Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 71 users online :: 4 registered, 1 hidden and 66 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Squeak's Second(and first practical) Gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Squeak's Second(and first practical) Gun

Unread postAuthor: squeaks » Wed Dec 20, 2006 6:55 pm

Ok, so here it is. It has a 4'10"x3" chamber and a 4'10"x2" barrel. The valve is a 2" porting barrel sealing piston. It has 2 o-rings to increase performance. The sealing face is 2 layers of truck tire tubes held on by a nice big washer and screw. It seals against a 2" coupler cut in half and the stop sanded out(so it would have a nice square sealing face). It's piloted by a 1" ball valve and has a quick connect and 1/4" ball vavle for filling.

Oh, yeah, I forgot to mention that I removed the stop from the tee and sleeved it with 3" pipe so the piston and o-rings have a nice smooth travel the whole way.
  • 0

Attachments
PICT0095.JPG
Here's the pison. I know it only has one o-ring on it right now but I haven't been able to get ahold of some new ones. Therefor it will be o-ringless until I get some(except for this picture)
PICT0094.JPG
Here's a picture of the inside of the tee. You can see the coupler that I glued on to keep it nice and square. It also helps increase the pressure differential once the piston starts moving. Also, you can kindof see the pipe that I sleeved inside of the tee.
PICT0096.JPG
Picture of the fill/exhause/bumper. The fill is a 1/4" ball valve and quick connect, the exhaust is a 1" ball valve, and the bumper is a thick layer of caulk.
PICT0093.JPG
The whole gun disassembled.
PICT0097.JPG
The whole gun assembled.
Last edited by squeaks on Sat Dec 23, 2006 6:28 pm, edited 3 times in total.
"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Unread postAuthor: Bluetooth » Wed Dec 20, 2006 7:16 pm

Thats very very cool! I just made a gun almost exactly like it but i don't think I'll get around to posting it very soon :( .
  • 0

User avatar
Bluetooth
Brigadier General
Brigadier General
 
Posts: 863
Joined: Tue Jun 27, 2006 7:57 am
Reputation: 0

Unread postAuthor: Insomniac » Wed Dec 20, 2006 7:16 pm

Nice! I like it, but isn't that piston a bit heavy? you should drill some holes in the back to hollow it out a bit.
  • 0

User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Unread postAuthor: squeaks » Wed Dec 20, 2006 7:17 pm

Actually the piston is surprisingly light. It's not a hard wood so it's not that bad.
  • 0

"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Unread postAuthor: Bluetooth » Wed Dec 20, 2006 7:17 pm

It's just wood. Some people use solid pvc rod for pistons. One of them is on advance spuds.
  • 0

User avatar
Bluetooth
Brigadier General
Brigadier General
 
Posts: 863
Joined: Tue Jun 27, 2006 7:57 am
Reputation: 0

Unread postAuthor: MrCrowley » Wed Dec 20, 2006 7:48 pm

nice gun, but by making the seat diameter bigger wont the piston be slower as the sealing face diameter isn'that much bigger then the seat diameter.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: experament_u2 » Wed Dec 20, 2006 7:56 pm

awsome gun nice and clean
  • 0

User avatar
experament_u2
1st Lieutenant
1st Lieutenant
 
Posts: 271
Joined: Sun Aug 06, 2006 5:04 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: squeaks » Wed Dec 20, 2006 7:58 pm

Ok, since the seat is rather large there is less air pushing back on the piston. This makes it take much longer for the piston to move when your firing. Once the piston starts to move there is suddenly a large area that the air is pushing against and since most of the air is vented there is little resistance for the pistons movement. By increasing the seat it actually makes it work faster, wahahahahahaha!!!!!
  • 0

"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Unread postAuthor: MrCrowley » Wed Dec 20, 2006 8:19 pm

if you say so,but then you would think they would be even as a small seat piston would start going back before the larger seat piston and then that piston catches up in speed......oh who gives a crap,its only a few miliseconds difference.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: squeaks » Wed Dec 20, 2006 8:25 pm

exactly. Same reason why there really is almost no difference in performance between a chamber sealing and barrel sealing piston. The big reason why chamber sealing ones usually work really well is that they must have o-rings, which also increases performance dramatically. Without the o-rings I can't actuate my piston with a 1/4 ball valve, yet Gort's mauler's easily actuate with that size of valve. Hooray for o-rings.
  • 0

"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Unread postAuthor: MisterSteve124 » Wed Dec 20, 2006 10:32 pm

Nice job! Especially on the piston. It looks great for your first one.
  • 0

User avatar
MisterSteve124
Colonel
Colonel
 
Posts: 702
Joined: Sat Feb 11, 2006 10:11 pm
Location: West Chester, PA
Reputation: 0

Unread postAuthor: squeaks » Wed Dec 20, 2006 10:54 pm

Funny story behind that piston. We got my physics teacher to turn a 4x4 down on a lathe, then we made one o-ring groove with a table saw at my neighbors house, got tired of making 'em that way(and ruining 2 previous pistons made of pvc) and made the second groove on the lathe. Ironically the table saw groove is the better of the two.
  • 0

"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Unread postAuthor: mark.f » Thu Dec 21, 2006 5:57 am

Looks good. Is the wood holding up well?
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3465
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: squeaks » Thu Dec 21, 2006 7:47 pm

Wood holds up great. Plus the caulk pad takes most of the impact.
  • 0

"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway

Borrow money from a pessimist, he won't expect it back.

squeaks
Captain
Captain
 
Posts: 326
Joined: Sun Oct 01, 2006 5:45 pm
Location: Enoch, UT(next to Cedar City)
Reputation: 0

Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'