I don't know if this counts as a "pneumatic cannon" but it's pretty darn close. I haven't seen any other bottle rocket launchers on spudfiles (although maybe there are some), so I figured I should post it.
I got the idea from http://www.sciencetoymaker.org. In fact its nearly an exact copy minus the length and male and female adapter.
Basically, the bottle is pressed against a rim (made by heating the pvc) and creates a seal. It is held there by having zip-ties lock around the neck of the bottle and a piece of 1.5" sch. 40 pvc is lid up preventing the zipties from pushing out. the zip-ties are held onto the 1/2" "barrel" with hose clamps. More detail and constructing instructions and videos can be found on the website. I have nothing to do with the website. I just thought it would be pretty fun to build and shoot.
[youtube][/youtube]
Handheld Bottle Rocket Launcher
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jackssmirkingrevenge
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Nice work and pretty sweet website, I used to love those sort of things as a child and parents should encourage their offspring to partake in such projects.
Have a look at a slightly more sophisticated version by labtec using a commercially purchased quick connect:
Have a look at a slightly more sophisticated version by labtec using a commercially purchased quick connect:
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Labtecpower
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Heh thanks, just wanted to link to that oneHave a look at a slightly more sophisticated version by labtec using a commercially purchased quick connect:
How high can you take the pressure before the zip-ties fail?
The design is pretty appealing to me, because there's no need to mod bottle caps to fit the quick-connect fitting.
Seems like a fun project for the summer hehe
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jackssmirkingrevenge
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The brain chip I implanted in that piston I made for you is working wellLabtecpower wrote:Heh thanks, just wanted to link to that one
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Labtecpower
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Ah, that must be the cause.
It's still standing on a shelf above my bed, the honed steel pipe I wanted to use for the QDV was nicked at school.. I may use it for a future piston hybrid tough
It's still standing on a shelf above my bed, the honed steel pipe I wanted to use for the QDV was nicked at school.. I may use it for a future piston hybrid tough
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Brian the brain
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Nice idea...a homemade zip-tie quick connect...hmm..
I immediately started fantasising about a 12gram CO2 bulb version...
With something to punch a hole bigger than the standard nail..
anyway...back in '87...when I made my handheld bottle-zooka..
I used a steel clamp made from a coathanger...
This is much better.
I could see some simple improvements like having the inner barrel touch the bottom of the bottle.
Another would be to use a pipesize that fits the inner bottleneck as close as possible.( if that isn't the case already)
Also...during my experiments I found that a smaller "jet" gives significantly longer flight time.
Perhaps a bottlecap with a smaller hole could be used with some adaptation to the QD...?
I know I'll have work to do this summer..
I immediately started fantasising about a 12gram CO2 bulb version...
With something to punch a hole bigger than the standard nail..
anyway...back in '87...when I made my handheld bottle-zooka..
I used a steel clamp made from a coathanger...
This is much better.
I could see some simple improvements like having the inner barrel touch the bottom of the bottle.
Another would be to use a pipesize that fits the inner bottleneck as close as possible.( if that isn't the case already)
Also...during my experiments I found that a smaller "jet" gives significantly longer flight time.
Perhaps a bottlecap with a smaller hole could be used with some adaptation to the QD...?
I know I'll have work to do this summer..
Last edited by Brian the brain on Fri Feb 22, 2013 3:00 pm, edited 1 time in total.
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
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Labtecpower
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I used the quick-disconnect garden coupling as a nozzle for the water rockets, indeed gave a longer flight time
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Brian the brain
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I used a ( heavy) steel QD for pneumatic use.
Worked fine dispite the added weight...
Worked fine dispite the added weight...
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
You can't use a bottle cap with this design because then you couldnt put it onto the PVC. And the 1/2" sch. 40 is probably the closest there is. If you put some soap, or even sunblock on it, there's practically no friction while shooting.
And the barrel should be longer. This gun was designed for smaller bottles. I had one for a 2 liter bottle (and boy did it have a recoil) but that one has since been thrown out due to a tragic accident involving a pickup truck in motion, hard tires, and a lot of Broken PVC
And the barrel should be longer. This gun was designed for smaller bottles. I had one for a 2 liter bottle (and boy did it have a recoil) but that one has since been thrown out due to a tragic accident involving a pickup truck in motion, hard tires, and a lot of Broken PVC
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mark.f
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Make it combustion.acs2997 wrote:I don't know if this counts as a "pneumatic cannon" but it's pretty darn close.
I was actually just drawing out a way to make it a hybrid
I was thinking I could add propane, pressurize it, then have an electric connection that set off a stun gun with wires going inside the barrel and out towards the muzzle at the same time I pulled back the release. Maybe a little risky, but if I could get it to work, I could get coke bottles into orbit
I was thinking I could add propane, pressurize it, then have an electric connection that set off a stun gun with wires going inside the barrel and out towards the muzzle at the same time I pulled back the release. Maybe a little risky, but if I could get it to work, I could get coke bottles into orbit