The article presents the results of measurements of the parameters of JCCON capacitors with a nominal value of 450V 220mkF. Their influence on the parameters of the projected electromagnetic accelerator in terms of its mass and the maximum achievable velocity of the projectile is discussed.

The final version of a compact voltage converter for capacitor charging is briefly described and tested.

The effect of a metal barrel on the efficiency of a coilgun is investigated by measuring the inductance of a coil fitted to a metal tube in various configurations and comparing the results with the inductance of the same coil without a conductive core. The results of measurements at various frequencies and the corresponding speeds of motion of the projectile accelerated by the coilgun are presented.

A few circuits with application of 555-timer for driving power switch in a coilgun are demonstrated

An experiment was conducted dedicated to invesigation of heating and cooling of coils of the various configurations. Its results are discussed in application to permissible power and fire rate of the reluctance launchers.

Uncomplicated device for coil winding is described

The sequential electromagnetic feeding system for coilgun is described, operating on the "travelling wave" principle. The system is tuned for standard 4.5 mm steel balls and has capacity of 17 charges.

The theory of inductive sensor using the current shape in coil to detect a projectile is presented. Experimental setup which realizes this principle is also described.

IR proximity sensor for safe loading of the coilgun is described.

This article bases on results of experiments conducted when EM-2 and EM-3 coilguns were being constructed. Their purpose was to  obtain accelerated body (projectile), optimal for portative electromagentic accelerators. Besides, I had to do some caluclations and Web data retrieval. The findings of those investigations are presented.