Search found 498 matches

by jhalek90
Mon Sep 19, 2011 11:02 am
Forum: Pneumatic Cannons
Topic: wip KRISS smg.
Replies: 28
Views: 2221

The abs plastic is actually leftover shelving from a grocery store where I work. Can u say free? I had a detent on the barrel, consisting of a .177 cal bb protruding into the barrel, and in place by some latex tubing over the barrel. For some reason this seems to smash the crap out of the bbs, and t...
by jhalek90
Mon Sep 19, 2011 9:29 am
Forum: Pneumatic Cannons
Topic: My Collection of Fun
Replies: 16
Views: 2311

For a piston in a 2'' coaxial chamber, a simple rubber cork can be used.

nothing like a 1 piece piston, made of solid rubber.

http://www.widgetco.com/10-rubber-stoppers-plugs
here you go, less than 3 bucks for 1.
by jhalek90
Mon Sep 19, 2011 9:18 am
Forum: Pneumatic Cannons
Topic: wip KRISS smg.
Replies: 28
Views: 2221

Here is another photo with a cloud chamber attached. The Pop of valve pulses the air, and further agitates the BB's. Ive found i get 2-3 BB's per pulse pretty reliably. This is currently 6mm, and hold about 50 bbs, but i do have a .177 barrel for it as well. http://img535.imageshack.us/img535/3896/k...
by jhalek90
Sun Sep 18, 2011 2:33 pm
Forum: Pneumatic Cannons
Topic: wip KRISS smg.
Replies: 28
Views: 2221

the chamber is inside the mag well... or where the KRISS has its special recoil system. I will upload a firing video in when i get a chance. The trigger mec is functional now 8) http://img683.imageshack.us/img683/2673/photosep1821621pm.jpg rubber band was for testing, there is space inside for a spr...
by jhalek90
Sun Sep 18, 2011 10:19 am
Forum: Pneumatic Cannons
Topic: wip KRISS smg.
Replies: 28
Views: 2221

wip KRISS smg.

Just thought i would show you all my latest project. Still a very early wip. the design is based on the KRISS smg. planned caliber is 6mm for airsoft. http://img683.imageshack.us/img683/2673/photosep1821621pm.jpg The body was just roughed out, and is made from a black ABS plastic, about 1'' thick. o...
by jhalek90
Sun Sep 18, 2011 7:05 am
Forum: Hybrid Cannons
Topic: hybrid cartridge protoype without burst disk
Replies: 591
Views: 50560

i tried, what looks to be a similar sized oring, with a .177 BB in a penu, I was unable to get it to pop at 1000 psi... and stopped there.

I am very surprised that it did not pop at 3000 psi though!
by jhalek90
Sun Sep 18, 2011 6:48 am
Forum: Off-Topic Hobbies
Topic: Time for a new cell phone...looking for recommendations.
Replies: 37
Views: 1529

Let me explain jailbreaking a bit more. By default, apple phones can only install software that has been digitally signed by apple. People who write apps, and other software for the iphone, must have it "signed" or approved by apple, before the iphone/ipod will run the software. There is some VERY g...
by jhalek90
Sat Sep 17, 2011 9:59 am
Forum: Off-Topic Hobbies
Topic: Time for a new cell phone...looking for recommendations.
Replies: 37
Views: 1529

If you feel like doing a bit of work for your phone... the iphone 4 is pretty good. However, in order to make the phone worth while... you will need to jailbreak it. once jailbroken, you can do so much more with it... such as use it as a wifi broadcaster, and get online with your laptop... using you...
by jhalek90
Thu Sep 15, 2011 6:51 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: RJB INDUSTRIES: BBMG vortex (CNC made vortex block)
Replies: 20
Views: 4077

Jeremy, again, we DON'T have decent pvc tubes here. Unless your homes and buildings are plumed with square tubing.... i dont see why you would have any trouble finding "tubes" You obviously have access to a CNC mill.... im sure you can find/get some tube stock.... The block looks great... the rest ...
by jhalek90
Wed Sep 14, 2011 9:49 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2415
Views: 171683

[quote="jackssmirkingrevenge" Was that last one intentional :D[/quote] Sadly no. :shock: I made an assumption (Doh!) :oops: that a foot of ballistics gel would stop the round.... i guess a heavy stainless steel dart (1/4" diameter) traveling at high speeds is hard to stop.... haha Also, the 300-350p...
by jhalek90
Wed Sep 14, 2011 5:26 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2415
Views: 171683

ITWOST, tested a dart, designed for penatration, and found that with HPA It was quite happy going through 12" of ballistics gel, and my steel toolbox...
by jhalek90
Tue Sep 13, 2011 8:37 pm
Forum: Pneumatic Cannons
Topic: Anyone use a 2" valve before??
Replies: 41
Views: 2242

[youtube]http://www.youtube.com/watch?v=fVOoSqoJUeo&feature=channel_video_title[/youtube] This is a 1.9'' porting cannon... that video shows no barrel, and no projectile, at 100 psi. The cannon weight in at 65lbs. with a barrel, and i refuse to shoulder mount it at anything above 35psi. I fired it o...
by jhalek90
Tue Sep 13, 2011 1:20 am
Forum: Pneumatic Cannons
Topic: Valve suggestions
Replies: 12
Views: 800

A burst disk would be your best option. Get a 2" PVC union...place it between your chamber and barrel. Use the union to hold a bust disk (a few layers of aluminum foil would be fine) and add pressure. Once you apply more pressure than your disk can hold, the disk will break and the cannon will fire....
by jhalek90
Mon Sep 12, 2011 5:06 pm
Forum: General How-To & Discussion
Topic: Ballistics Gel test video. BBMG/PVC coax/ HPA piston valve.
Replies: 12
Views: 1688

Wow, I thought that tutorial was long forgotten by now. Good to see that people are still finding it to be useful.:) Thanks to the "random cannon" button i just discovered your tutorial last week. Its a good tutorial. thanks :) As for the red food coloring... i thought the off yellow color looked k...
by jhalek90
Mon Sep 12, 2011 4:55 pm
Forum: Ammo & Parts
Topic: My ammo
Replies: 20
Views: 1652

I broke a 2'' porting (4'' chamber) PVC coax piston cannon using to heavy of a projectile at 65 psi :oops:

just remote fire it and you will be fine.