pre-accelerator
JoeDarkon, Thu May 24 2007, 04:29PMi was wondering if it would make a noticeable difference if i accelerated the projectile (pneumaticly or with a spring) before it went through two coils as opposed to us the first coil to start it off
Re: pre-accelerator
Bjørn, Thu May 24 2007, 05:59PM
The energy that you transfer to the projectile in any pre-stage will not go disappear so the final velocity will be higher. If it makes sense depends entirely on why are making a coil gun.
A gun based on compressed gas will be far cheaper and more powerful than a coil gun so it would be a strange combination. If it is for fun, learning or to achieve a very accurate velocity then it might make sense.
Bjørn, Thu May 24 2007, 05:59PM
The energy that you transfer to the projectile in any pre-stage will not go disappear so the final velocity will be higher. If it makes sense depends entirely on why are making a coil gun.
A gun based on compressed gas will be far cheaper and more powerful than a coil gun so it would be a strange combination. If it is for fun, learning or to achieve a very accurate velocity then it might make sense.
Re: pre-accelerator
Simon, Fri May 25 2007, 05:52AM
IIRC, someone in Japan tried this. Along with Bjørn, I'm not sure why there'd be a practical reason to combine compressed gas with EM.
Since (I'm assuming) the bulk of your energy will be in the capacitors, anyway, there won't be any major efficiency advantage over a multistage design.
Simon, Fri May 25 2007, 05:52AM
IIRC, someone in Japan tried this. Along with Bjørn, I'm not sure why there'd be a practical reason to combine compressed gas with EM.
Since (I'm assuming) the bulk of your energy will be in the capacitors, anyway, there won't be any major efficiency advantage over a multistage design.
Re: pre-accelerator
TheMerovingian, Fri May 25 2007, 11:06PM
The best preaccelerator is a coilgun itself or a solenoid + spring combination. I'm using this configuration for my semiautomatic magnetic submachine pistol where a solenoid is used to kick the projectiles out of the magazine into the coil barrel for further acceleration
TheMerovingian, Fri May 25 2007, 11:06PM
The best preaccelerator is a coilgun itself or a solenoid + spring combination. I'm using this configuration for my semiautomatic magnetic submachine pistol where a solenoid is used to kick the projectiles out of the magazine into the coil barrel for further acceleration
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