you can see these bottles (and a lot more) on my page
http://www.wingsandwheels.com/page35.htm
the bottles measure 4 3/16" O.D.
essentially, when the major manufacturers of these cylinders went to
Aluminum bottles they kept the same inside volume, but since steel is
stronger they made the wall thickness on the aluminum bottles thicker and
gained a few mm in the process...
And for what it's worth, I spoke directly with the principles at DG and the
former LS a few years ago and told them of the problem....asked why they
couldn't just simply make the openings a few silly millimeters larger to
accommodate the US owners .they in both cases simply shrugged it off and
said to anyone in the USA it's "your problem" in Germany we have no
problems.. real satisfaction I'd say...
tim
Wings & Wheels
www.wingsandwheels.com

wrote in message
oups.com...
Tim: I'm glad I posted this item so I could see all these comments.
You are right of course that just finding someone to test it isn't the
answer because without the DOT stamp an alert O2 station shouldn't fill
it. I can't understand why the USA and Germany couldn't have agreed
that for EXPERIMENTAL gliders the German bottle was exempt. Mine are
certified to 2900psi and we only fill generally to 1800psi. What is
the circumference of your "small" diameter bottles? and how long are
they? Capacity ? Cost ?