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personal grenade launcher

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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personal grenade launcher

Unread postAuthor: quiggly17 » Fri Dec 14, 2007 8:10 pm

this is my new cannon for paintball it launches homemade devices that produce smoke without fire or paintball shotgun loads its breeched loaded and is powered by a co2 quik change adapter for paintball guns(not shown in pics) good

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Last edited by quiggly17 on Sat Dec 15, 2007 2:30 am, edited 1 time in total.

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Unread postAuthor: PVC Arsenal 17 » Fri Dec 14, 2007 8:12 pm

Very low chamber volume means less power and more pressure able to build up from the CO2. Be carefull...
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Unread postAuthor: quiggly17 » Fri Dec 14, 2007 8:17 pm

thanks for the warning i was thinking the same thing but the first test fire went great it was not ment for long range thats why the barrel is short its about a 20 or 25 yard gun ment for close combat
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Unread postAuthor: grumpy » Fri Dec 14, 2007 9:30 pm

i don't want to sound mean but, you know that sprinkler valve is not designed for the kind of pressures and cold that a 12 gram can generate, i strongly recomend using a metal pressure chamber that will 100 to 150 psi. you would als find out that with a pressure chamber the co2 will have room to expand giving it more power and distance. i also play paintball alot and have reffed alot, and no field i have been on would allow you use your launcher the way it is currently set up. and for your safety and the safety of anyone close to you please DO NOT fire it again till you make changes.
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Last edited by grumpy on Fri Dec 14, 2007 9:47 pm, edited 1 time in total.

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Unread postAuthor: goathunter » Fri Dec 14, 2007 9:36 pm

So tell me exactly how you got this gun to handle the 300 psi, or so at the very least, generated by a 12 gram?Hate to sound mean but you are on a quick path to plastic explosion.
Second,how does the breach lock?I would assume friction?
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Unread postAuthor: noob of noobs » Fri Dec 14, 2007 11:50 pm

That's a very interesting design. As said before though, there are some things that need changes. I know that sprinkler valves such as that are only rated for 125 psi (the can be modded for 175 I think however). If the CO2's regulated however, I don't think you'll have any problems (of course, I've never worked with CO2).
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Unread postAuthor: qbnbountyhunter » Fri Dec 14, 2007 11:59 pm

i have been trying to design a grenade lancher for airsoft/paintball for the last week or so, and the breech loading system you got there will definatly inspire me for my design, nice launcher, it would look great on a m4/ar-15 assualt rifle
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Unread postAuthor: quiggly17 » Sat Dec 15, 2007 12:53 am

thanks for the feed back ill redesign the chamber safety
it would look great on a m4/ar-15 assualt rifle
it was originally desighned to go under a gun

its friction lock for now until i can think of away to lock it better

grumpy how big a chamber would you say i need and take into count i want to stay as small as possible once again thanks for all the feed back its just helps me make a better cannon
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Unread postAuthor: benstern » Sat Dec 15, 2007 1:17 am

"Discussion of solid propellants, explosive devices or incendiary projectiles fired specifically from a spud cannon is prohibited, and may result in a permanent banning of your account."

"Incendiary projectile: Any projectile that is capable of producing flame.

1. Rocket propelled projectiles, pyrotechnic smoke bombs, or any other burning projectiles would qualify as an incendiary projectile."
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Unread postAuthor: qbnbountyhunter » Sat Dec 15, 2007 2:02 am

@ benstern: smoke bombs are permitted in paintball/airsoft wars, its not like he is giving instructions on how to make one.
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Unread postAuthor: benstern » Sat Dec 15, 2007 2:25 am

But it is not permitted on spudfiles, irregardless of context.
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Unread postAuthor: MrCrowley » Sat Dec 15, 2007 2:26 am

This topic is fine, but thanks for your concern Benstern.
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Unread postAuthor: quiggly17 » Sat Dec 15, 2007 2:27 am

Discussion of solid propellants


the mentioning of the way i play paintball is hardly a discussion about "incendiary devices" im just simply looking for feed back on how to improve my cannon i know your a moderator and thats your job but by mentioning what its used for will allow people to better help me for my needs sorry for the mention i will fix it
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Last edited by quiggly17 on Sat Dec 15, 2007 2:28 am, edited 1 time in total.

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Unread postAuthor: seudo411 » Sat Dec 15, 2007 2:27 am

quiggly17- Firstly great idea, interesting design, but it be easier to go with a coaxial design, Google "Warmachine" 's t-shirt guns. and then use a butchered blowgun to pilot the piston.
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Unread postAuthor: MrCrowley » Sat Dec 15, 2007 3:40 am

quiggly17 wrote:
Discussion of solid propellants


the mentioning of the way i play paintball is hardly a discussion about "incendiary devices" im just simply looking for feed back on how to improve my cannon i know your a moderator and thats your job but by mentioning what its used for will allow people to better help me for my needs sorry for the mention i will fix it


Benstern isn't a mod, I am though and I say it's fine. You merely mentioned you had shot a smoke bomb, if it's legal in paintball where you shot it, then it's fine here as long as you don't discuss it too much.
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