Page 1 of 3
Bolt Action Musket
Posted: Mon May 17, 2010 4:40 pm
by Lockednloaded
This is really more of a side build for me, but I think it looks nice nonetheless. It is a spare parts gun with the valve reconfigured from my old semi-auto shotgun. Here's some specs:
SPECIFICATIONS:
CHAMBER-1" pvc
VALVE- super modified sprinkler valve (new diaphragm)
BARREL- about a foot of 3/4" pvc
PILOT VALVE- 1/4" 125psi pop-off.
Now its picture time!
Posted: Mon May 17, 2010 5:07 pm
by deathbyDWV
That looks kinda like my first pneumatic gun... I like how you set up the pop off as the trigger... I've always kinda wanted to do that with a longer string for my big cannon so i can fire it artillery style...
Posted: Mon May 17, 2010 5:15 pm
by Gun Freak
Is the breech housed in 1.25" pvc?
Posted: Mon May 17, 2010 5:41 pm
by Lockednloaded
The great thing about the pop off pilot is that it works well for a poor man's semi, and has full 1/4" flow.
Yes the breech is housed inside 1 1/4", i recommend it for 3/4" breech loaders, great fit
P.s.
would anyone like a picture of the new diaphragm, i just opened it up, so now or never
Posted: Mon May 17, 2010 5:50 pm
by Gun Freak
yeah
afkldsfhakldfhakld
Posted: Mon May 17, 2010 5:54 pm
by Lockednloaded
Gun Freak, if you hold down space it makes the message long enough
Here it is, it greatly increases flow, no spring and less dead weight
The spring is just for comparison
sealing face:
Back support washer
Posted: Mon May 17, 2010 7:03 pm
by Gun Freak
So does the pressure of the screws tightening hole the diaphragm in place enough to seal the air pressure too? Or do you use an o-ring around the groove of the sprinkler?
Posted: Mon May 17, 2010 7:19 pm
by Lockednloaded
the diaphragm is free standing inside the valve. For sealing the cap i just cut the o'ring off the original diaphragm.
Posted: Mon May 17, 2010 7:22 pm
by Gun Freak
How does it seal if it is free standing? I'm confused
Posted: Mon May 17, 2010 7:48 pm
by Lockednloaded
the diaphragm is filled from the back, the air pressure pushes it against the pipe inside the valve. or are you asking about the cap?
maybe free-standing is the wrong word...
Posted: Mon May 17, 2010 7:49 pm
by Gun Freak
Oh ok so it isn't touching the seat until filled.
Posted: Mon May 17, 2010 8:00 pm
by Lockednloaded
yea, pretty much like a piston
It yields much more power than your average sprinkler, and can take up to 200 psi, but I won't be doing that any time soon, my bike pump died and i can't get a new one until school ends.
Posted: Mon May 17, 2010 8:04 pm
by Gun Freak
well the gun is pvc anyway, 200 psi wouldnt be safe.
Posted: Mon May 17, 2010 8:08 pm
by Lockednloaded
pvc should be safe to 200 psi, most people dont trust it to anywhere near its rated pressure because of its "failure mode" I trust my solvent weld, but i cannot take it past 125 because of my trigger
Posted: Mon May 17, 2010 8:09 pm
by Gun Freak
well put a blowgun on there and you're set