

Air-driven positive displacement pumps (1) supply water under pressure to the Mk I 9-in. pressure 

 vessel (2). Pressure is monitored by gage (3) and recorded. Dial indicator (4) is watched via 

 closed-circuit television camera (5) and monitor (6). Operator is thus enabled to record data 

 behind safety barricade. 



Figure 8. Schematic plan of experimental setup. 



Figure 9. Pressure gages, pumps, and closed -circuit television monitor 

 used behind barricade during testing. 



10 



