2-p, did you do any work on this or have any additional recollections from AEDC?
Rocketman; No didn't do any work directly related to these experiments. Many other tests were also run there in what was known as "G-Range" which fired projectiles of about 1" dia as I recall from a "Gun" built using surplus breeches from 16" naval guns. A powder charge was placed behind a polyethelene piston molded around a 98lb lead slug in a short bore stopped by a pre-creased diaphram leading into a smaller bore & followed by another diaphram leading into the final 1" bore. Tremendous velocities were built up as the pressure built up to the point it would burst the diaphrams & enter the smaller area of the next bore. I did work on several occasions on repairing this High Pressure chamber section, which would swell from continued use & we would bore it out & re-line it. Also threaded some breech blocks for it which used a coarse interrupted Buttress thread so it would slide in, then lock with a ¼ turn.
One building there had many photographs on the wall with pictures of these projectiles showing the shock waves & also impact photos. Along side them someone had hung an old cast iron skillet with the caption 12ga Slug b@ x Yards, don't recall exact range now, but think it was 40yds.
