Author Options:

Is there a way to reduce a magnetic fields power in a certain direction, while on a tight budget? Answered

I'm going to make a coilgun with roughly 9 flash camera capacitors of varying values. Due to how I have limited resources, I intend to make this coilgun as efficient as possible. I want to know if there is a relatively cheap way to prevent the magnetic field from the coil from reaching to far in one direction, or severely weaken it's power in said direction.

I don't know if I saw this somewhere or thought of it, but if the coil has less drag on the projectile once it passes it, it should put into effect a fair boost on the efficiency. Another idea, no idea if it was originally mine or not, is to slot the barrel of the coilgun reducing to force needed to push the air out, and overall reducing friction & drag. Would this have a noticeable effect, do you think?


The forums are retiring in 2021 and are now closed for new topics and comments.

9 years ago

Make separate coils timed to power off as your projectile approaches the center of the individual coils.
That way you only pull on the projectile .
I would place an opto-detector before each coil center,
then a fire switch start and as the projectile reaches the center of coil #1
that coil is turned off and the next coil #2 gets turned on and as the
projectile reaches the center of coil #2 detector coil #2 is turned off and
coil #3 goes on etc etc...