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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.

Stage 2 Launcher

Discussion about Compressors, hose, pipes, fittings, launchers, release mechanisms, and launch tubes.
Graveyard
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Stage 2 Launcher

Post by Graveyard » Tue Sep 23, 2008 7:17 pm

I apologize for the large photos... but here are some quick shots of My latest design. This is a tube style launcher. The water is poured into the lower canister and an empty rocket is positioned over the tube and clamped. The remote allows you to pressurize the canister (left toggle) to pump the water up into the rocket. The right toggle pressurizes the rocket up to 115 psi. I have this unit regulated at 100 psi max. Everything is anodized aluminum, stainless steel or brass. No rust !!!...........enjoy!!
Oh yeah, the best part....the big red button is for blast-off...lol (the entire unit is operated from a 7 gallon portable air tank) I'm considering adding a Co2 option.
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reno1
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Re: Stage 2 Launcher

Post by reno1 » Tue Sep 23, 2008 9:26 pm

WOW!, That makes mine look like a dinosaur. LOL. Great job!


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chriswaterrockets
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Re: Stage 2 Launcher

Post by chriswaterrockets » Wed Sep 24, 2008 5:13 am

Man, you're a genius!!!
Most of all I like that red button!
christian



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RaZias
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Re: Stage 2 Launcher

Post by RaZias » Wed Sep 24, 2008 5:32 am

It´s like sex on weels...or better say...on fins ?

You could make it for 1500 psi.
It´s necessary to think big since you never know when you will want to go higher or race in WRA.
That way the money you spend in that launcher would be the necessary one avoiding repeting it.


Research and Development is the soul of WR

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Tim Chen
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Re: Stage 2 Launcher

Post by Tim Chen » Wed Sep 24, 2008 11:19 am

:shock: OMG! That launcher is like a Ferrari and we're all driving Fords!!! That's the sweetest piece of kit I've ever laid my eyes on!

I've seen some really impressive launchers in the past, but yours is simply the BEST ever.

You're making a name for yourself as one of the best water rocket builders ever!

8)


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RaZias
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Re: Stage 2 Launcher

Post by RaZias » Wed Sep 24, 2008 12:20 pm

Want an idea ? Start selling it on the web, or selling custom launchers.

Anyway you can only sell as it´s since it must pass by some sort of test of an official entity like the one that tests toys and scuba tanks.


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reno1
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Re: Stage 2 Launcher

Post by reno1 » Wed Sep 24, 2008 12:27 pm

Tim Chen wrote::shock: OMG! That launcher is like a Ferrari and we're all driving Fords!!! That's the sweetest piece of kit I've ever laid my eyes on!

I've seen some really impressive launchers in the past, but yours is simply the BEST ever.

You're making a name for yourself as one of the best water rocket builders ever!

8)
Hey, I like my Ford. It's built tough.......Ford tough. LOL


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Team Pump It!

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reno1
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Re: Stage 2 Launcher

Post by reno1 » Wed Sep 24, 2008 12:31 pm

And it looks like Graveyard likes the Ford stuff too. Hint: look in the back ground in the pics.


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Graveyard
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Re: Stage 2 Launcher

Post by Graveyard » Wed Sep 24, 2008 2:35 pm

Thanks very much to Everyone for all the comments!! It's been a nice project over the last six months or so. I have built 2 launchers...twins. I'm still going to build a splitter to be able to fire both simitaniously.
Does Anyone here use CO2 ? I've been looking at 20 oz. bottles...Lowes has a Kobalt with regulator but I'm not sure about it.
I'm wondering if CO2 will frost over my valves and regulators in my controller.

Again, Thanks all
maybe some video soon 8)



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Bonami
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Re: Stage 2 Launcher

Post by Bonami » Wed Sep 24, 2008 4:21 pm

Graveyard wrote:Thanks very much to Everyone for all the comments!! It's been a nice project over the last six months or so. I have built 2 launchers...twins. I'm still going to build a splitter to be able to fire both simitaniously.
Does Anyone here use CO2 ? I've been looking at 20 oz. bottles...Lowes has a Kobalt with regulator but I'm not sure about it.
I'm wondering if CO2 will frost over my valves and regulators in my controller.

Again, Thanks all
maybe some video soon 8)
VERY COOL LAUNCHER!

