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4" Piston Valve
Posted: Mon Mar 17, 2008 4:51 am
by Novacastrian
This is a creation that i like to call "Boogaloo", It means fast in some giberish.(thanks Gipetto)
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.
Boogaloo
Front on- you can see the piston face...just.
assortment of 33.7mm ammo.
piston
Bumper/endcap.
Posted: Mon Mar 17, 2008 5:13 am
by Cosmic Muffin
OMG are you insane?
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
how good is the range?
Posted: Mon Mar 17, 2008 5:20 am
by Novacastrian
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
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.
Posted: Mon Mar 17, 2008 5:46 am
by Cosmic Muffin
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
Posted: Mon Mar 17, 2008 5:51 am
by psycix
Whoa that is a clean construction!
And your ammo is even more nice!
Had some fun with a lathe??
Posted: Mon Mar 17, 2008 5:54 am
by SpudFarm
WOW i wonder what these bullets can do from a proper built hybrid
and 70m for a 400g protectile is AWESOME!!!
Posted: Mon Mar 17, 2008 6:09 am
by jackssmirkingrevenge
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?
Posted: Mon Mar 17, 2008 6:09 am
by pizlo
Damn could I convince you do make a tut on casting poly? please?
Posted: Mon Mar 17, 2008 7:22 am
by Mitchza89
.......................................................................
Yeah that says it all... God damn it dude... Well done.................
Posted: Mon Mar 17, 2008 8:13 am
by watto
very impressive
Posted: Mon Mar 17, 2008 9:05 am
by Rokmonkey
That....ammo....is....evil....
Great work, looks amazing!
Posted: Mon Mar 17, 2008 9:26 am
by Gippeto
Once again Nova, Very nicely done.
I see you have LARGE caliber pimpin ammo too.
Leaking from the screws on the end-cap?
Posted: Mon Mar 17, 2008 2:47 pm
by Novacastrian
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
Posted: Mon Mar 17, 2008 2:56 pm
by pizlo
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?
Posted: Mon Mar 17, 2008 5:39 pm
by Novacastrian
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)