Oxy/MAPP hybrid
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SpudBlaster15
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:36 pm, edited 3 times in total.
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Pete Zaria
- Corporal 5
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Interesting design that you're using, the same meter system for both gases. I assume you'll need significantly more oxygen than fuel to achieve stoichiometric mixes.
What pressure, and how many "shots", of MAPP and O2 do you use for a 2x mix?
I love combustion and hybrid guns that have everything required to operate on-board. It's one of my design criteria for every gun I build, though that isn't a lot of them lately.... lol.
Excellent work, man. You continue to innovate and push the limits. Thank you for your contribution to SpudFiles
Peace,
Pete Zaria.
What pressure, and how many "shots", of MAPP and O2 do you use for a 2x mix?
I love combustion and hybrid guns that have everything required to operate on-board. It's one of my design criteria for every gun I build, though that isn't a lot of them lately.... lol.
Excellent work, man. You continue to innovate and push the limits. Thank you for your contribution to SpudFiles
Peace,
Pete Zaria.
Looking good. There are very few hybrids set up to use pure Oxygen mixtures, and this may be the first made out of commonly available parts.
The only slight problem I can see is that your gauge isn't rated for oxygen service, but that shouldn't be a problem at such low pressure. You won't be able to get an output of more than 14 psi out of that oxygen regulator (I've tried it). It is relatively simple to modify that regulator to be capable of output pressures of around 70 psi, but you shouldn't need to do so for this design.
The only slight problem I can see is that your gauge isn't rated for oxygen service, but that shouldn't be a problem at such low pressure. You won't be able to get an output of more than 14 psi out of that oxygen regulator (I've tried it). It is relatively simple to modify that regulator to be capable of output pressures of around 70 psi, but you shouldn't need to do so for this design.
i think you may be sligtly insane, but thats ok, i keeps you alert....
so i have a question. does the oxygen tank has left hand threads? i bought a tank, but the problem is i didnt notice the threads, so it is compleatly usless to me...
anyway, you do have a nice design. it looks powerful.
so i have a question. does the oxygen tank has left hand threads? i bought a tank, but the problem is i didnt notice the threads, so it is compleatly usless to me...
anyway, you do have a nice design. it looks powerful.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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iPaintball
- Corporal 2
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I can't imagine the kind of power you'll get from this thing. Nice work!
Yes, disposeable oxy tanks are reverse threaded, although I'm not sure why...
Yes, disposeable oxy tanks are reverse threaded, although I'm not sure why...
Summer Projects:
CO2 tank hybrid: Gotta fix the meter
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
CO2 tank hybrid: Gotta fix the meter
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
its probably so that teenagers such as myself dont put it into a peice of pipe...iPaintball wrote: Yes, disposeable oxy tanks are reverse threaded, although I'm not sure why...
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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dauphinoise potato
- Specialist
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Hmm t'is rather nice looking and a good idea. I sense serious power 
It's all a bunch of tree huggin' hippie crap!
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mark.f
- Sergeant Major 4
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The reason is right above your post, in some beautiful 800X600 JPG images.Yes, disposeable oxy tanks are reverse threaded, although I'm not sure why...
It's to make it harder for retards like us to put it into a piece of galvanized pipe with some MAPP gas and set it off.
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SpudBlaster15
- First Sergeant 3
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:36 pm, edited 1 time in total.
I achieved a very crude modification of an identical regulator by sawing off the top of it, via a cut across the body of it about 1mm below the black knob. If you cut too low, the reg. will be damaged and useless.
If you cut it in the right spot, and have the patience to cut through more than 3/4" of solid brass, you will see a black ring in the center of the tube, which is made of some sort of rubber.
Pressing down on this rubber membrane will release pressure, and the harder you press, the higher the output pressure. Now all you have to do is invent a way for it to achieve a constant, controllable output (which I never did because the entire design was scrapped after it exploded).
I would assume that your other setup involves starting with normal air, adding a set amount of MAPP gas, and then adding the right amount of pure oxygen to account for the extra fuel. This was my original setup, but I measured by chamber pressure rather than using a conventional meter, so it wasn't very accurate. With this setup, there will still be some buffer gas present, so efficiency won't be quite as high, but you will conserve oxygen, which gets expensive very quickly otherwise.
If you cut it in the right spot, and have the patience to cut through more than 3/4" of solid brass, you will see a black ring in the center of the tube, which is made of some sort of rubber.
Pressing down on this rubber membrane will release pressure, and the harder you press, the higher the output pressure. Now all you have to do is invent a way for it to achieve a constant, controllable output (which I never did because the entire design was scrapped after it exploded).
I would assume that your other setup involves starting with normal air, adding a set amount of MAPP gas, and then adding the right amount of pure oxygen to account for the extra fuel. This was my original setup, but I measured by chamber pressure rather than using a conventional meter, so it wasn't very accurate. With this setup, there will still be some buffer gas present, so efficiency won't be quite as high, but you will conserve oxygen, which gets expensive very quickly otherwise.
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SpudBlaster15
- First Sergeant 3
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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:36 pm, edited 2 times in total.
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SpudBlaster15
- First Sergeant 3
- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 5:35 pm, edited 1 time in total.