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Post by silverdragon on Dec 3, 2012 7:19:36 GMT
This WAS tested on the show, I know, so this is a re-do request....
{Edit, using MODERN technology, could it be invented "Today"...}
Can you make a working Engine out of gunpowder...
I am going to say yes, on the grounds of the old 7.62 SLR rifle I was handed after proficiency in .303 Enfield.
The simple 7.62 mechanism SLR, Self Loading Rifle, was testament that you can re-load a barrel "Automatically"....
Use Blanks, of course...
And a LOT of modification...
So, on that idea, can we take this one stage further and use the Gun barrel of an SLR to replace or power the barrel of an Engine, run a piton {Edit.. Piton?.. ok, who let THAT one 'climb' out of the spellchuckler bin?... PISTON...} in it, attach to a crankshaft, and make a simple engine....
LOTS of modification to enlarge the existing barrel of the gun to one large enough to run a piston in?....
Ok, so, this is going to be expensive on ammunition rounds.
But is it a proof of concept?...
....so if I have a working idea, can we now go through what ELSE we may need to make this a working engine....
Can we expand on the SLR idea to make some kind of cartridge-less fuel supply?....
I know there are more exacting minds on this board that can do the finer detail stuff, so come on, this is a challenge....
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Post by the light works on Dec 3, 2012 15:17:14 GMT
This WAS tested on the show, I know, so this is a re-do request.... Can you make a working Engine out of gunpowder... I am going to say yes, on the grounds of the old 7.62 SLR rifle I was handed after proficiency in .303 Enfield. The simple 7.62 mechanism SLR, Self Loading Rifle, was testament that you can re-load a barrel "Automatically".... Use Blanks, of course... And a LOT of modification... So, on that idea, can we take this one stage further and use the Gun barrel of an SLR to replace or power the barrel of an Engine, run a piton { Edit.. Piton?.. ok, who let THAT one 'climb' out of the spellchuckler bin?... PISTON...} in it, attach to a crankshaft, and make a simple engine.... LOTS of modification to enlarge the existing barrel of the gun to one large enough to run a piston in?.... Ok, so, this is going to be expensive on ammunition rounds. But is it a proof of concept?... ....so if I have a working idea, can we now go through what ELSE we may need to make this a working engine.... Can we expand on the SLR idea to make some kind of cartridge-less fuel supply?.... I know there are more exacting minds on this board that can do the finer detail stuff, so come on, this is a challenge.... you mean more like a belt fed machine gun? ;D |
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Post by silverdragon on Dec 4, 2012 8:35:30 GMT
I suppose yes.....
However its fired, if they can do something like that Mini-Gun that has a 200 rpm fire rate, why not an internal combustion engine?....
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Post by srmarti on Dec 4, 2012 22:09:34 GMT
With sufficient fly-wheel momentum and gearing, I think I could come up with a turbine design that could work.
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Post by the light works on Dec 5, 2012 2:39:47 GMT
the minigun is electrically driven...
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ronbo6
Demi-Minion
Survivor: End of the World. 12/21/2012
Posts: 91
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Post by ronbo6 on Dec 5, 2012 5:57:27 GMT
All you would actually need to do is to attach a ratchet mechanism on the operating rod of a full-auto rifle, and use IT to turn a shaft.
A very minor further refinement would make it work with blanks instead of bulleted rounds.
It would be quite an inefficient opeation, though, as you would need a huge quantity of loaded 'carrtridges' (and one HUGE magazine) to run the 'engine' for even a short time.
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Post by silverdragon on Dec 5, 2012 7:51:04 GMT
TLW, Yes it is.
The motor on a conventional IC engine uses a bit of sparks as well?....
I am looking at a petrol replacement, and if it takes an electric motor to feed each cylinder with Powder, why not?...
The way I think on that is I am only after using Powder as the power.
If that power gets theoretically as far as turning the crank, then we have RPM;s, and therefore the ability to chuck an alternator on there, thus we can run a battery that can be used to power the motor.............
Does that help anyone;s ideas?...
I am thinking MODERN solution to an old idea that didnt get to far, perhaps because of lack of technology at the time?...
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Post by c64 on Dec 5, 2012 16:34:15 GMT
TLW, Yes it is. The motor on a conventional IC engine uses a bit of sparks as well?.... I am looking at a petrol replacement, and if it takes an electric motor to feed each cylinder with Powder, why not?... The way I think on that is I am only after using Powder as the power. If that power gets theoretically as far as turning the crank, then we have RPM;s, and therefore the ability to chuck an alternator on there, thus we can run a battery that can be used to power the motor............. Does that help anyone;s ideas?... I am thinking MODERN solution to an old idea that didnt get to far, perhaps because of lack of technology at the time?... Why not C4 or the stuff they used for ICBMs and Russian torpedoes? It's also much more expensive and dangerous, so this makes it even better than gun powder. Or just use whale oil as they used over a hundred years ago! Gun powder carries 2700 J/kg while Gasoline carries 43 MJ/kg. You need more than 10 times more gun powder than gasoine to accomplish the same. Is 50 pounds of gunpowder really cheaper than a gallon of gas? |
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Post by the light works on Dec 6, 2012 2:38:53 GMT
TLW, Yes it is. The motor on a conventional IC engine uses a bit of sparks as well?.... I am looking at a petrol replacement, and if it takes an electric motor to feed each cylinder with Powder, why not?... The way I think on that is I am only after using Powder as the power. If that power gets theoretically as far as turning the crank, then we have RPM;s, and therefore the ability to chuck an alternator on there, thus we can run a battery that can be used to power the motor............. Does that help anyone;s ideas?... I am thinking MODERN solution to an old idea that didnt get to far, perhaps because of lack of technology at the time?... like I said. with a minigun, the ELECTRIC motor turns the crank. all the gunpowder does is produce the "exhaust" |
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Post by User Unavailable on Dec 6, 2012 21:52:07 GMT
Problems I see are- Would have to be a very small engine for the actual "tiny" "(relative to the power produced) amount of propellant gasses to be able to have the energy to push the piston and turn the crank. (.308 caliber is not going to produce a "lot" of gasses) Powder would have to be a fast and near complete burning powder as anything less would quickly build up inside the cylinder. To increase RPMs of the engine, one would have to increase the RPMs (rounds per minute) fired through the weapon. Higher RPM through the weapon equals higher and fast heat build up in the weapon. So the weapon would be limited to its Sustained Rate of Fire. This is the rate at which the weapon could reasonably be fired indefinitely without failing or overheating. This is typically in the 12-15 rounds per minute range of operation. You could probably run a small, stationary, Hit and Miss Engine, but I don't think you could do it cheaper with gunpowder than you can gasoline. en.wikipedia.org/wiki/Hit-and-miss_engine I've seen Hit and Miss Engines at tractor shows run for an hour on a teaspoon of gasoline. Course it was only hitting every now and then and was not under load. |
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