rdgreenwood wrote:
While I was working for Hughes Tool Company, Aircraft Division, as a technician, I had the job of working on the development of new forms of 20mm projectiles for machine guns. I took this photo, using a Red Lake (I think that was the brand) Streak Camera. The camera, a 16mm camera loaded with Tri-X, would start ahead of the gun's firing, so it would be moving the film at the same speed as the bullet was heading down range, but in the opposite direction. The result would be (about 25% of the time) a bullet stopped in flight. Because we had to slow the bullet's speed down to somewhere in the neighborhood of 1500 fps, we removed powder from the cartridge and filled the space with toilet paper (We had to do this to keep the chamber pressure up.) This scan of an 8x10 shows the bullet and the toilet paper flying down range at about 1500 fps. So, what's the fastest thing I've ever photographed: I'd say it's a tie between a bullet and a wad of TP.
While I was working for Hughes Tool Company, Aircr... (
show quote)
That's neat, RD ....
Shame about the toilet paper, though ... I guess you couldn't re-use it, after that - huh?