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Registered Member #75
Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
8MJ is not so much if you consider that an average car engine (80kW) would take only two minutes to spin up a flywheel to that kind of power. The problem would be the compensated alternator to extract all the power from the flywheel quickly, I think modding your average car alternator is not going to do the job Still, yes, I definitely would like that system in my backyard, or better yet, mounted to a pickup-truck.
<quote> 8MJ is not so much if you consider that an average car engine (80kW) would take only two minutes to spin up a flywheel to that kind of power. </quote>
Likewise, 1 liter of diesel fuel contains a little over 40mj of energy. A Flux Compression Generator ( ) operating at 40% efficiency and burning 1/2 a liter of diesel fuel would match that 8mj. And even if you had to embed the whole thing in cement to protect against shrapnel, it would probably still be smaller and lighter than the huge capacitor bank the navy railgun requires.
Registered Member #546
Joined: Fri Feb 23 2007, 11:43PM
Location: Albuquerque, NM
Posts: 239
anyone else bothered by this?
wrote ...
Because the gun uses electricity and not gunpowder to fire projectiles, it's safer, eliminating the possibility of explosions on ships and vehicles equipped with it.
I've (intentionally) blown up a microwave oven cap.... I wouldn't want a 8MJ bank blowing up near me.
Granted, a single cap failure would probably be better than a whole munitions bunker going off at once... but the way they are passing this system off as "harmless" to the operators is a bit misleading, no?
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
GreySoul wrote ...
anyone else bothered by this?
wrote ...
Because the gun uses electricity and not gunpowder to fire projectiles, it's safer, eliminating the possibility of explosions on ships and vehicles equipped with it.
I've (intentionally) blown up a microwave oven cap.... I wouldn't want a 8MJ bank blowing up near me.
MO Caps are sealed and explode very easy. You can make casings which will not exploded violantly. They will just crack open (if at all) and release all the pressure.
Have you ever witnessed ammunition (I mean artillery shells) going off? A cap explosion is just a faint joke compared to that.
Registered Member #158
Joined: Sun Feb 12 2006, 09:53PM
Location: Central Ohio
Posts: 282
A fellow I knew blew a 25kJ Maxwell while doing quarter-shrinking. Other than a huge inside-out dent, no hazard. I am sure they could blow up more violently, but your big caps are usually built in some heavy steel housings. Ofcourse as mentioned, multi-MJ usually uses compulsators like above.
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Naval Research rail gun
