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Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: sp1ke » Mon Mar 22, 2010 7:01 pm

i have decided on making a heat molded pvc grip for the handle i plan on making it much like the one that i put the link on...
my oven is heating up to 400 right now, i plan on just bending about a foot long piece of 1" pvc at about a 60 degree angle then squeezing it while still hot to make the finger indentions in the front...

any suggestions?
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 23, 2010 12:05 am

What about acetone + expanded polystyrene? No need to fuss with ovens (plus you really don't want to be heating PVC *cough cough etc.*)
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Unread postAuthor: Duane31 » Tue Mar 23, 2010 12:26 am

deathbyDWV wrote:
or small game from over 20-30 feet


No talk of shooting animals... It's in the rules.

Btw I'd go with half inch chamber. You'll get 30 ft very accurate with darts.


Hmmm. He said small game, which means food. I took a squirrel with my very modified Benjamin 392 today out about 70 yards. Dropped him in his tracks. It was humane. Don't tattle!
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Unread postAuthor: Coodude26 » Tue Mar 23, 2010 1:00 am

jackssmirkingrevenge wrote:What about acetone + expanded polystyrene? No need to fuss with ovens (plus you really don't want to be heating PVC *cough cough etc.*)



PVC is a thermoplastic, meaning that under the correct conditions it can be heated and molded without releasing any chemicals/carcinogens.
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Plumbers have a funny definition of half an inch...


[quote=chinnerz]once my and one of my mates spent a whole day modding a nurf pistol.... it ended up shooting 1 extra meter and had an awesome paint job. (not rly worth it) [/quote]

/\why I don't like Nerf...
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 23, 2010 1:00 am

Duane31 wrote:Hmmm. He said small game, which means food. I took a squirrel with my very modified Benjamin 392 today out about 70 yards. Dropped him in his tracks. It was humane. Don't tattle!


Small game can be and is taken regularly with air guns, no one's disputing that, but rules is rules...

Discussion of shooting anything at any person and/or animal is prohibited, and may result in a permanent banning of your account.
The exception to this rule is for proper use of legal airsoft and/or paintball markers.


Coodude26 wrote:PVC is a thermoplastic, meaning that under the correct conditions it can be heated and molded without releasing any chemicals/carcinogens.


No doubt, but the keywords here are under the correct conditions ;)
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Unread postAuthor: Coodude26 » Wed Mar 24, 2010 12:24 am

jackssmirkingrevenge wrote:
Coodude26 wrote:PVC is a thermoplastic, meaning that under the correct conditions it can be heated and molded without releasing any chemicals/carcinogens.


No doubt, but the keywords here are under the correct conditions ;)


Yeah, but it's not necessarily hard to do. Using a heat gun (NOT a blow dryer) or sticking it in the oven for a while and keeping an eye on it both work fine.
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Plumbers have a funny definition of half an inch...


[quote=chinnerz]once my and one of my mates spent a whole day modding a nurf pistol.... it ended up shooting 1 extra meter and had an awesome paint job. (not rly worth it) [/quote]

/\why I don't like Nerf...
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Unread postAuthor: Technician1002 » Wed Mar 24, 2010 12:38 am

Having molded PVC pipe for some of my cannons, I can not recommend the method for finger grips, but it works well for bending. The pipe softens to something that resembles a garden hose. If you ever squeezed a garden hose by hand to make intents, you will notice this is very difficult. It will not mold like modeling clay. When reheated and softened again, it returns to it's original shape.

Bear this in mind before proceeding. Use oven or other hot item insulation. Holding a piece of PVC that is hotter than boiling water while it cools is not recommeded to do with bare hands.

Once bent, it can be quickly cooled by running cool water through it while holding the shape.

Edit; Some of my bent PVC can be seen here;
http://www.spudfiles.com/forums/general ... 18336.html

I gently heat mine outdoors about a foot over the end of a propane torch. Keep it moving quickly. It will rapidly toast if left to overheat a spot. Keep it out of the flame. Just slowly roast it till it softens and turns to a garden hose softness.
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Unread postAuthor: Crna Legija » Wed Mar 24, 2010 1:21 am

would the homemade polystyrene be good to make pistons.
is it the same as petrol and polystyrene
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