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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.

Northern lights

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Northern lights

Post by WRA2 » Thu Jan 09, 2014 5:40 pm

According to the news, there is supposed to be a really good display of the northern lights tonight:

http://www.weather.com/news/science/spa ... t-20140109

http://science.time.com/2014/01/08/nort ... y-tonight/

If anyone gets any pictures or video, please post them here.


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Re: Northern lights

Post by Reptiglorandrockets » Thu Jan 09, 2014 11:22 pm

WRA2 wrote:According to the news, there is supposed to be a really good display of the northern lights tonight:

http://www.weather.com/news/science/spa ... t-20140109

http://science.time.com/2014/01/08/nort ... y-tonight/

If anyone gets any pictures or video, please post them here.
I have always wanted to see the northern lights, the problem is that most of my family lives in the south! I heard somewhere on this forum that Bugwubber is located somewhere in Minnesota, hopefully he will be able to get a glimps and perhaps a video of the show.:-)


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Re: Northern lights

Post by Water Rocket Expert » Fri Jan 10, 2014 12:20 pm

For anyone who want to know I live in Maryland. :?


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Re: Northern lights

Post by arjan » Fri Jan 10, 2014 2:59 pm

The geomagnetic storm that wasn’t....
http://britgeopeople.blogspot.co.uk/201 ... r.html?m=1


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Re: Northern lights

Post by Water Rocket Expert » Fri Jan 10, 2014 3:57 pm

arjan wrote:The geomagnetic storm that wasn’t....
http://britgeopeople.blogspot.co.uk/201 ... r.html?m=1
Wow that really helped me understand things a bit. Update: right now I am painting my latest rocket


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Re: Northern lights

Post by Water Rocket Expert » Fri Jan 10, 2014 3:59 pm

Hey guys when I tested my spliced today almost all of them burst at 80 psi. I let them dry for two days twice the recommended 24 hours. can you explain? :yikes:


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Re: Northern lights

Post by Water Rocket Expert » Fri Jan 10, 2014 4:00 pm

Hey WRA2. I have a question. Do you guys launch water rockets.


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Re: Northern lights

Post by Reptiglorandrockets » Fri Jan 10, 2014 5:36 pm

Water Rocket Expert wrote:Hey guys when I tested my spliced today almost all of them burst at 80 psi. I let them dry for two days twice the recommended 24 hours. can you explain? :yikes:
Your the expert; shouldn't you come up with a reasonable failure conclusion? :-)

Joke aside, where did the splice fail at? If your using the JB Clear weld, there may not be enough strength to keep the splice together. The epoxy does not stick too well to PET plastic unless you really sand down the joints befor gluing them together. The only time to use JB epoxy is to make nozzles, and to do small repairs on the rockets.


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Re: Northern lights

Post by WRA2 » Fri Jan 10, 2014 6:16 pm

Water Rocket Expert wrote:Hey WRA2. I have a question. Do you guys launch water rockets.
In the snow????

XT1


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Re: Northern lights

Post by Water Rocket Expert » Sat Jan 11, 2014 12:06 am

No I used PL Premium but even after two days it was still soft. I assume that waiting a week next time would keep me on the safe side. I stopped using JB Weld for splices when I met with something called Pro Line!


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Re: Northern lights

Post by Water Rocket Expert » Sat Jan 11, 2014 12:08 am

WRA2 wrote:
Water Rocket Expert wrote:Hey WRA2. I have a question. Do you guys launch water rockets.
In the snow????

XT1
How bout a snow filled rocket. Anyone want to post a video of the attempt maybe the snow would just vaporize or something strange like that under high pressure.


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Re: Northern lights

Post by arjan » Sat Jan 11, 2014 3:02 am

Water Rocket Expert wrote:Hey guys when I tested my spliced today almost all of them burst at 80 psi. I let them dry for two days twice the recommended 24 hours. can you explain? :yikes:
Did you follow a tutorial? All tutorials I've read about splicing with PL premium state that you have to let the splice cure for at least five days.


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Re: Northern lights

Post by Water Rocket Expert » Sat Jan 11, 2014 2:12 pm

Woops I just let it cure for 2 days but the one that I let cure for one week worked.


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Re: Northern lights

Post by Water Rocket Expert » Sat Jan 11, 2014 2:13 pm

He still hasn't responded to my PM.


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Re: Northern lights

Post by Team Seneca » Sat Jan 11, 2014 6:58 pm

Water Rocket Expert wrote:He still hasn't responded to my PM.
That's probably because you are of little use to him. He knows you're just learning about water rockets, so he doesn't have to pretend to like you so he can use you to share your innovations with him, and he assumes you don't have a website or a vast network of friends that he would want to get himself promoted on.


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