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 Posted: Wed Jan 05, 2011 7:36 pm
KK, if we're going by kilowatt hours, which is electrical density (and spread out over time), the thing can produce roughly 200 kilowatt hours for a medium grade battery. Multiply that by 3600 for watt hours, and then 1000 for the kilo, and then you get that it's basically 720,000,000 joules per hour.
Multiply that by an average of 2.5% efficiency (for coil guns in general), and we get around 18 million, and then multiply that for an inherent average of 85% electrical efficiency, and we get around 15.3 million.
Divide that by 650, and, we get roughly a 23,846 round life for a 1 kilogram battery.
Lower everything to the bottom of the spectrum, and it's still 10,000+ rounds for one battery.
So, basically, a one pound battery, using medium grade materials, gets around 10,000 rounds.
Pretty interesting.
So, it's not out of the picture.
Batteries are still required, but it's relatively efficient.
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Posted: Fri Jan 07, 2011 3:55 pm
Okay, I've got an idea. A firing system like the Vickers one in the M3 Machine gun.
Except, the weapon uses a roller delayed telescopic bolt, and the gas provided for the extra power is provided by a gas piston, instead of the moving action of the barrel.
So, you essentially keep the barrel stationary and use a piston instead of raw gas.
It should be extremely reliable, given the already inherent reliability of the roller delayed blowback weapon, and with the extra gas it'll hopefully make it even more reliable.
Seeing as how it'll be a gas assisted telescopic bolt (telescopic bolts usually get around 1200 RPM, and Gas assist well over 1400) I'd imagine that it would have a very high RPM. Maybe 1800 plus.
Which is why it needs to be roller delayed. It'll probably, hopefully bump it down to around at least 1200. Maybe even 900. Still a pretty high rate of fire though.
I suppose if the roller delay is larger, though, it would be possible to dump it down to a more reasonable RPM.
Of course, recoil might be increased down to the blowback mechanism.
I suppose I'd mostly compensate for this with a muzzle break, hydraulic buffer, and soft recoil pad.
Yeah, seems like it would be pretty reliable.
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Prussian Imperial Guard Crew
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Posted: Thu Mar 24, 2011 10:04 pm
Watching you argue with yourself is simmultaneously amusing and creepy.
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Posted: Sun Mar 27, 2011 10:45 am
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Prussian Imperial Guard Crew
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Posted: Sun Mar 27, 2011 11:39 am
For the RPM problem I again urge you to look back to WWII. The MG-42 had a fire rate of 1800 RPM and the FG-42 was reported to have an even higher rate of fire.
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Posted: Sun Mar 27, 2011 12:07 pm
Mhhm.
Well, I was thinking about using a roller delayed mechanism, so that it would slow down the firing rate.
It's basically the same thing except the barrel stays stationary and instead, another mechanism operates the device and, this would both slow down the firing rate and and make the weapon more accurate.
Usually, when the barrel moves around (like in pistol, blow back operated mechanisms, or various types of sub-machine guns) it decreases accuracy, and makes the user experience large jolts of energy, which causes muzzle rise.
The roller delayed mechanism (presumably made by the same group of people, or at least Germans) sought to take away the normal problems associated with a blowback weapon, and, if the same concept was applied to the Vickers blowback mechanism, it would both decrease the firing rate and increase the accuracy.
Yet, the weapon would be EXTREMELY reliable, using both recoil and gas to operate the system (rather than a "gas"or "recoil" operated system).
Which would be pretty cool.
The vickers system would have to be changed quite a bit, but it would definitely be doable.
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