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The Bell X-1A was similar to the Bell X-1, except for having turbo-driven fuel pumps (instead of a system using nitrogen under pressure), a new cockpit canopy, longer fuselage and increased fuel capacity. The X-1A arrived at Edwards Air Force Base, California on January 7, 1953, shackled to the EB-50A (47-006A), with the first glide flight being successfully completed by Bell pilot, Jean "Skip" Ziegler.
Additional Information
The airplane made five powered flights with Ziegler at the controls. The USAF was attempting a Mach 2 flight and USAF test pilot Charles "Chuck" Yeager was eager. He reached speed of Mach 2.435, at a altitude of 75,000 feet on December 12, 1953, a speed record at the time.
But all was not well, the aircraft encountered an inertia coupling phenomenon and went out of control. Once the X-1A had
entered the denser atmosphere (35,000 feet) it slowly stabilized and Yeager was able to return to Edwards. The aircraft had experienced high-speed roll-coupling, something aerodynamicists had predicted, but this was the first actual encounter.
On August 26, 1954 Major Arthur Murray, USAF test pilot flew the X-1A to an altitude record of 90,440 feet. NACA High-Speed Flight Station received the aircraft in September 1954 and returned it to Bell for the installation of an ejection seat. NACA test pilot Joseph Walker made a familiarization flight on July 20, 1955 followed by another scheduled flight on August 8, 1955.
Shortly before launch the X-1A suffered an explosion. The extent of the damage prohibited landing the crippled aircraft. The
X-1A was jettisoned into the desert, exploding and burning on impact. Walker and the B-29 crew returned to base in
satisfactory condition. Four pilots had completed 29 (including aborts) flights.
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