4" Piston Valve

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Post Reply
Novacastrian
Staff Sergeant 2
Staff Sergeant 2
Posts: 1603
Joined: Sat Aug 11, 2007 6:59 pm
Been thanked: 1 time

Mon Mar 17, 2008 4:51 am

This is a creation that i like to call "Boogaloo", It means fast in some giberish.(thanks Gipetto)
:D
That's right, a 4 inch "power house" with 33.7mm porting. It was designed to accept many calibres, from 33.7mm down to 6mm. It is around 1.5 litres.

I tried to pilot this with a 1/4" ball valve with no success, 1/2"ball valve does well though and makes it a loud mo-fo.
I operate this at around 95 psi.
Did i mention that it leaks? I could fix the leaks but i really can't be bothered with 10psi over 20 seconds. :roll:
Image
Boogaloo
Image
Front on- you can see the piston face...just.
Image
assortment of 33.7mm ammo.
Image
piston
Image
Bumper/endcap.
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
Top
User avatar
Cosmic Muffin
Specialist 2
Specialist 2
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere

Mon Mar 17, 2008 5:13 am

OMG are you insane? :shock: that ammo looks like it could take out an elephant and im being serious there. that is soooo kool the bumper looks like ballistics gell what is it? :?. hehe i wish i had one of those :D how good is the range?
Top
Novacastrian
Staff Sergeant 2
Staff Sergeant 2
Posts: 1603
Joined: Sat Aug 11, 2007 6:59 pm
Been thanked: 1 time

Mon Mar 17, 2008 5:20 am

Hey Muff, the bumper is made from Polyurethane, as is the sealing face.
IDK about range, i lobbed a 400grm piece of metal today about 70metres at a 40degree angle, the recoil is really nice :P

The range of my similar sized combustion was around 100 metres max, i suspect with the right barrel and ammo i could achieve around 200 metres, a t 95 psi that is. :roll:
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
Top
User avatar
Cosmic Muffin
Specialist 2
Specialist 2
Posts: 275
Joined: Mon Jan 14, 2008 10:30 pm
Location: arse end of nowhere

Mon Mar 17, 2008 5:46 am

Muff ay? lol nothing like a bit of humour amongst fellow Aussies
theat sounds pretty good do you rekon you could kill and elephant with that ?. nice gun it looks hell pro. onya buddy
Top
User avatar
psycix
Sergeant Major 4
Sergeant Major 4
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands

Donating Members

Mon Mar 17, 2008 5:51 am

Whoa that is a clean construction!
And your ammo is even more nice!

Had some fun with a lathe?? :)
Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
Top
User avatar
SpudFarm
First Sergeant 3
First Sergeant 3
Posts: 2571
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area

Donating Members

Mon Mar 17, 2008 5:54 am

WOW i wonder what these bullets can do from a proper built hybrid :shock:
and 70m for a 400g protectile is AWESOME!!!
"Made in France"
- A spud gun insurance.
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26179
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 543 times
Been thanked: 321 times

Donating Members

Mon Mar 17, 2008 6:09 am

Very nice, though again, shame about the small chamber. where does it leak from, barrel or endcap? If it's from the barrel, why not just bolt on a neoprene disk to the piston the old fashioned way?
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
User avatar
pizlo
Corporal 3
Corporal 3
Posts: 783
Joined: Fri Dec 22, 2006 7:27 pm
Contact:
Contact pizlo

Mon Mar 17, 2008 6:09 am

Damn could I convince you do make a tut on casting poly? please?
Top
User avatar
Mitchza89
Sergeant
Sergeant
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am

Mon Mar 17, 2008 7:22 am

:shock: .......................................................................

Yeah that says it all... God damn it dude... Well done.................
Image
Top
User avatar
watto
Specialist 3
Specialist 3
Posts: 327
Joined: Wed Dec 13, 2006 5:47 pm
Location: Australia

Mon Mar 17, 2008 8:13 am

very impressive
Top
Rokmonkey
Private 4
Private 4
Posts: 73
Joined: Wed Feb 28, 2007 10:03 pm

Mon Mar 17, 2008 9:05 am

That....ammo....is....evil....


Great work, looks amazing!
Top
User avatar
Gippeto
First Sergeant 3
First Sergeant 3
Venezuela
Posts: 2503
Joined: Sat Jan 19, 2008 10:14 am
Location: Soon to be socialist shit hole.
Has thanked: 2 times
Been thanked: 17 times

Donating Members

Mon Mar 17, 2008 9:26 am

Once again Nova, Very nicely done. :)

I see you have LARGE caliber pimpin ammo too. :D

Leaking from the screws on the end-cap?
"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
Top
Novacastrian
Staff Sergeant 2
Staff Sergeant 2
Posts: 1603
Joined: Sat Aug 11, 2007 6:59 pm
Been thanked: 1 time

Mon Mar 17, 2008 2:47 pm

Thanks for the comments guys. Pizlo i would make a tutorial, however i am not even sure that you can buy the same Poly as i use.
As for the leaking i don't think that the sealing face is leaking, i'll check today. The other leaks are from the endcaps and will be fixed when i can be bothered :P
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
Top
User avatar
pizlo
Corporal 3
Corporal 3
Posts: 783
Joined: Fri Dec 22, 2006 7:27 pm
Contact:
Contact pizlo

Mon Mar 17, 2008 2:56 pm

Even if you could make a tut on the molds, and casting process, I'm sure it would be appritiated. what polly do you use, and what type for the white parts?
Top
Novacastrian
Staff Sergeant 2
Staff Sergeant 2
Posts: 1603
Joined: Sat Aug 11, 2007 6:59 pm
Been thanked: 1 time

Mon Mar 17, 2008 5:39 pm

I use different hardness Poly for different applications
http://www.erapol.com.au/# There is a link with more info.
As for the white plastic it is Acetal, a hard plastic that is easy to machine.

JSR went to a great deal of trouble making a tutorial for casting Epoxy, the same methods can be used to cast the Poly. (And it gets me out of making a tutorial) :D
Last edited by Novacastrian on Mon Mar 17, 2008 8:31 pm, edited 1 time in total.
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
Top
Post Reply

Return to “Pneumatic Cannons”