Search found 1571 matches

by iknowmy3tables
Wed Sep 19, 2018 5:53 am
Forum: Pneumatic Cannons
Topic: Starting a new build
Replies: 19
Views: 1447

Re: Starting a new build

should be okay, you still wanna make sure your ammo is ahead of the valve outlet while keeping the dead space to a minimum. a lot of designs like the coaxial gun in the website banner used built in ram rods to push ammo into the correct side pipe fittings A lot of other breech designs incorporated t...
by iknowmy3tables
Mon Sep 17, 2018 10:28 am
Forum: Pneumatic Cannons
Topic: coupler burst disk M72 law
Replies: 4
Views: 570

Re: coupler burst disk M72 law

Yeah I shrunk the burst disk size to in theory increase rupture pressure and have less burst disk material overall all to hopefully make this more reliable. this method for burst disks is pretty limited and can only handle 3 layers of foil at most, also with friction alone holding the pipe I thought...
by iknowmy3tables
Sun Sep 16, 2018 10:02 pm
Forum: SpudFiles Discussion
Topic: Forum layout and "wasted" screen space
Replies: 8
Views: 1556

Re: Forum layout and "wasted" screen space

I think it's more that the text in posts would be harder to read in a wide format, if I wrote several paragraphs with use of the full screen and same text size as you pan you view back over to start the next line you loose track of which line you were on. I just wish the boxes on the left were more ...
by iknowmy3tables
Sun Sep 16, 2018 3:01 pm
Forum: Pneumatic Cannons
Topic: coupler burst disk M72 law
Replies: 4
Views: 570

Re: coupler burst disk M72 law

I finally got a chance to update this project, i changed it to a 1.5" chamber with a .5" coupler and pipe for the burst disk, this seems to preform fine even just with one layer of foil. https://i.imgur.com/v4iU1Ao.jpg https://i.imgur.com/U1IDKu6.jpg https://i.imgur.com/lQQg3Jw.jpg https://i.imgur.c...
by iknowmy3tables
Wed Sep 12, 2018 7:49 pm
Forum: Pneumatic Cannons
Topic: Pneumatic RC Plane Launcher
Replies: 10
Views: 612

Re: Pneumatic RC Plane Launcher

that "piston setup" seem like a better idea than stuffing it in the barrel, the extra weight of the piston would stabilize the acceleration. not to mention you'd still have a decent spudgun when you're finished
by iknowmy3tables
Wed Sep 12, 2018 4:38 am
Forum: Miniature Guns
Topic: New pengun
Replies: 53
Views: 13351

Re: New pengun

You're not the only one
by iknowmy3tables
Sun Sep 09, 2018 10:24 pm
Forum: Combustion Cannons
Topic: Rifle to combustion double camera, caliber 4.75 mm
Replies: 2
Views: 1078

Re: Rifle to combustion double camera, caliber 4.75 mm

nice build, what do you mean by a "double combustion chamber system"
by iknowmy3tables
Sun Sep 09, 2018 10:28 am
Forum: Ammo & Parts
Topic: 2" Hunter Sprinkler Valve for Sale
Replies: 2
Views: 950

Re: 2" Hunter Sprinkler Valve for Sale

Couldn't pm for some reason but I'll offer $30 plus whatever the shipping estimate is
by iknowmy3tables
Sat Sep 08, 2018 12:43 pm
Forum: Pneumatic Cannons
Topic: Party Popper dissection (disposable pneumatic)
Replies: 1
Views: 367

Party Popper dissection (disposable pneumatic)

hello folks I recently bought some disposable confetti cannons to see if they could be used to launch nerf footballs in airsoft mil sim events. you can see a video of my test here [youtube]https://youtu.be/8vgTugv6Stk[/youtube] https://i.imgur.com/wyQI9mj.jpg it seems to work pretty well, but I deci...
by iknowmy3tables
Sat Sep 01, 2018 9:06 am
Forum: Pneumatic Cannons
Topic: Pilot Valve for QEV - JSR's $20 Semi-Auto BB Gun Question
Replies: 4
Views: 1130

Re: Pilot Valve for QEV - JSR's $20 Semi-Auto BB Gun Questio

If I'm not mistaken a lot of 3 way control valves are already internally pneumatically actuated. Mostly the ones with very easy to actuate switches or solenoids, if you buy one with 1/4" or larger ports you probably have a perfectly adequate opening speed for a small airsoft or Nerf gun build. I bou...
by iknowmy3tables
Fri Aug 31, 2018 10:54 pm
Forum: Pneumatic Cannons
Topic: coupler burst disk M72 law
Replies: 4
Views: 570

Re: coupler burst disk M72 law

well it appears I made some progress, I bought some Reynolds wrap heavy duty foil wrapped my nerf footballs with some masking tape and squeezed it into 1.5" pvc so far I learned I can loosen the coupler fit to handle more layers of foil just by rubbing the pipe with acetone https://i.imgur.com/oFtxt...
by iknowmy3tables
Fri Aug 31, 2018 8:48 pm
Forum: Pneumatic Cannons
Topic: Grappling Hook Launcher
Replies: 2
Views: 445

Re: Grappling Hook Launcher

nice work, would be a great tool for starting a rope swing. sensible safety advice would say to never actually use a grappling hook for climbing, but I have to admit I haven't followed that advice 100% so I find leaving the rope in a double strand and tying a figure 8 knot every few feet is the best...
by iknowmy3tables
Fri Aug 31, 2018 4:47 pm
Forum: Pneumatic Cannons
Topic: coupler burst disk M72 law
Replies: 4
Views: 570

coupler burst disk M72 law

Hey spudfiles long time no see, http://www.spudfiles.com/pneumatic-cannon-database/topic24557.html my at4 recently died on me, I'm not sure how but the toolies valve piston got bent and permanently lodged itself in the gun. I don't have access to a lathe anymore to remake it so in the mean time I th...
by iknowmy3tables
Fri Feb 12, 2016 6:41 pm
Forum: Pneumatic Cannons
Topic: Semi auto loader mechanism: will it work?
Replies: 4
Views: 1424

Re: Semi auto loader mechanism: will it work?

it looks like you are trying to build a gas operated loading mechanism based on a gas operated mechanism in a real gun. what you need to understand is that gas operated guns were originally invented as a cycling mechanism for guns that shot full power rifle ammo where there was too much pressure for...