Re: Another school coilgun poject
V2006, Thu Jun 06 2019, 10:14AM

+ calculations in the attached file

Re: Another school coilgun poject
V2006, Thu Jun 06 2019, 11:05AM

calculations here

Re: Another school coilgun poject
Sulaiman, Thu Jun 06 2019, 03:11PM

I liked the winding wire, but;
. a quick calculation gives about 0.125% efficiecy ?
(4mm dia x 20mm steel = 2g @ 50 m/s vs 3mF @ 1200V)
. it's nice when theory and practice coincide, but the design seems impractical therefore unrealistic.
. the rate of change of inductance during acceleration is low so:
. lots of energy will need to be recovered from the coil
- the nett force acting on the projectile will be (relatively) low
- giving low overall energy transfer
based mainly on reading, with a tiny bit of experimenting.

Mounting the coil and projectile on an axial force transducer may be useful ?
(must be immune to / shielded from the huge dB/dt etc.)

I don't know what kind of 'school' you mean,
but to me, 'school' studends should not be encouraged to play with 3mF 1.2kV capacitor banks.
much higher energy than a defibrilator !

Re: Another school coilgun poject
V2006, Thu Jun 06 2019, 06:08PM

Article for comparison with other results
I have a much higher efficiency:

Ultra Powerfull COILGUN VID 20190524 151701



SUPER POWERFULL COILGUN Ultra Mega Destroyer VID 20190515 142236



Mega Great Force Coilgun TRIM 20190524 192335



*Here, the voltage is only 100 Volts (60000 microfarads) - another school coilgun poject

Simple mass accelerator

Re: Another school coilgun poject
DerAlbi, Thu Jun 06 2019, 06:35PM

Your video does not show efficiency. Math does, in this miserable world.

Re: Another school coilgun poject
V2006, Thu Jun 06 2019, 06:47PM

Sie haben überhaupt nichts - wenn Sie kritisieren - besser machen

Re: Another school coilgun poject
V2006, Fri Jun 14 2019, 10:17AM


Coil "Student" caliber 10 mm - Another school coilgun poject VID 20190607 2315471



Simple mass accelerator
Another school coilgun poject (School of Doctor Evil)

Re: Another school coilgun poject
V2006, Sun Jul 21 2019, 08:30PM

Educational film

Homemade CoilGun || Tutorial & DEMO ||

Re: Another school coilgun poject
V2006, Tue May 25 2021, 03:41PM

Coilgun "Bachelor":







34000 mkF, 325 - 350 Volt