If you use a regulator there's little chance of the tank freezing up, but the gas coming out will still be quite cold so it may cause problems if the plumbing is not designed for it. There are also some metals and gasses that react and create oxides that may gum up the works. I read some warnings about this a long time ago but do not recall the details.



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Re: Stage 2 Launcher

Post by WRA2 » Thu Sep 25, 2008 8:25 pm

Graveyard wrote:Thanks very much to Everyone for all the comments!! It's been a nice project over the last six months or so. I have built 2 launchers...twins. I'm still going to build a splitter to be able to fire both simitaniously.
Does Anyone here use CO2 ? I've been looking at 20 oz. bottles...Lowes has a Kobalt with regulator but I'm not sure about it.
I'm wondering if CO2 will frost over my valves and regulators in my controller.

Again, Thanks all
maybe some video soon 8)
Keep in mind that if you plan on entering any of the competitions that CO2 is not allowed. Also a 20oz bottle will only be good for a couple of launches (with a standard 2 liter bottle rocket. If you go bigger then it may fill it once).


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Graveyard
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Re: Stage 2 Launcher

Post by Graveyard » Thu Sep 25, 2008 9:54 pm

No kidding? Just a couple of launches... I really thought it would be more. A week ago or so I had found some info on a spud cannon. They were using the 12 gram pellet gun co2 canisters. I forget exactly what the numbers were but it seems that at 100 psi, the 12 gram canister would fill approx 43 cubic inches. Don't hold me to this because I don't have my books in front of me but I think I was converting 1.5 liters to cubic inches and it came in around 63-65 cubic inches...@100psi. I didn't take into account any stretch whatsoever. My figures were strictly ballpark.
At any rate, it kinda sounds like it could get costly...tank rental, refills, gauges, etc...
I use a portable 7 gallon air tank with 140 psi pop-off valve. I can get several 80 psi launches and then several more at a reduced pressure. The Kids really had a blast with it on the 4th of July plus it was a good troubleshooting session.
Thanks for the input about the co2
Later 8)



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Mark Chen
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Re: Stage 2 Launcher

Post by Mark Chen » Fri Sep 26, 2008 10:04 am

Graveyard wrote:No kidding? Just a couple of launches... I really thought it would be more. A week ago or so I had found some info on a spud cannon. They were using the 12 gram pellet gun co2 canisters. I forget exactly what the numbers were but it seems that at 100 psi, the 12 gram canister would fill approx 43 cubic inches. Don't hold me to this because I don't have my books in front of me but I think I was converting 1.5 liters to cubic inches and it came in around 63-65 cubic inches...@100psi. I didn't take into account any stretch whatsoever. My figures were strictly ballpark.
At any rate, it kinda sounds like it could get costly...tank rental, refills, gauges, etc...
I use a portable 7 gallon air tank with 140 psi pop-off valve. I can get several 80 psi launches and then several more at a reduced pressure. The Kids really had a blast with it on the 4th of July plus it was a good troubleshooting session.
Thanks for the input about the co2
Later 8)
I just calculated it out:
1 liter = 61.0237441 cubic inches
1.5 liter = 91.5356161 cubic inches


Mark Chen
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Graveyard
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Re: Stage 2 Launcher

Post by Graveyard » Fri Sep 26, 2008 11:27 am

Okay, 1 liter is in the 60's...I told ya not to hold me to it...haha



Cloud Dancers
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Re: Stage 2 Launcher

Post by Cloud Dancers » Fri Sep 26, 2008 12:06 pm

Graveyard wrote:No kidding? Just a couple of launches... I really thought it would be more. A week ago or so I had found some info on a spud cannon. They were using the 12 gram pellet gun co2 canisters. I forget exactly what the numbers were but it seems that at 100 psi, the 12 gram canister would fill approx 43 cubic inches. Don't hold me to this because I don't have my books in front of me but I think I was converting 1.5 liters to cubic inches and it came in around 63-65 cubic inches...@100psi. I didn't take into account any stretch whatsoever. My figures were strictly ballpark.
At any rate, it kinda sounds like it could get costly...tank rental, refills, gauges, etc...
I use a portable 7 gallon air tank with 140 psi pop-off valve. I can get several 80 psi launches and then several more at a reduced pressure. The Kids really had a blast with it on the 4th of July plus it was a good troubleshooting session.
Thanks for the input about the co2
Later 8)
Think of how much air remains in the launcher and hose. That could get expensive in a hurry. A larger tank might work but will be more costly. Much better to have a renewable source like the tank you fill with a compressor.


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