This is a very interesting graph of data we collected using the same cork as the pressure in the feed tank (bottom trace) declined with each firing. The time (count) pattern shows erratic performance and slower speeds at very high pressures followed by a dramatic increase in cork velocity at about 40psi. A fairly stable and smooth curve from 40psi to 20psi where the speed then falls off to a new regime at slower speeds. For perspective, 146 f/s = 100 mph. Double clicking on the graph will bring up a larger and more readable view.
