B.S.R. 75 breech loading bolt action spud gun

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
spudrouge420
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Sat Aug 07, 2010 5:37 am

youtube video....
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Last edited by spudrouge420 on Sun Aug 08, 2010 3:51 pm, edited 1 time in total.
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Stolly32123
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Sat Aug 07, 2010 5:40 am

Wow. that looks beautiful. any chance of some more picks and detail?
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chinnerz
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Sat Aug 07, 2010 6:18 am

Stolly32123 wrote:Wow. that looks beautiful. any chance of some more picks and detail?
I second that!
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irisher
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Sat Aug 07, 2010 12:10 pm

That has got to be the best spray and pray I have ever seen. I really like how the bolt action exposes your combustion chamber for fueling/venting.
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Gun Freak
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Sat Aug 07, 2010 12:56 pm

Wow I love it! Very much like the Barrett M82!
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I have plans to make a pneumatic version... Watch out 8) :D
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Ragnarok
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Sat Aug 07, 2010 2:29 pm

You know what I think would be good? If you could replace the screw end cap.

O-ring at the back of the chamber, O-ring an inch or two forwards, cut a hole in the side of the pipe between the two as your spray port...

Have the whole thing seal into the back of the stock (you might need to put a pipe in there), and that way you wouldn't need to unscrew the back each time - simply working the bolt action would open it up for you to spray into. And when you close it up, the O-rings would seal against the inside of the space in the stock.
Does that thing kinda look like a big cat to you?
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Gun Freak
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Sat Aug 07, 2010 2:52 pm

I like that idea! Definitely would speed up the fueling and shooting process... even better, auto propane injection and venting :D
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spudrouge420
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Sun Aug 08, 2010 5:40 am

If you want to see details of the bsr's operation check out ... the idea for this came from a mix of the barret 50 and the 50 cal construction manual. here are some better pics.
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cfb_rolley
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Sun Sep 05, 2010 5:09 am

wow nice job! that is definately the best spray and pray i have ever seen too. hope you don't mind, but this gives me some serious inspiration and motivation for me to build an advanced combustion similar-ish to this
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jackssmirkingrevenge
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Sun Sep 05, 2010 5:15 am

I had missed this, very well put together. I second the suggestion for proper metering though, and surely after what you've accomplished it would be worth fitting an extractor that pops the shell out after firing...
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