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A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

Freestyle Physics

Post photos and videos of your rocket, launches and your onboard video or photos here. A wide variety of formats supported including attachments and embedded youtube.
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FalkE
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Freestyle Physics

Post by FalkE » Sun Mar 04, 2007 4:49 pm

Freestyle-Physics is a german water rocket competition in Duisburg.
( http://freestyle-physics.de/)
The rocket must made out of ordinary PET bottles and the max. pressure is 5bar.
I decide to buildt a two stage water rocket without a parachute. The rocket is recovered by backgliding.
The rocket win a prize but not for the maximum of altitude. I won a price for special technical details, there were only two 2 Stage rockets of 240.

Here some pictures of the launch:

http://fkpme246a.uni-duisburg.de/galler ... d=DSC_0188
Rocket in the air, booster burnout:Here was a little Problem, the second stage didn´t start when the booster was straight so the rocket hit a window of a bulding^^.
[/url]http://fkpme246a.uni-duisburg.de/galler ... C_0189[url]

And at the end of this post i´m very sorry for my bad english and i hope you understand everything. In case you don´t understand it ask here and i tried to answer.

Dennis alias. FalkE[/url]



Drag_Racer408a
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Post by Drag_Racer408a » Sun Mar 04, 2007 5:56 pm

Those rockets look ver cool. Some look like they have a glider type recovery!

Sorry to hear about your 2 stage rocket. Those can be quite tricky.

Welcome to the group. Where did you say you were from?


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Tim Chen
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Post by Tim Chen » Sun Mar 04, 2007 10:51 pm

Hello Dennis!

Thank you for posting the videos. What type of mechanism do you use for staging your 2-state rocket? I have been trying to get a stage to fire with a delay after burnout like yours did.

Your english is fine. I can understand you perfectly!

Hey... I have read about Freestyle Physics before. I heard that this year they have put size and pressure and water-mass limits on all the competitors to prevent accidents. Is your building-seeking-missile the reason for the new rules? Ha ha! :P Just kidding.

Welcome!


Tim Chen
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HoLlaeNDi
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Post by HoLlaeNDi » Wed Jun 27, 2007 3:53 pm

Hello together.
I am from Germany too. I took part this year at Freestyle-Physics for the third time. Because there was not much place on the starting field there, there were only allowed rockets out of one bottle with not more than 1,5 l Volume.

But I didn't know about that until March 2007. Before that I had built a 2 Stage Water-Rocket successfully for Freestyle-Physics. It flew around 190 m high!! It was very frustrating that this rocket was not allowed for Freestyle-Physics 2007.

But afterwards I am very happy: our team won with a rocket out of a 1.5l Bottle 127 m high! :-)

HoLlaeNDi



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