|
Post by elouda on Oct 2, 2016 0:02:59 GMT
Interestingly I ended up with a very similar coilgun to yours Joker, its a 1.9MW 150mm firing a 1kg slug at 9kms. It absolutely obliterates all of the stock designs armour.
I've been trying to design a whipple shield to handle it, so far the most effective seems to be 5mm AlZnMg, 40cm space, 5mm of Aramid fibre, 20cm space, 5mm of AlZnMg, 20cm space, main armour (in my case, 5cm CarbonCarbon with a 2cm Aramid fibre backing.
Still seems to get through when it hits close to side on.
|
|
joker
New Member
Posts: 8
|
Post by joker on Oct 2, 2016 0:25:13 GMT
Hm. In my experience nukes tend to heat up just about everything, which makes thermal conductivity less relevant. On the other hand, I usually deliver nukes at a rate of about 8 a second. Joker, the solution to high-velocity projectiles is always Whipple shields (with good enough armor behind them). As I understand it, for best effect the shield needs to be strong enough to cause complete disintegration of the projectile, but beyond that point additional mass is bad (because it impacts the armor too), until it starts to meaningfully resist penetration. Once you cause disintegration, a greater standoff distance spreads the force over a greater portion of the inner armor. It seems to follow that you want some sort of balance between shield and main armor; you want anything large enough to pass through the shield mostly intact to also pass through the main armor, but also anything that is broken up by the Whipple shield to be stopped by the main armor. Of curiosity, how repeatable is that effect against other armors? My offhand guess is that either you have found the magic projectile for that armor that penetrates the Whipple shield mostly intact, and then completely penetrates the inner armor (while disintegrating), or you are causing mass spalling off the back of the armor (a lot of the ceramics have poor tensile strength, which makes them quite vulnerable to spalling. But that situation is heavily armor-dependent; a stronger shield would break it up enough for the armor to handle, and weaker armor would lead to intact penetration. That's it. I use a stronger Whipple shield and stronger main armor, now the damage seems more reasonable.
|
|
|
Post by blothorn on Oct 2, 2016 0:26:08 GMT
Of curiosity, why carbon-carbon? Despite its low density, it has poor shear and tensile strength (and is not all that cheap).
|
|
|
Post by elouda on Oct 2, 2016 3:40:54 GMT
Of curiosity, why carbon-carbon? Despite its low density, it has poor shear and tensile strength (and is not all that cheap). In this case its because nothing else in the array is effective against lasers. The alternative might be something like 3-5cm of Graphite with a stronger backing, but so far this has worked out ok. C-C also seems adequate against nukes, though I try not to get hit with those.
|
|
tuna
New Member
Posts: 33
|
Post by tuna on Oct 2, 2016 7:10:09 GMT
Reinforced carbon-carbon is also terrible against lasers, see first post on this thread. A much better relatively cheap material would be graphite or boron.
|
|