water rocket

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jeff
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Thu Nov 16, 2006 6:29 pm

i got to build a water rocket for school by Monday and i was wondering if anyone had any ideas.



(Its got to have a 2-liter for a base)
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jrrdw
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Thu Nov 16, 2006 6:34 pm

Use a 2 liter pepsi bottle, poke a little hole in the lid, wala, your done.
jeff
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Thu Nov 16, 2006 7:21 pm

but the thing is it has to hit about 400ft away from the launcher
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jrrdw
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Thu Nov 16, 2006 8:20 pm

What kind of air pump are you useing? You do know you have to fill it half way with water and then put plenty of air pressure in then cut it loose. Experment with one, do a simulation, see what happens.
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noname
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Thu Nov 16, 2006 8:22 pm

400 feet. You're an optimist. The furthest I've ever seen one go is like 150 feet.
jeff
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Thu Nov 16, 2006 8:23 pm

the psi is gunna be at 80 and we get to choose everything else so ya, i was just wondering if u had some good mesurements so i wont be left in the dark.
jeff
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Thu Nov 16, 2006 8:26 pm

ive seen em go like 300ft.


but ya i was egzaderating a little on the distance
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ProfessorAmadeus
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Thu Nov 16, 2006 8:30 pm

Just cut out pieces of card board for the fins and use poster board wrapped up like a ice creame cone for the nose cone. Tape some medium sized rocks to the insided of the nose cone for weight and tape every thing on. Mine went way high but i was use 110psi of air.
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jrrdw
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Thu Nov 16, 2006 8:34 pm

Have a good and pointed nose cone, and some stablizeing fins, you mite get lucky. Some people build them out of PVC pipe. Go to www.skyhighrockets.com look around in that forum, i think there is a thread there on water rockets.
jeff
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Thu Nov 16, 2006 8:35 pm

ok i will check it out thx
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noname
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Thu Nov 16, 2006 9:30 pm

Even 300 feet is hard to believe. That's a whole football field, it's really easy to miscalculate distance unless you actually measure it.
jeff
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Thu Nov 16, 2006 9:32 pm

we DID mesure it
cannon freak
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Thu Nov 16, 2006 9:40 pm

For a water rocket one of the main factors is drag, so if you make a pretty areodynamic rocket it should do well.
300 feet isn't that high for a water rocket, for a 2 liter pop bottle it is but if you link a few together you can then get some distance.



Cannon Freak,
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ammosmoke
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Thu Nov 16, 2006 10:01 pm

Ok, just check out this link, and thats all you need!

http://jamesyawn.com/h2o/index.html
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noname
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Thu Nov 16, 2006 11:33 pm

I can believe you got 300 feet, I just doubted it until you said you measured.
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