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    water rocket build from balsawood and japanes silk paper and PET bottles
big water rocket
This is a project I started a few years ago but finally finished in 2012.   Based on the principle of the common PET bottle rockets a build a big waterrocket  which I have succesfully launched 2 times. On the third launch the parachute mechanism failed and the rocket crashed and was completly destroyed.
finished RKT1 and flight control center  final system checks.
some contsruction details
carrying the rocket to the launch site for it's first launch.
pressurizing the rocket with a bicycle pump
the launch mechanism failed and I had to launch it by hand,  rather dangerous, but succesfull
succesful parachute deployment and descent.
RKT1 after save descent undameged and ready for it's next launch
RKT1's  second lift-off
still ascending..