Posted on 05/27/2016 10:28:47 AM PDT by sukhoi-30mki
yes that’s almost fast enough to out run a ford truck.
Requires a hit, though. A standard naval gun proximity fused can do significant damage on a near-miss.
I saw that too. Knuckleheads.
“In conventional guns, a bullet loses velocity from the moment the gunpowder ignites and sends it flying. “
If that were the case, explosive guns wouldn’t use long barrels - like rifles.
“25 megawatt of power is enough to light a city.”
You guys are confusing watts with joules. Watts is a measure of power, energy per second. It may require a 25megawatt generator that only operates a second or two.
A 10kg projectile requires 35,000,000 joules to get it to 45000 mph (double that for inefficiencies = 70,000,000 J). Sounds like a lot, but if you are charging a capacitor bank, that’s only 2.5 seconds if you have a 25 megawatt generator (that’s a 33,000 horsepower plus engine)..
read
Right. Since the bullet is still at the moment of ignition, it has to gain a whole lot of velocity before it starts losing velocity.
It ain’t the Watts, it is the Joules - how long does it take to charge the gun at 25 MW?
:D
Thank you for that.
A 25 megawatt power plant and large capacitor bank are required to provide enough pulse power to fire the weapon 10 times a minute.
So that is 150 MegaJoules - 35.85 kg of TNT.
Hillarious picture at article, showing ultra high-tech, 25 megawatt powered gun being loaded by hand.
1000 watts is about 1 horsepower.
One Megawatt used to be enough power for 7,000 houses.
I did not notice the voltage or amperage of the discharge but the instantaneous power must be amazing.
Put a guidance system on the round for anti-aircraft or anti-missile work. No more aircraft within 10-20 miles of the ship.
No more aircraft within 10-20 miles of the ship.
I wonder if an internal guidance system could take the acceleration of the firing?
Actually, 45 Mw for a microsecond is only 45 Joules. Your car could provide that in less than a second - typical car alternator is somewhere in the 1 Kw area, so it would only take .045 seconds to generate that 45 Joules of energy.
But I’m guessing the pulse necessary for a rail gun is probably at least in the 10s of milliseconds area. Let’s say 50 ms. so 45 e06 * 50 e-03 is 2.25 MJ. That would take your car’s alternator a couple thousand seconds to produce.
Yes.
Assuming you could armor-up a tank to defend against this, the weight, and the energy needed to move that weight are impractical to impossible. And the armament? The current Abrams main gun MV of a 120mm sabot round is +/- 5,200 fps (if memory serves). Doesn’t come close to generating the same kinetic force.
Yes, this is a potential game changer. But...how to provide the power to fire this beasty is the $64,000 question.
regards,
Where I used to work, we called them BFCs. Still, you need something to charge them up.
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