As project pilot on the B-52 launch aircraft, Fullerton was involved in tests to develop a new F-111 crew module recovery system, and air launching the commercially-developed Pegasus space vehicle.
As project pilot on the B-52 launch aircraft, Fullerton was involved in tests to develop a new F-111 crew module recovery system. He also flew the B-52 for the first six mid-air launchings of the commercially-developed Pegasus space vehicle.