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April 20th, 2011 at 9:59 am
Sooo… 5250fps (1600mps), and it can go through a 1/8″ thick piece of steel?
I’m not that impressed.
Now, if it can go 7km, STILL be doing 5000fps and punch through 2″ of armor it was AIMED at, THEN I’d be IMPRESSED!
April 20th, 2011 at 11:07 am
I am pretty impressed they did it with magnets, and not gunpowder.
April 20th, 2011 at 12:47 pm
@HL
Not to mention the very speed of it is setting the air on fire lol, not from a powder explosion like you said.
I’ve read that the big ones they plan to use in the Navy will be able to be fired like cruise missiles at distant targets, and with accuracy to boot.
April 20th, 2011 at 1:59 pm
I think some of you are missing the point. It went through the plate FIRST and then, even with ZERO degrees elevation it went 7 km. That means that the steel plate, which was not terribly thick, did not disrupt the flight characteristics. Moreover, it was able to traverse 7 km in the time it would take the projectile to fall from the end of the barrel to the ground, or about .5 to .75 seconds (judging the height to be about 8-13 feet). Not bad for a test system.
April 20th, 2011 at 3:19 pm
So 7 years to put it on a Ship? Any bets that the Chicoms can have it up and deployed within 2 years? Another Day Late and a Dollar Short Multi-Billion Dollar Boondoggle. If the Skunkworks had to work in Today’s Military Industrial Complex, we still would not have the SR-71 Blackbird.
April 20th, 2011 at 6:42 pm
Moreover, it was able to traverse 7 km in the time it would take the projectile to fall from the end of the barrel to the ground, or about .5 to .75 seconds (judging the height to be about 8-13 feet).
Not unless he misstated the muzzle velocity. I believe I heard him say “1600 meters per second.” He did, however, say “Mach 5” which is about 5,580fps.
Assuming no deceleration due to impact and then air friction, time of flight has to be:
7,000m / 1,600m/s = 4.375s
Muzzle height must then be 0.5gt**2 where g=9.8m/s**2 and t=4.375. 93.8 meters, or 300 feet.
So he’s either wrong, or the projectile generates lift, or it was deflected at an upward angle by the impact with the target, or the ground falls away downrange, or….
Don’t get me wrong, 5,500 fps is nothing to sneeze at, but it’s not “hypervelocity” in my book. (A flight time of 0.75 seconds for 7km is in excess of 30,000fps. THAT’S hypervelocity!)
April 20th, 2011 at 9:35 pm
Regardless of the specifics, if the Navy actually had things like that, I would so still be in…
April 21st, 2011 at 7:41 pm
Got some kind of weird encoding error when I tried to view it. Alternate link: http://www.popsci.com/node/53495