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 26.07.2017 A simple method of assessment of moment of maximum current for overdamped circuits is added to Simple equations for coilgun section. .u-star-rating-16 { list-style:none;margin:0px;padding:0px;width:80px;height:16px;position:relative;background: url('/.s/t/1321/rating.png') top left repeat-x } .u-star-rating-16 li{ padding:0px;margin:0px;float:left } .u-star-rating-16 li a { display:block;width:16px;height: 16px;line-height:16px;text-decoration:none;text-indent:-9000px;z-index:20;position:absolute;padding: 0px;overflow:hidden } .u-star-rating-16 li a:hover { background: url('/.s/t/1321/rating.png') left center;z-index:2;left:0px;border:none } .u-star-rating-16 a.u-one-star { left:0px } .u-star-rating-16 a.u-one-star:hover { width:16px } .u-star-rating-16 a.u-two-stars { left:16px } .u-star-rating-16 a.u-two-stars:hover { width:32px } .u-star-rating-16 a.u-three-stars { left:32px } .u-star-rating-16 a.u-three-stars:hover { width:48px } .u-star-rating-16 a.u-four-stars { left:48px } .u-star-rating-16 a.u-four-stars:hover { width:64px } .u-star-rating-16 a.u-five-stars { left:64px } .u-star-rating-16 a.u-five-stars:hover { width:80px } .u-star-rating-16 li.u-current-rating { top:0 !important; left:0 !important;margin:0 !important;padding:0 !important;outline:none;background: url('/.s/t/1321/rating.png') left bottom;position: absolute;height:16px !important;line-height:16px !important;display:block;text-indent:-9000px;z-index:1 } Views: 1 | Added by: Eugen | Date: 26.07.2017 | Comments (0)

 24.06.2017 New Simple equations for coilgun section was added. It will collect relations which allow fast assessment of desired parameters of coilgun.  Views: 6 | Added by: Eugen | Date: 24.06.2017 | Comments (0)

A box for vertical gravitational feed of EM-4 coilgun has been assembled.

The projectile's heads are milled, too. Their diameter is 5,5 mm, the rear parts are thinner and have 0,15 mm cuts to glue tubular stabilizers later.

Views: 11 | Added by: Eugen | Date: 28.05.2017 | Comments (0)

 17.04.2017 A sketch of EM-4 coilgun is performed with main dimensions. Laser-cut plywood is planned to be used as material of the case. A wooden detail of rather complicated form will be milled to make the bed. I am intended to mount a collimator scope (like one used in EM-3 coilgun) on top, but didn't choose its type yet, so it is not presented on the sketch. Views: 15 | Added by: Eugen | Date: 17.04.2017 | Comments (0)

 27.02.2017 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). Views: 26 | Added by: Eugen | Date: 27.02.2017 | Comments (0)

 28.01.2017 PCBs for accelerating part of EM-4 coilgun have been mounted.   Views: 19 | Added by: Eugen | Date: 28.01.2017 | Comments (0)

 30.12.2016 Merry Christmas and Happy New Year! Views: 22 | Added by: Eugen | Date: 30.12.2016 | Comments (0)

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

Views: 22 | Added by: Eugen | Date: 30.12.2016 | Comments (0)

 9.12.2016 An animation illustrating principle of operation of the bistage accelerator is added to EM-4 coilgun page. Views: 19 | Added by: Eugen | Date: 09.12.2016 | Comments (0)

 26.10.2016 The scheme of accelerating part and power modules of EM-4 is finished. Corresponding section is added to EM-4 page. Views: 17 | Added by: Eugen | Date: 26.10.2016 | Comments (0)

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