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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.

Deployment System

Members post instructions to construct water rockets, launchers, deployment systems, staging mechanisms, splicing bottles, and payloads.
Arthur Liew
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Re: Deployment System

Post by Arthur Liew » Sat Jun 01, 2013 9:50 pm

I will try to put vent holes.

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Re: Deployment System

Post by Tony » Mon Jun 03, 2013 11:20 am

You'll only need one or two pinhole sized holes. If you use large openings you might cause too much drag and rip the nosecone off during launch.

"Houston, we've had a problem..."

Arthur Liew
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Re: Deployment System

Post by Arthur Liew » Wed Jun 05, 2013 12:20 am

OK,will try that.

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Nick B
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Re: Deployment System

Post by Nick B » Mon Jul 08, 2013 12:35 pm

It could be vacuum or rocket body weight or a combination, holding it on by momentum. This means your rocket is functioning good. It's an over achiever.

The drawback of this recovery system is angular launches prevent nose cone separation, and so does a fast apogee.
It's not very reliable.

You can try:
large side openings or holes to prevent a vacuum from keeping it on,
Increasing the rocket drag with larger thicker fins,
increasing nose cone weight to outpace current rocket drag,
or create a weight that is unstable.

Most reduce the performance of your rocket in sacrifice of making the recovery system function better.

I have a system that changes the weight CL and unsettles the nosecone to pull it off.

I am also working on two other recovery systems that will be disclosed at a later time, that are equally simple and much more reliable.

Nick and Dad B.

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Re: Deployment System

Post by robertkyoski » Wed Jul 17, 2013 1:33 am

Hobbyking HXT-900 is what I recommend

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U.S. Water Rockets1
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Re: Deployment System

Post by U.S. Water Rockets1 » Sat Jul 20, 2013 10:26 pm

robertkyoski wrote:Hobbyking HXT-900 is what I recommend
These are great because they work well with only a single LiPo battery as the power source.

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