SpudFiles

G'day spudders,

It's done. The first all poly piston tee-valve on files' *Takes a bow *. I just finished it today. I didn't have the money to get a 25mm ball valve to actuate it, so I just used a 1/2'' ball valve and tapped it into a 25mm poly end cap.

Specs:

Name: - The BFS (Big F@#kin' Sawn-off)
PSI Range: - 5-300psi (yes the gun works at pressues as low as 5psi)
Chamber: - 600mm 1'' Poly Pipe.
Barrel(s): - 600mm 1/2'' PN18 Pressure pipe
- 1000mm 1/2'' PN18 Pressure pipe
Piston: - Cast hot glue.
Piston travel: - 30mm.

Pic time!

it looks good, but didnt you post this yesterday?

That's the finished model. Yesturday was just the prototype.

nice looking gun . Don't want to sound dumb, but is that other thing you picture in your photos a homemade pump?

Yes mate it sure is . My bike pump broke so I'm forced to use my homemade high pressure pump. I built this gun for 300+psi and with my pump, It's a reality .


....Only problem is the pump's low volume. It takes me 25 pumps to get to 100psi.

Nice!!! I like the way your "whammy" style grip looks.
I also like the copper barrel. And the name (BFS).
Good job Mitchza89

Hope to see more pics if you polish 'er up/ paint. 8)

EDIT:Forgot to ask: So you open the trigger and fill through the handle then close the trigger and disconnect the fill right? Thanks Mitch

Thanks very much for that mate . I just spun the air chamber around 180' and it makes the perfect stock. The valve setup sits a fraction higher then the stock so everything feels so comfy to hold.

Thank you buddy this is so simple yet I never would have thought about it a nice tune-able valve nice idea, this will so be in my next gun!!!!

Thank you very much mate. That was the thing I loved about this valve. I was able to set how much pilot I had by tightening the sealing face tube and bringing it closer to the piston housing. It doesn't matter on how long or short your piston is (by a stuff up or not), you can always make an efficient valve by simply tightening or loosening the tube.



Thunderlord, yes mate. I fill and pilot the gun through the ball valve. I had leaking problems with schrader valves and blowguns at high pressures, so I thought I'd kill 2 birds with one stone (wrong thing to say in a spudgun forum....) and get one valve that can do all I want it to.

Sorry to dump the thread but what does everyone think of this new look for the gun??

Hey Mitch.

Aren't you just the prolific one lately?

That'll look great, I really like the ergo's!

I do try my best Gippeto. How's you're monster of a Coax going?

nice one mitch!

that is a really good and compact cannon!

nice gun I like it
why isn't there a thing to place your foot at the pump?

Nifty little sawn-off rifle there Mitchza. You don't see poly used very often...nice innovation there.

Good job!