17 replies to this topic

[wjames]

ah, takes me back to the days where i experimeted with oxygen+acetylene in various forms of containment.


thin visco in a paper tube doesnt spark all that much.....

[Gavin]

Blue touch paper?

[mike_au]

The deflagration can transition to a detonation given sufficient run-up distance. A stoichiometric Oxygen/Hydrogen mixture has a very high flame front velocity, so the distance is quite small. I seem to recall a test in which DDT was achieved in an open-ended pipe just 10" long and a few inches in diameter.

Well what do you know, you learn something new every day.

(anyone interested can find a bit of a write up here: http://www.galcit.ca...BS/171_20TH.PDF )

Still, I don't think it would happen in a balloon