New short video of testing of infrared sensors was added to EM-4 coilgun page. Small nail is falling down through the sequence of accelerating stages activating the SCRs (yellow LEDs are illustrating that process).

PCBs for accelerating part of EM-4 coilgun have been mounted.

Merry Christmas and Happy New Year!

PCBs for the accelerating part of EM-4 arrived. Ready to mount.  

An animation illustrating principle of operation of the bistage accelerator is added to EM-4 coilgun page.

The scheme of accelerating part and power modules of EM-4 is finished. Corresponding section is added to EM-4 page.

New Investigation of stability of multistage coilgun accelerator with and without feedback to variation of the initial parameters is added to Theoretical section.

New page describing Influence of the magnetic core on efficiency of the gauss gun is added to FEMM calulations section.

Modelling for EM-4 coilgun is finished. Generalized results are here.

It looks not bad yet. I may hope to get more than 70 m/s (230 fps) on the output of the accelerator.

Waiting for the experimental results.

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New FEMM calculations section is started. It will be filled with results of modelling for different configurations of coilguns and according scripts.