"Inquiring Minds have to know":  How does one LAUNCH a water rocket?
(Reply off-list or on, I just want to know <G>)  Hopefully it's
electrical & attached to a PIC.

I've seen Magnetic and optoelectronic "Launch" detectors in model
rockets, btw.  A piece of electrical tape can serve to interrupt the
opto, so long as it's not IR - then you want to add a piece of aluminum
foil inside the tape <G>

Admin note:  We're getting duplicate messages & some people are getting
"You shouldn't send duplicates to the PICList" error messages, known
problem, should be solved soon.  Someone's ISP is messed up, I'm being
patient.

  Mark