Jonathon May wrote on 10/3/2019 9:55 AM:

I have been using a Dive type cylinder because they are easier to
get re filled.
Last Saturday I was flying with the bottle on but the regulator off
above a ridge trying to connect to the wave system.
About 1 hour in and 2700ft asl there was a loud pop and bottle
pressure O2 started blowing into the cockpit .
I could not turn the bottle off so I opened the DV window put a
Pan call out and got it back on the glider field in about 3 minuets .
I have never been so scared ,and I have loads of field landings and
thousands of hours in gliders.
I blame it on lack of maintenance and use, the cylinders has been
sitting in the glider since March turned off while I flew thermals in
the UK.
My bad just need the bottle re-filling and probably a new O ring.

What is a Dive type cylinder, and why is it easier to get it refilled with oxygen?

What failed and caused the pop?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1