My GB cannon is done! ( UPDATED!!!) now with damage pics
- unisonmind
- Specialist
- Posts: 118
- Joined: Wed Jan 24, 2007 9:25 pm
after being out of town for a lot longer then i wanted. its done and it has more power then any of my guns to date. this is gun #6 and my 2nd piston valve. i went up to the mountains today to test out the power. i ran it at 150 psi and i could barely see the GB's come out and they were out of view in no time.i had some 2'x4' strips of 3/4'' plywood and a few 2''x4''x12'' in the bed of my truck from a job i did and with the plywood it would blow 3'' holes in it like nothing and from about 20' it would break the 2''x4'' in half 4 out of 5 time and the 5th was hanging on by all most nothing but everyone tell me what you think about it
specs:
-2 1/2'x3'' chamber
-4' GB barrel sdr21 & sch80
-the piston is a pill bottle filled
with foam
-valve is 2'' tee with a 1 1/2'' port
-pilot is a 1/4'' ball valve
so i just got done with the paint job and i got all the small bugs out of the valve so i put the QEV back on it gives it a little more power
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all shots where at 65psi
front
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure137.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
back
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inside back
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure140.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
inside front
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure141.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
specs:
-2 1/2'x3'' chamber
-4' GB barrel sdr21 & sch80
-the piston is a pill bottle filled
with foam
-valve is 2'' tee with a 1 1/2'' port
-pilot is a 1/4'' ball valve
so i just got done with the paint job and i got all the small bugs out of the valve so i put the QEV back on it gives it a little more power
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure100.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure127.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure130.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure126.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure096.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
all shots where at 65psi
front
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure137.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
back
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure138.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
inside back
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure140.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
inside front
<a href="http://photobucket.com" target="_blank"><img src="http://i87.photobucket.com/albums/k154/ ... ure141.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
Last edited by unisonmind on Tue Oct 30, 2007 2:15 pm, edited 4 times in total.
THE DIFFERENCE BETWEEN A FLOWER AND A WEED IS A JUDGEMENT
very nice! looks like u have all the hard to find most wanted stuff: 2 1/2" pipe, sdr21, sch 80! sweet!!! btw do u patch the golfballs?
- unisonmind
- Specialist
- Posts: 118
- Joined: Wed Jan 24, 2007 9:25 pm
MrCrowley- ya i do need to make a barrel support when i was in the mountains testing i used a sock and a bungee cord.- on the back plug i have a o-ring that is a real tight fit in the tee
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Spuddin-sorry but i have no clue what you mean by patch the golfballs and i dont have any 2 1/2'' pipe its 3'' and the barrel is 1 1/2'' sdr21 & 2'' sch80
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Spuddin-sorry but i have no clue what you mean by patch the golfballs and i dont have any 2 1/2'' pipe its 3'' and the barrel is 1 1/2'' sdr21 & 2'' sch80
THE DIFFERENCE BETWEEN A FLOWER AND A WEED IS A JUDGEMENT
- unisonmind
- Specialist
- Posts: 118
- Joined: Wed Jan 24, 2007 9:25 pm
there is a grove for the o-ring and i use the treads as a back stop
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THE DIFFERENCE BETWEEN A FLOWER AND A WEED IS A JUDGEMENT
- jackssmirkingrevenge
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straightforward, clean, good job - that looks like it could produce some damage worth posting *hint hint*
hectmarr wrote:You have to make many weapons, because this field is long and short life
Hi,
Very nice cannon! A little smaller than the last one I made, but apparently more powerful! I like the simplicity and efficiency of your ball valve trigger.
Don't you have the same problem as me; the bolt holes in the tee chipping off th o-ring when putting in the plug?
Well done.
Regards
Soren
Very nice cannon! A little smaller than the last one I made, but apparently more powerful! I like the simplicity and efficiency of your ball valve trigger.
Don't you have the same problem as me; the bolt holes in the tee chipping off th o-ring when putting in the plug?
Well done.
Regards
Soren
- jackssmirkingrevenge
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Presumably you could put a bevelled edge on the bolt holes to alleviate this problem?dongfang wrote:Don't you have the same problem as me; the bolt holes in the tee chipping off th o-ring when putting in the plug?
hectmarr wrote:You have to make many weapons, because this field is long and short life
- unisonmind
- Specialist
- Posts: 118
- Joined: Wed Jan 24, 2007 9:25 pm
i just take the bolts all the way out of the tee when i need to get to the piston
THE DIFFERENCE BETWEEN A FLOWER AND A WEED IS A JUDGEMENT
Hi Jack,
It´s hard to bevel that thing from the inside, but I managed to grind them a little smoother with the Dremel. Still chips the rings though. But heck, they stay airtight even with some chips in them. Right now, I just let it happen when removing the plug, and carefully adjust in the bolts to make a smooth surface in there when putting it back in.
Regards
Soren
It´s hard to bevel that thing from the inside, but I managed to grind them a little smoother with the Dremel. Still chips the rings though. But heck, they stay airtight even with some chips in them. Right now, I just let it happen when removing the plug, and carefully adjust in the bolts to make a smooth surface in there when putting it back in.
Regards
Soren