membrane and a
plastic
thread protector cap [you know those little blue throw away thingies] for
his front cap. This system of Waynes is very strong [mylar] and very
repeatable, you could
substitute a thin aluminum cap on the front so long as it was tethered.
Good luck. Zig

Zigmund J. Peacock WWW.physics.utah.edu/people/staff/peacock.html

University of Utah/Physics
peacock@physics.utah.edu
115 SOUTH 1400 EAST #201 Tel 801 581 6602
SALT LAKE CITY UT 84112-0830 Fax 801 581 4801

"We sleep safely in our beds because rough men stand ready in
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-- Edmund Burke

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