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| STHORNE |
 Posted: 05/11/2008 17:19 PM Post subject: BB/Marble Rifle Design |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
475.04 Spud Bux
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Hello fellow spudders!
I am really eager to make myself a marble rifle. I have made plans and have all the supplies to make it.
My question is:
Will I be using it's power to its full potential using this design?
With that being said, here are the facts about my design:
It's going to have a piston valve assembly
It's going to have a homemade stock (which so far looks awesome!)
It's going to mimic the appearance of a real Rifle (the most it can be)
Already have the marble barrel made...its a perfect fit!
Here's a labeled pic of my design, tell me what you think...
Click on the pic for a better view of the numbers
P.S. - All internals that over-lap the stock in the pic will be hidden inside the stock...
| Description: |
1. Marble barrel
2. Breech loading mechanism
3. Copper air tank (1/2" receiver)
4. (1 of 2) 1/2" T-fittings
5. 1/2" ball valve
6. 1/4" Quick Connect nipple
7. 1/4" hose barb adapter
8. 1/4" pressure hose
9. modified blowgun
10. Scope
11. Homemade Stock
12. Piston |
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Last edited by STHORNE on 05/15/2008 16:52 PM; edited 2 times in total |
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| ilovetoblowthingsup |
| Posted: 05/11/2008 17:23 PM Post subject: |
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Brigadier General
Joined: 30 Mar 2007
Posts: 822
1491.90 Spud Bux
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i say scrap the hose, replace it with brakeline, maybe hide the blowgun in the stock or replace it with a ball valve with a trigger handle ( see mitchza89s third boomstick)
will help with aesthetics.
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| STHORNE |
| Posted: 05/11/2008 17:28 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
475.04 Spud Bux
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| well...i have a different style blowgun that will look awesome on it, i just made that one (basic design) so you guys knew what the hell I was talking about lol.
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| Lentamentalisk |
| Posted: 05/11/2008 17:33 PM Post subject: |
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Resident Tinkerer
Joined: 07 Aug 2007
Posts: 614
209.68 Spud Bux
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| if you use quick disconects, rather than schraeder valves, then you can just stick the female side on the gun and leave out the ball valve. come to thing of it, you dont need that ball valve at all, schraeders dont let any back flow.
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| spudmatic |
| Posted: 05/11/2008 17:34 PM Post subject: |
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Private First Class
Joined: 11 Apr 2008
Posts: 32
85.87 Spud Bux
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You will probably become the envy of everyone on spudfiles if you can pull this off(including me  . How big of a chamber do you expect to fit in there? A psi guess?
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| STHORNE |
| Posted: 05/11/2008 17:54 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
475.04 Spud Bux
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| Lentamentalisk wrote: | | if you use quick disconects, rather than schraeder valves, then you can just stick the female side on the gun and leave out the ball valve. come to thing of it, you dont need that ball valve at all, schraeders dont let any back flow. |
I was thinking using the female instead of the male "nipple" (not schreader), but when you disconnect it from the compressor hose, it gives off maybe 4-6 psi, so I was just thinking as accurately as possible but I will probably end up doing that, and using the female Quick connect rather than the male nipple.
| spudmatic wrote: | | You will probably become the envy of everyone on spudfiles if you can pull this off(including me Cool . How big of a chamber do you expect to fit in there? A psi guess? |
"you can pull this off?"
Ha Ha Ha, let me correct you...."when you pull this off." lol
what do you mean "how big of a chamber do you expect to fit in there?"
what is "there"? Anyway, I plan on taking it to the highest psi i can with my 120psi air compressor (psst....that means 120psi).
Oh! and ilovetoblowthingsup, I took a pic of the blowgun I plan to use. The red line is where I plan to cut it to optimize space.
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| spudmatic |
| Posted: 05/11/2008 18:07 PM Post subject: |
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Private First Class
Joined: 11 Apr 2008
Posts: 32
85.87 Spud Bux
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You did say that all internals that overlap the stock will be hidden inside, and if im correct thats your chamber there under the barrel. 
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| STHORNE |
| Posted: 05/11/2008 18:10 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
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| Oh yeah. yes, it will also be hidden inside the stock handle, in my drawing the stock isn't quite low enough to completely cover the bottom, but the real stock will cover it, and will only have about an inch of the end sticking out.
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| POLAND_SPUD |
| Posted: 05/11/2008 19:53 PM Post subject: |
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Colonel
Joined: 13 Oct 2007
Posts: 619
1444.19 Spud Bux
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| I don't recomend using female quick connect fittings... they loose as lot of air when diconecting esspecialy at higher pressures
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| FordGtMan |
| Posted: 05/11/2008 22:06 PM Post subject: |
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1st Lieutenant
Joined: 25 Oct 2007
Posts: 251
188.37 Spud Bux
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Looks good so far. I had my own efforts doing this and i have not got around to nearly finishing it. I say scrap the air tank on there and base the chamber on 1/2" copper pipe. be much easier to fit the stock into the design. Heres was my design...
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| STHORNE |
| Posted: 05/12/2008 16:02 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
475.04 Spud Bux
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very nice design ford. I'm starting to lean towards the 1/2" copper pipe chamber instead of the tank..... it would be easier to fit in the stock.
nice idea, thanks
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| FordGtMan |
| Posted: 05/12/2008 16:34 PM Post subject: |
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1st Lieutenant
Joined: 25 Oct 2007
Posts: 251
188.37 Spud Bux
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Thanks. Hope to see you finish it. You should make a high pressure pump to make up for the smaller chamber too 
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| Hawkeye |
| Posted: 05/12/2008 17:14 PM Post subject: |
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Major
Joined: 21 Jan 2007
Posts: 353
985.20 Spud Bux
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You should have the fill behind the piston since it will tend to seal more reliably.
You could very easily build a high pressure pump into the stock and pump the gun vertically up and down like an old style "Bate(?)" air rifle.
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| STHORNE |
| Posted: 05/12/2008 20:43 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1160
475.04 Spud Bux
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I'll think about the high pressure pump...
thanks guys 
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| ilovetoblowthingsup |
| Posted: 05/13/2008 7:33 AM Post subject: |
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Brigadier General
Joined: 30 Mar 2007
Posts: 822
1491.90 Spud Bux
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| i say go with 1/2" copper for chamber... then a high pressure pump or CO2- speaking of which can copper hold 800 PSI?
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