Arduino water rocket flight computer

I discovered the Arduino off of boingboeing.net a few months ago, and have been fascinated! I have graduated (I hope) from blinky LED projects to something that merges two hobbies, Arduino and water rockets. I am approaching a flight test, and I am wondering who might have done something similar, or had advise or interest (a search of the Forum found no references).

http://arduinorocket.blogspot.com/

I didn't realise you had any control over a water rocket - vectored thrust using servos, or something like that?

If a rocket a powerful, he will need to trace it with GPS to see the "orbital data" - :)

he will need to trace it with GPS to see the “orbital data”

That’ll be some mighty powerful rocket that can orbit at less than 18km altitude.
You may get altitude, but you won’t get speed! :wink: