On Tue, 30 Aug 2005 11:44:23 -0700, "RST Engineering"
wrote:

That wasn't the point, Orval. The original discussion revolved around the
tendency of most aircraft tubes to diffuse air through the walls of the
tube -- deflate themselves by spontaneous diffusion as it were. THe reason
given was that the specification for aircraft tubes uses a material that is
obsolete in the real world but still used in the make-believe world of
aviation.

Somebody brought up the point that Desser (via Michelin?) has come up with a
"no leak" tube that is blessed for aviation use. Some of the group on here
reported that the "no leak" was in fact just that and a few of the folks
plan on switching to that tube at the next opportunity.

They are called "Leak Guard". I thought I paid $12, but it was $28
each for 6.00 X 6 tubes through Desser.

When installing them you fit the tube into the tire with talcum powder
just like a regular ones. Line up the dots, bars, or what ever, toque
the bolts in the split rim, Inflate it, deflate it, and re inflate.
They aren't completely leak proof, but they hold air much longer than
the old tubes. I already mentioned they were only down 4 psi after 6
weeks.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

(You left a B out of your signature line.)

Jim