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Since our founding in 2003, we've become the largest, most sophisticated and ground breaking group supporting you, the serious water rocket flyer! Whether you are a beginner or an expert, the WRA2 has something for everyone.

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.

:WRA2: Newest WRA2 members: :WRA2:

Chief Joseph 8th grade science team from Richland, USA Our 1,000th team!!!!!!
Chris Wright from Hemel Hempstead, United Kingdom,
and Kingston Rocketry Club from Kingston upon Thames, United Kingdom

Hovering contest

This forum is for non-members to ask questions about our competitions. Please check our FAQ page before you ask.
Cloud Dancers
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Re: Hovering contest

Postby Cloud Dancers » Thu Sep 18, 2008 12:16 pm

This contest sounds more interesting now that there has been some discussion and clairification. Maybe what is needed is a description of each contest. I like the idea that this is more of a "recovery system" competition and that you don't need expensive altimiters or materials to build the rocket. That means that I can concentrate my rexsources on a top notch lightweight recovery system.
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RaZias
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Re: Hovering contest

Postby RaZias » Sat Sep 20, 2008 5:41 pm

Check this hovering toy. It´s not a rocket it´s more a ufo-helicopter.

[youtube]http://www.youtube.com/watch?v=he3eISKMfnM&feature=related[/youtube]
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Brian
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Re: Hovering contest

Postby Brian » Sun Sep 21, 2008 6:57 pm

RaZias wrote:Check this hovering toy. It´s not a rocket it´s more a ufo-helicopter.

[youtube]http://www.youtube.com/watch?v=he3eISKMfnM&feature=related[/youtube]

ive got 1 of those.
Ascender Water Rockets
http://ascenderwaterrockets.weebly.com/
https://www.youtube.com/channel/UCS2NHXS-VFxEux70DCINR0w
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RaZias
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Re: Hovering contest

Postby RaZias » Wed Sep 24, 2008 12:49 pm

Where it´s a picture of a cracked bottom of a bottle.
This was a hover-rocket when I fill with 250 ml of water and 40 psi.
The valve is glued to the rocket whit a 1440 psi glue for plastics from Pattex.

Image1.jpg



When the rocket is littly tilted it flies in a spiral in a 10m area keeping an diagonal attitude during the flight. This only happens like 1 in 10 times.

Because the nozzle goes inside the rocket some of the water doesn´t get out so it will be a movable mass that avoids the rocket aiming up and keeping a spiral movement.

This was the 2nd hover-rocket and as the first one it also blasted the bottom after some flights.

It has nothing to due with pressure since I tested with 60 psi and every thing was ok...but after some flights at 40 psi it cracked.

The 2 rockets had different glues, one very weak and one that is strong.
So it has nothing to due with the glue.

Why I am using a bike valve ?
Well to hover it needs low pressure and a small nozzle but the combination of the 2 doesn´t give enough trusth to win the gardena friction.
Unplugging the compressor from the valve made it work.

Why in the bottom ?
I think it amplifies more the effect of the water tilting.
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castle-bravo
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Re: Hovering contest

Postby castle-bravo » Sun Sep 06, 2009 4:10 am

nice idea but just what wra2 is saying we just need more members that ar willing to compete the curent's records

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