On 6 July 2013 23:28, Gene Heskett <ghesk...@wdtv.com> wrote: > Depends on what you use to measure it. The strain gauge, epoxied to the > barrel can give you extremely accurate snapshots that if done twice, one on > down the barrel about a foot from the one on the chamber, can be computer > processed to recover the bullets location and speed microsecond by > microsecond.
The Split Hopkinson Bar is an interesting device. I visited someone who worked on them. He was a slightly odd academic, with his own network of bunkers. He excited his bars with explosives. The strain rates he achieved were a couple of orders of magnitude higher than I wanted. (and even the very fastest servo-hydraulic machines were an order of magnitude slower, which was awkward.) http://en.wikipedia.org/wiki/Split-Hopkinson_pressure_bar And the bunkers: http://goo.gl/maps/LM7Ex They also have a pair of railway tracks that are arranged so that the trucks miss each other, but the test samples hanging off the side don't. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
