Bell Aircraft In December 1942,
Bell Aircraft chief test pilot
Robert Stanley offered Johnston a position as a production test pilot. After
World War II ended, Johnston convinced
Larry Bell to purchase two war-surplus Airacobras to be modified and entered in the
National Air Races as a publicity stunt. The two P-39's were named Cobra I and II, with Johnston flying Cobra II and his flight test boss
Jack Woolams flying Cobra I. The day before the race, Cobra I crashed into Lake Ontario from a suspected canopy failure, killing Woolams. Johnston helped design and later flew the rocket-propelled
Bell X-1 at a speed of
Mach .72 on May 22, 1947. He stayed on the program as a design advisor on modifications to the trim controls that he discovered were unusable in their manufactured configuration at high subsonic speeds. Later that year,
Chuck Yeager would become famous for breaking the
sound barrier in this aircraft. Once the X-1 project began to taper off, Bell Aircraft made the decision to enter the fledgling
helicopter industry. Johnston learned to fly helicopters, but his passion remained for airplane testing. and piloted the first flight of the
Boeing B-52 Stratofortress prototype. Johnston is best known for performing a barnstormer-style
barrel roll maneuver with Boeing's pioneering
367-80 jet in a demonstration flight over
Lake Washington outside
Seattle, on August 7, 1955.
Bill Allen, the then-president of Boeing, had invited many aero-space and airline executives to enjoy Seattle's
Seafair aboard his yacht. Allen had asked Johnston to make a
fly-by over Seafair to show off Boeing's new airliner. Johnston performed the barrel roll during the fly-by, reversed course with a
chandelle, and performed a second barrel roll on the way back. The following Monday, Allen called Johnston to his office and asked what he thought he was doing, to which he responded with "I was selling airplanes," and explained the maneuver was not hazardous. He kept his position as a test pilot, and did not get in legal trouble for his actions on the condition that he did not do it again. ==Program manager and later life==