Induction Launcher
EDY19, Fri Sept 15 2006, 12:10AMI've got a 2200if 450V capacitor that I'm going to use for a small induction launcher, hewever I am wondering what the main differences/advantages are of using a plastic central pipe as opposed to a thompson style with the metal rods in the center. Would one be likely to have better results in a small design like this?
Re: Induction Launcher
WaveRider, Fri Sept 15 2006, 07:44AM
Hi,
Give me the proposed dimensions of your coilgun and I'll run both through my simulator..
Be sure to indicate whether or not the iron core in the center is solid or bundled (so I know how to handle eddy currents in the core).
Off the top of my head, the iron core will generate more force in the tubular projectile for a given coil current than no core at all (for the 100-1000us pulse times encountered in many hobby coilguns)..
WaveRider, Fri Sept 15 2006, 07:44AM
Hi,
Give me the proposed dimensions of your coilgun and I'll run both through my simulator..
Be sure to indicate whether or not the iron core in the center is solid or bundled (so I know how to handle eddy currents in the core).
Off the top of my head, the iron core will generate more force in the tubular projectile for a given coil current than no core at all (for the 100-1000us pulse times encountered in many hobby coilguns)..
Re: Induction Launcher
FastMHz, Fri Sept 15 2006, 06:12PM
Do you intend to build an induction launcher or coilgun? They are very different animals (see links below)...many induction launchers do have central posts, even my first ones did...but I don't use one any more, the aluminum slug fires perfectly straight without it.
Induction launcher
Coilgun / gaussgun
FastMHz, Fri Sept 15 2006, 06:12PM
Do you intend to build an induction launcher or coilgun? They are very different animals (see links below)...many induction launchers do have central posts, even my first ones did...but I don't use one any more, the aluminum slug fires perfectly straight without it.
Induction launcher
Coilgun / gaussgun
Re: Induction Launcher
EDY19, Fri Sept 15 2006, 06:35PM
I'm building an induction launcher. I already have a decent sized coilgun. I'm going to use something in the center of the projectile to make it go strait, however I'm wondering if there would be any advantage to launching hard disk plates using a bundled iron core in the center.
EDY19, Fri Sept 15 2006, 06:35PM
I'm building an induction launcher. I already have a decent sized coilgun. I'm going to use something in the center of the projectile to make it go strait, however I'm wondering if there would be any advantage to launching hard disk plates using a bundled iron core in the center.
Re: Induction Launcher
FastMHz, Fri Sept 15 2006, 07:17PM
Iron placed on an induction launcher coil will suck to the coil....
FastMHz, Fri Sept 15 2006, 07:17PM
Iron placed on an induction launcher coil will suck to the coil....
Re: Induction Launcher
EDY19, Fri Sept 15 2006, 07:23PM
An Iron Guide in the center in order to guide the plate/ring (I believe this is what thompson launchers use? And it has some effect on something/./
EDY19, Fri Sept 15 2006, 07:23PM
An Iron Guide in the center in order to guide the plate/ring (I believe this is what thompson launchers use? And it has some effect on something/./
Re: Induction Launcher
FastMHz, Fri Sept 15 2006, 07:39PM
Ahh so you're thinking about putting a central iron post...all I can say is try it and report back
I stopped using central posts as I found them unnecessary - the projectiles go perfectly straight anyway...actually, mine aren't even rings any more - they're solid aluminum slugs.
FastMHz, Fri Sept 15 2006, 07:39PM
Ahh so you're thinking about putting a central iron post...all I can say is try it and report back
I stopped using central posts as I found them unnecessary - the projectiles go perfectly straight anyway...actually, mine aren't even rings any more - they're solid aluminum slugs.Re: Induction Launcher
Quantum Singularity, Tue Sept 19 2006, 12:55AM
I havent tried the ferromagnetic core "Thompson" stlye launcher... I was under the impression that this style would help effeciency at low power levels but possibly hurt effeciency at higher power levels. Cant remember were I read that, does that sound correct? Or is it that it helps effeciency while using a smaller 'ring' since it sorta condenses the magnetic field through the smaller ring while a larger disk projectile doesnt need the magnetic field to be shaped any different so long as the coil is matched with the projectile? I might try using a ferromagnetic core if it will help effeciency but I just dont see it being better than a flat sprial / disk projectile.
Quantum Singularity, Tue Sept 19 2006, 12:55AM
I havent tried the ferromagnetic core "Thompson" stlye launcher... I was under the impression that this style would help effeciency at low power levels but possibly hurt effeciency at higher power levels. Cant remember were I read that, does that sound correct? Or is it that it helps effeciency while using a smaller 'ring' since it sorta condenses the magnetic field through the smaller ring while a larger disk projectile doesnt need the magnetic field to be shaped any different so long as the coil is matched with the projectile? I might try using a ferromagnetic core if it will help effeciency but I just dont see it being better than a flat sprial / disk projectile.
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