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Post by oprean on Mar 6, 2017 17:29:14 GMT
ok, the new update is up, and qswitched finally fixed the coil guns, yay, but now I can exactly point out what I didn't get the first time I tinkered with coil guns in the past versions, namely: how does staging work, and why does adding more stages doesn't double (or nearly) the projectile energy, I get that a doubling in projectile energy wouldn't double the speed, but all adding new stages does is accelerate the projectile slower so it won't fragment from the acceleration, so my question is: if adding a second stage, costs a new barrel segment, a new capacitor and twice the total energy put in, why does it halve the maximum acceleration during the said stage? edit: I forgot to show the gun't projectile speed, but in both cases it was the same.
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Post by Hicks on Mar 6, 2017 17:43:50 GMT
Physics? I can normally get decent additive acceleration (at or above stock velocities) out of ~4 stages, but the main difference is between my designs and this is that I never-ever use more than one layer in the coil if possible, and my armatures are kilogram mass blocks of raw iron.
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Post by Durandal on Mar 6, 2017 17:48:57 GMT
I'm at work and I've slept since then, but I built a coilgun for my capstone project in college. Basically, you can only squeeze so much effeciency out of additional coils, and to a point they can induce something like a "magnetic drag" or a suckback effect if everything isn't arranged correctly.
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Post by Easy on Mar 6, 2017 19:49:18 GMT
The problem is that your projectile is longer than the coil.
Switch to your 2 coil setup and vary the projectile mass and bore size (changing the projectile's aspect ratio).
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Post by oprean on Mar 6, 2017 21:12:51 GMT
The problem is that your projectile is longer than the coil. Switch to your 2 coil setup and vary the projectile mass and bore size (changing the projectile's aspect ratio). Well, that solves one part, now the increase in projectile energy is nearly the same from one to the next, except for a diminishing returns effect, I thought the projectile is calculated as point like so this never occurred to me.
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Post by Hicks on Mar 6, 2017 23:02:56 GMT
Truth in advertising. Thanks qswitched!
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Post by Durandal on Mar 7, 2017 22:16:17 GMT
Random thought: has anyone tried building guns designed to fire equivalent mass and bore projectiles based around coins? I'm wondering how effective a projectile with the mass and composition of a US quarter at something like 8-12 km/s will be.
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