Search found 26179 matches

by jackssmirkingrevenge
Tue Apr 03, 2007 9:33 pm
Forum: Pneumatic Cannons
Topic: First Pneumatic made by me and integral
Replies: 48
Views: 12495

joannaardway wrote:There is quite a difference between 12 gauge (.72") and 20mm (.79")
Granted, but nothing a little masking tape can't solve :wink:
by jackssmirkingrevenge
Tue Apr 03, 2007 9:29 pm
Forum: Pneumatic Cannons
Topic: cartridge fed pneumatic prototype
Replies: 48
Views: 18108

*whistle*

:wink:
by jackssmirkingrevenge
Tue Apr 03, 2007 1:14 pm
Forum: General How-To & Discussion
Topic: Pressure Ratings
Replies: 13
Views: 1925

Not at all related to pressure, it just means it complies to this standard - so basically, your piece of pipe is safe to drink out of :wink:
by jackssmirkingrevenge
Tue Apr 03, 2007 12:22 pm
Forum: Pneumatic Cannons
Topic: cartridge fed pneumatic prototype
Replies: 48
Views: 18108

i seriously think you are jesus.... Yes, my son, appropriate avatar don't you think :roll: I remember that well. It actually aided and abetted some of my cartridge loading ideas (You may well remember some of what I said in your thread). Yeah, had some time to spare so thought I'd repost some of th...
by jackssmirkingrevenge
Tue Apr 03, 2007 11:22 am
Forum: Ammo & Parts
Topic: Adapting 0.22 airgun pellets for airsoft barrels
Replies: 12
Views: 5070

You don't specifically need a drill bit, just a 6mm rod you can tap on the pellet's head with - and the BB doesn't actually stick to the pellet, it's just there to flare out the skirt of the pellet to match the inner diameter of the barrel.
by jackssmirkingrevenge
Tue Apr 03, 2007 11:17 am
Forum: Ammo & Parts
Topic: Slugs for a 3/4" barrel
Replies: 6
Views: 3322

you could always use some solder instead.
by jackssmirkingrevenge
Tue Apr 03, 2007 9:29 am
Forum: General How-To & Discussion
Topic: c:b ratio to destroy the cannon???
Replies: 12
Views: 2103

Even if you made a chamber without a barrel (but still having a barrel opening) you still wouldn't manage to destroy it... Still, i suppose it is conceivable that a completely sealed chamber would rupture, so I guess what you should be asking is for a chamber volume:barrel diameter ratio.
by jackssmirkingrevenge
Tue Apr 03, 2007 9:25 am
Forum: Ammo & Parts
Topic: Slugs for a 3/4" barrel
Replies: 6
Views: 3322

Slugs for a 3/4" barrel

Take an empty 12 gram CO2 capsule and saw it in half.

Put some lead in the nose, hold it in a pair of pliers and heat it up in a burner until it melts, then let it cool down and solidify.

Wrap some masking tape around the end or slip on the plastic part of a used 12 gauge shotgun cartridge.
by jackssmirkingrevenge
Tue Apr 03, 2007 9:17 am
Forum: Ammo & Parts
Topic: Adapting 0.22 airgun pellets for airsoft barrels
Replies: 12
Views: 5070

Adapting 0.22 airgun pellets for airsoft barrels

It's pretty self explanatory, a couple of light hammer taps on the drill bit and you've got a good fitting heavy projectile that will still fly head first out of a smoothbore barrel due to the shuttlecock shape. If you can find 0.25 pellets, they'll fit in a 6mm barrel without modification.
by jackssmirkingrevenge
Tue Apr 03, 2007 8:34 am
Forum: Pneumatic Cannons
Topic: cartridge fed pneumatic prototype
Replies: 48
Views: 18108

I made it over the space of a week, what takes the longest is waiting the 24 hours the epoxy needs to cure. I was using 110 psi from my compressor (you can see the schrader filling attachment in the last video), never measured the muzzle velocity (I was using 0.22 airgun pellets flared out to fit a ...
by jackssmirkingrevenge
Tue Apr 03, 2007 8:19 am
Forum: Pneumatic Cannons
Topic: First Pneumatic made by me and integral
Replies: 48
Views: 12495

chaos wrote:youd probably have no luck there with that, clay shooters dont use solid slugs
My bad, I meant shotgun wads :oops:
by jackssmirkingrevenge
Tue Apr 03, 2007 7:58 am
Forum: Pneumatic Cannons
Topic: First Pneumatic made by me and integral
Replies: 48
Views: 12495

Hey just wondering if anyone has any good ideas for rounds for a 20mm barrel anything mentioned here for a 3/4" barrel should fit pretty nicely in a 20mm barrel, try marbles and CO2 cartridges, and if there's a clay pigeon shooting range nearby you might want to see if you can scrounge any 12 gauge...
by jackssmirkingrevenge
Tue Apr 03, 2007 7:00 am
Forum: Pneumatic Cannons
Topic: cartridge fed pneumatic prototype
Replies: 48
Views: 18108

cartridge fed pneumatic prototype

edit: the concept has been revisited with much more success here . This was a prototype i made to test a concept of pneumatic cartridge feeding and ejection i had come up with back in glory days of spudtech :roll: I know it looks extremely ghetto but the intention wasn't for it to be pretty, it just...
by jackssmirkingrevenge
Tue Apr 03, 2007 5:21 am
Forum: General How-To & Discussion
Topic: I need your spud gun videos
Replies: 18
Views: 2740

A whole bunch of videos done with my 3/4" pneumatic available here :D
by jackssmirkingrevenge
Tue Apr 03, 2007 5:04 am
Forum: Combustion Cannons
Topic: Cannon designing Team
Replies: 24
Views: 3812

joannaardway wrote:Half a dozen to two dozen people from all over the place (possibly from different countries) wouldn't.
Yeah, look at what they did with Airbus :roll: