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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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Unread postAuthor: inonickname » Sun Apr 29, 2012 1:48 am

Spud Destruction wrote:ok i will have to hunt down a caliper let me work on that. Are they relativley cheap, ive never had to look at one to purchase, i have a large tool shop that i know will carry one. I'll check them out monday after work.


Just buy some cheaper digital ones, probably won't even set you back $20. You can spend thousands on measuring equipment but a cheap pair of calipers will do just fine :wink:
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PimpAssasinG wrote:no im strong but you are a fat gay mother sucker that gets raped by black man for fun
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Unread postAuthor: Zeus » Sun Apr 29, 2012 6:44 am

I've been using a pair of $20 Aldi digital calipers, and I've used some nice calipers too. You wouldn't pick the difference in accuracy.

Also, a sharpened nail punch would be a lot of fun, I've used a tempered concrete fixing nail to great effect. A rat tail file could be good too, they're bloody hard.
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/sarcasm, /hyperbole
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Unread postAuthor: jackssmirkingrevenge » Sun Apr 29, 2012 10:02 am

Here's an easy slug you (or your mechanic ;)) can make for a 3/4" barrel, all you need is a used CO<sub>2</sub> capsule, chop it up and fill it up to about 25% from the bottom with something heavy.
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Unread postAuthor: Spud Destruction » Sun Apr 29, 2012 1:20 pm

I get phone books all the time sent to my house. I start collecting them now and build some sort of chamber type deal to hold them in place... A lot cheaper then buying a backstop box..
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Unread postAuthor: mattyzip77 » Sun Apr 29, 2012 1:49 pm

jackssmirkingrevenge wrote:
mattyzip77 wrote:Its kinda like sex without an orgasm.. :dontknow:


Rather it's like the "money shot" without looking at the male member :roll:


Yes, thats what I meant!!!
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Go Bruins!!!!
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Unread postAuthor: kotabuuki » Sun Apr 29, 2012 2:37 pm

Spud Destruction wrote:I get phone books all the time sent to my house. I start collecting them now and build some sort of chamber type deal to hold them in place... A lot cheaper then buying a backstop box..


I'd go with that honestly. I know that pre-made targets are quite expensive. I know that old carpeting also works for stopping projectiles. before I could afford archery targets that's what I would use to stop my arrows.
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Unread postAuthor: kotabuuki » Mon Apr 30, 2012 8:10 am

I know in my last post I mentioned using carpeting. I found a link to an example of what I was talking about.

http://www.archerytalk.com/vb/showthread.php?t=857549&highlight=layered+carpet+targe%20t+build
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Unread postAuthor: al-xg » Mon Apr 30, 2012 1:18 pm

Much less effective with faster pointy projectile sadly...
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Unread postAuthor: Fnord » Mon Apr 30, 2012 7:44 pm

JSR has anyone told you you're a genius lately?
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Unread postAuthor: jackssmirkingrevenge » Tue May 01, 2012 2:03 am

*Fantastic* Fnord, in both concept and execution!!!! Great job :D hahahahahaha!
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Unread postAuthor: Spud Destruction » Tue May 01, 2012 11:52 pm

work has been killing me.. And the honey do list finishes me off. hahaha. I will try this weekend to get the 1" pipe and get it measure for you.
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Unread postAuthor: jackssmirkingrevenge » Wed May 02, 2012 3:02 am

Spud Destruction wrote:And the honey do list finishes me off.


With intimidating APFSDS projectils to hand, you will find that list will shrink considerably, unless of course you don't use an adequate backstop and the list fills up with "patch the holes in the garage" type items ;)
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Unread postAuthor: DYI » Wed May 02, 2012 6:49 am

What's this? Has JSR finally found someone new to pick on about inadequate backstops? Surely not! :shock:
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Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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Unread postAuthor: jackssmirkingrevenge » Wed May 02, 2012 6:57 am

No no no, twas a temporary deferral based on chronological deficiency, I was looking for your "incident" but was pressed for time and MrC's misadventure was the first instance to come up in a search for "garage backstop" ;)
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Unread postAuthor: MrCrowley » Wed May 02, 2012 2:23 pm

Haha, I don't mind being made an example of every now and then :D

Fnord, that is brilliant.
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