The ratio of the speed of an object to the speed of sound is known as Mach 1.0. His research led to the term ‘Mach number’. Physicist Ernst Mach published a photograph in 1887, showing the shock waves of an object moving at a ‘supersonic’ speed. Local shock waves form on the exterior of the craft causing unstable airflow and resulting in loss of control and stability. The sound waves the aircraft creates spread out ahead of it, but once reaching sonic speed, the aircraft catches up with these waves and results in a sonic ‘boom’. As an aircraft approaches the speed of sound, it experiences a steep rise in aerodynamic drag. At 20☌ the speed of sound in dry air is 343m/s. The speed of sound varies, depending on air quality. Photo of Jacqueline Cochran from FAI record file archives Records from She also became, on that day, the first woman to break the sonic barrier. On, Cochran, who had trained on the course in a T-33, recorded a speed of 1,050.15 km/h, beating him by 27 km/h. But could I hold that plane in a banked position of 30 degrees for a 63-mile circular flight and beat Colonel Ascani's mark of 635 mph?”Īscani had reached gained a speed record of 1,023.04 km/h in 1951. If all went well, I’d have a margin of two minutes of fuel after two complete passes. “I’d get two chances-just two-to set my record because that’s all the fuel the plane could carry. In her autobiography, published in 1987* the famous American pilot recalled her challenge: Her goal was a speed record, over a distance of 100km above Rogers Dry Lake, California, USA. The aircraft was a Canadian-built F-86 Sabre Mk, loaned to Cochran by the Canadian Air Force.
Jacqueline Cochran was already a highly decorated pilot with numerous speed records to her name when she slid into the cockpit on ready for another record attempt.
FAI General Air Sports Commission (CASI).Amateur-Built and Experimental Aircraft (CIACA).
Amateur Built and Experimental Aircraft.
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