1945 2 Booster tests on September 27, 1945 1 Booster test with load on September 27, 1945 1 Booster test with dummy WAC Corporal on September 28, 1945 1 WAC Corporal to on October 11, 1945 1 WAC Corporal to approximately 235,000 feet on October 12, 1945 1 WAC Corporal to due to premature nose release on October 16, 1945 1 WAC Corporal to 235,000 feet with premature nose release on October 19, 1945 1 WAC Corporal launched with pressurization leak no performance recorded on October 25, 1945 1 WAC Corporal launched at night with nose release failure on October 25, 1945 Radar tracking was difficult, as above the radar return was too small to be detected, and radiosonde signals were not received. No previous American liquid-fueled rocket had exceeded a tiny fraction of the altitudes the WAC Corporal regularly achieved. It was decided on November 9, 1945, to alter the WAC Corporal design to improve upon it for another series of flights. This redesigned rocket was first deemed "Sergeant" in keeping with the JPL naming scheme but was soon renamed WAC Corporal B. The name "Sergeant" was later used for a solid propellant missile designed for the United States Army at JPL. Design of the WAC Corporal B was initiated in March 1946 with P.J. Meeks as Project Coordinator, and differed significantly in detail while its basic shape remained the same. It was longer, weighed less, and contained less propellant. The designs of the fuel pressurization system and fuel valves were simplified. It had a shorter engine with redesigned injectors weighed , rather than the longer engine of the WAC Corporal A. The drastically redesigned rocket body utilized separate tanks of dissimilar materials. Larger, lighter fins were supplied, which proved problematic on the first WAC Corporal B flight on December 6, 1946. The flights during the second series of WAC Corporal flights were: 1 Booster test on May 7, 1946 1 Booster test with test of nose cone separation and parachute recovery on May 20, 1946 2 Booster tests with test of nose cone separation and parachute recovery on May 23, 1946 2 Booster tests with test of nose cone separation and parachute recovery on May 24, 1946 2 Booster test with tests of nose cone separation and parachute recovery on May 26, 1946 1 Booster test with test of nose cone separation and parachute recovery on May 29,