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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.

An easy question (hopefully...)

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
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sublimescience
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An easy question (hopefully...)

Post by sublimescience » Fri Sep 11, 2009 5:07 pm

Hi there!

Hopefully a quick an simple question. I run water rocket challenge activities for children and we use pretty standard water rockets eg. http://www.eurocosm.com/Application/ima ... ket-md.jpg

The green connector bit (looks like a hozelock garden hose connector) is what I'm looking to find replacements for. These are not the same thread as the hozelock connectors. Does anyone know where to get some that directly attach to standard drinks bottles (eg coke).

I did find a batch of these about a year ago but I'm now running out and it would be amazing if anyone could help. I use them for teaching chidlren about science http://www.sublimescience.com and would really like to keep the water rockets going!

Hope that makes sense and thanks in advance!

Best,

Marc



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rockets-in-brighton
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Re: An easy question (hopefully...)

Post by rockets-in-brighton » Sat Sep 12, 2009 2:27 am

Can't help with the nozzles - perhaps you need to shift to a custom launcher so you are not dependent on propietary nozzles. The forum could help you there.

Off-topic, but you might also be interested in the coke/mentos mini launchers I knocked up for a birthday party tomorrow. I put a briefing video up on my youtube channel for the other grownups. Link via google-groups/rockets-in-brighton.


Cheers
Steve
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WEB: http://groups.google.co.uk/group/rockets-in-brighton

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U.S. Water Rockets1
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Re: An easy question (hopefully...)

Post by U.S. Water Rockets1 » Sat Sep 12, 2009 9:27 pm

sublimescience wrote:Hi there!

Hopefully a quick an simple question. I run water rocket challenge activities for children and we use pretty standard water rockets eg. http://www.eurocosm.com/Application/ima ... ket-md.jpg

The green connector bit (looks like a hozelock garden hose connector) is what I'm looking to find replacements for. These are not the same thread as the hozelock connectors. Does anyone know where to get some that directly attach to standard drinks bottles (eg coke).

I did find a batch of these about a year ago but I'm now running out and it would be amazing if anyone could help. I use them for teaching chidlren about science http://www.sublimescience.com and would really like to keep the water rockets going!

Hope that makes sense and thanks in advance!

Best,

Marc
Hi,

We have a design for a launcher on our website (waterrockets.multiply.com) that you can build very easily and inexpensively. The advantage of this launcher is that it uses the full open mouth of a bottle for the nozzle, so there's no need for a screw on nozzle or any modifications to the bottle. Our design is based on the Clark cable tie launcher design.


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air.command
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Re: An easy question (hopefully...)

Post by air.command » Wed Sep 16, 2009 5:39 am

sublimescience wrote:Hi there!

Hopefully a quick an simple question. I run water rocket challenge activities for children and we use pretty standard water rockets eg. http://www.eurocosm.com/Application/ima ... ket-md.jpg

The green connector bit (looks like a hozelock garden hose connector) is what I'm looking to find replacements for. These are not the same thread as the hozelock connectors. Does anyone know where to get some that directly attach to standard drinks bottles (eg coke).

I did find a batch of these about a year ago but I'm now running out and it would be amazing if anyone could help. I use them for teaching chidlren about science http://www.sublimescience.com and would really like to keep the water rockets going!

Hope that makes sense and thanks in advance!

Best,

Marc
Hi Marc,

Here in Oz there is a similar commercial launcher to the one you provided a link to. (available from Jaycar) http://www.jaycar.com.au/productView.as ... rm=KEYWORD They also sell packs of 3 rockets. The order code for the 3 pack is: GT-3602.

I am pretty sure the nozzle types are identical to what you are looking for. They fit a standard bottle and also fit to a standard plastic hose connector. You may be able to order online from them. The seals they come with are a little dodgy so you may need to replace those.

- George


http://www.AirCommandRockets.com

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quique uy
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Re: An easy question (hopefully...)

Post by quique uy » Wed Jan 27, 2010 9:17 am

This is a test of my launcher
It is made based in the first image in this post
is fabricated with gardena coupling 9mm

Esta es una prueba de mi lanzador
Está fabricada basada en la primera imagen de este post
Está hecha con acoples de jardín de 9mm

[youtube][/youtube]


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Asociación de Cohetería Experimental y Modelista del Uruguay

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