Coilgun - 1 long 1 layer coil as long as the barrel? Good, Bad?
PlayNice, Sat Oct 05 2013, 01:16AMHas anyone tried to make a say a 8 foot long 1 layer coil? So basically just wrap the entire 8 foot barrel with thick coil wire?
So when the projectile gets close to the middle at 4ft, turn off the power to the coil.
What are the negatives and positives of such system? Would the gun keep accelerating if you made the barrel/coil even longer say 50 feet?
Re: Coilgun - 1 long 1 layer coil as long as the barrel? Good, Bad?
BigBad, Sat Oct 05 2013, 01:29AM
Active coils (sections) need to be very roughly spherical, roughly as thick as they are long for optimum performance, and the projectile should be about the same length.
Otherwise parts of the coil are a long way away from parts of the projectile and you get very reduced performance.
If they're close together, you win thrust because each part of the coil is close to all parts of the projectile, and you get thrust from each combination of part of coil/part of projectile.
(Roughly speaking it's a bit more complicated because parts of the coil can push back as well as pull depending on the geometry).
BigBad, Sat Oct 05 2013, 01:29AM
Active coils (sections) need to be very roughly spherical, roughly as thick as they are long for optimum performance, and the projectile should be about the same length.
Otherwise parts of the coil are a long way away from parts of the projectile and you get very reduced performance.
If they're close together, you win thrust because each part of the coil is close to all parts of the projectile, and you get thrust from each combination of part of coil/part of projectile.
(Roughly speaking it's a bit more complicated because parts of the coil can push back as well as pull depending on the geometry).
Re: Coilgun - 1 long 1 layer coil as long as the barrel? Good, Bad?
PlayNice, Tue Oct 08 2013, 03:42AM
yea the design seems super inefficient, I just though I ask and get someone else's thoughs on it. Thanks.
PlayNice, Tue Oct 08 2013, 03:42AM
yea the design seems super inefficient, I just though I ask and get someone else's thoughs on it. Thanks.
Re: Coilgun - 1 long 1 layer coil as long as the barrel? Good, Bad?
Signification, Sat Jan 31 2015, 11:54PM
Maybe there is something to this if the projectile is around 6 feet long...it reminds me of something I saw featured on TV years ago--probably in the late 70's or early 80's. It was a forklift fitted with some kind of (I think, magnetic) 'gun' that drove huge rods that looked exactly like giant nails with flat heads (probably some sort of ground rods) completely into the ground in one shot--I think they must have been at least 6 feet long (I am thinking significantly longer). I recall it being referred to as "the world's largest nail gun" This was many years before I ever knew anything at all about this stuff, but this particular 'gadget' stuck with me (NPI)
Signification, Sat Jan 31 2015, 11:54PM
Maybe there is something to this if the projectile is around 6 feet long...it reminds me of something I saw featured on TV years ago--probably in the late 70's or early 80's. It was a forklift fitted with some kind of (I think, magnetic) 'gun' that drove huge rods that looked exactly like giant nails with flat heads (probably some sort of ground rods) completely into the ground in one shot--I think they must have been at least 6 feet long (I am thinking significantly longer). I recall it being referred to as "the world's largest nail gun" This was many years before I ever knew anything at all about this stuff, but this particular 'gadget' stuck with me (NPI)
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