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danwolff
Subsonic, but more ping pong wreckage since it's on topic:

http://danwolff.net/archive/pingpong/

rtkwe
No, it's quite clearly supersonic. This is a different design than the tube they talk about first.

http://www.youtube.com/watch?feature=player_embedded&v=I...

danwolff
The colon at the end of the first line was intended to map the first text string to the last text string of my original post. So, you're right, and sorry for the confusing grammar.
rayiner
Oh C-D nozzles. Hands-down the most useful thing I learned in undergrad.