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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.

BlackBrant waterrocket

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FalkE
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BlackBrant waterrocket

Post by FalkE » Sat Mar 10, 2007 4:13 pm

Here are some pictures of my newst waterrockt. I found this website and decided to built a waterrocket which look a bit like the orginal one.
http://ww.blackbrant2.com
Image
3 chutes
Image
The chamber were one chute is in.
Image
At the moment i have som problem to get the pressure in my rockets but i´m looking forward that i can get a bottle from the "feuerwehr". One cotain 300bar pressing air and thats enough for my blackbrant.
But i see you´re record and thats the next step( we planed a rocket made out of a meteltube which should fly at a pressure of 120bar on a altitude of 600m.
But this are visions.



Drag_Racer408a
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Post by Drag_Racer408a » Sat Mar 10, 2007 5:02 pm

Looks great, how does it deploy the chutes?


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FalkE
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Post by FalkE » Sat Mar 10, 2007 5:22 pm

Here is the manuel how this system works:
http://www.raketenmodellbau.org/forum?a ... forumid=52
If you don´t understand i will answer your questions.

Dennis



Drag_Racer408a
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Post by Drag_Racer408a » Sat Mar 10, 2007 11:19 pm

So it uses a cobination of tomy timers with side flaps to deploy the chutes. Looks kinda how mine works!


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Tim Chen
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Post by Tim Chen » Mon Mar 12, 2007 11:38 pm

Dennis,

What are your parachutes made from? They are very colorful and would be easy to see if they got stuck in a tree by accident.

I use plastic trash bin liners for my parachutes and they only are dark green (almost black) or white. The white ones are hard to see in the overcast sky with clouds. The dark ones are hard to see on the ground.


Tim Chen
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FalkE
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Post by FalkE » Tue Mar 13, 2007 11:48 am

Hi,
the parachutes are made out of a umbrella. Thats very cheap and you can built a parachute which fits to your rocket.
Here you can see the umbrella´s face;)
Image



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FalkE
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Post by FalkE » Tue Mar 13, 2007 11:55 am

Sry for double post, but here is a great picture of my launchsite. I´ve got a big are and around of 500m there is no tree^^:
Image



Drag_Racer408a
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Post by Drag_Racer408a » Tue Mar 13, 2007 2:21 pm

The umbrella idea is an awsome one!


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Post by Tim Chen » Wed Mar 14, 2007 7:11 am

Drag_Racer408a wrote:The umbrella idea is an awsome one!
I agree 100%!

Unless I miss my guess, I could cut off the edges and make a smaller umbrella-chute too! I'm going to go to the second-hand shop tomorrow and look at the selection!


Tim Chen
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