• FlatWisdom is very suitable for all types of websites; from corporate site to blog site, and it works perfectly in every browser; tested in IE6/7/8, Opera, Safari, Chrome and Firefox.

Lately, the site has been some inclinating to a "pure theory" side. To correct this situation, new large Research of heat transfer dynamics in the winings of electromagnetic launchers is added to Experimental section. 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.

... Read more »

Views: 6 | Added by: Eugen | Date: 01.11.2019 | Comments (0)

New article called "Assessment of maximum speed reached in accumulator-driven coilgun" added, complementing a set of papers dedicated to theoretical exploration of the limits inherent to different coilgun constructions. An equation for output projectile velocity in an accumulator-driven reluctance launcher is derived. Influence of an internal accu resistance is investigated. Comparison with experimental results is given.

Views: 25 | Added by: Eugen | Date: 30.07.2019 | Comments (0)

Assessment of power (current) dependence on output velocity of a projectile added to Simple equations for coilgun page.

Views: 21 | Added by: Eugen | Date: 24.06.2019 | Comments (0)

New article called   "Assessment of maximum speed reached in a SCR-commutated portable reluctance launcher "   added to Theoretical section. Limitations for the speed achievable in a reluctance coilgun commutated by thyristors are investigated based on geometrical properties of the accelerating coils. Thermal, and  also capacitor weight and ESR issues are taken into account.

... Read more »

Views: 41 | Added by: Eugen | Date: 08.05.2019 | Comments (0)

EM-4 project reanimated. A simple gravitational feeding system is built and tested. More details are on the project's page.

Views: 64 | Added by: Eugen | Date: 08.03.2019 | Comments (0)

New "Efficiency of resistor-assisted chaging of capacitor from a constant voltage source" page added to Theoretical sectionA process of capacitor charging through a resistor from a constant voltage source is investigated. A strong dependence on relation of initial voltage on the cap to the source voltage is demonstrated.

 

... Read more »

Views: 58 | Added by: Eugen | Date: 28.01.2019 | Comments (0)

Merry Christmas and Happy New Year!

Views: 58 | Added by: Eugen | Date: 29.12.2018 | Comments (0)

New Assessment of maximum speed achievable in a multistage coilgun with identical coils page added to Theorectical section. Limitations for velocity of projectile are investigated for a multistage reluctance accelerator having identical coils. Geometrical parameters of winding are used as basis, assuming an overdamped system fed from large common capacitance.

Views: 55 | Added by: Eugen | Date: 23.12.2018 | Comments (0)

New "Assessment of damping resistor" section added to simple equations for coilgun page.

Views: 46 | Added by: Eugen | Date: 16.12.2018 | Comments (0)

New theoretical paper Efficiency assessment for a half-bridge coilgun in real operating conditions added with conjugated FEMM calculation page.  In continuation of the previous study, the efficiency of a halfbridge -based coilgun accelerator with high initial velocity of a projectile is explored . For comparison, the p ... Read more »

Views: 90 | Added by: Eugen | Date: 05.07.2018 | Comments (0)

1 2 3 4 »