The Mustang was most likely the greatest fighter of World War II. The mustang originated because the British required an aircraft that was well suited to their increasingneeds during WWII. The initial engine was not fully capable which forced North American engineers to resort the to Packard Merlin V-1650 engine in 1943 B model. The Mustang was now known for it's long range and effectiveness at high-altitude.

Pay's  particular Mustang was registered to the RAAF in 1947 and served for 11 years. VH-AUB was painted red after 1958 and was rarely flown until it was dismantled in 1966 and transported to an outback station in Queensland, Australia. In 1978 VH-AUB was to become one of Col Pay's pride and joy. Restoration began and the aircraft was repainted to it's original RAAF colour scheme. VH-AUB is still in the possession on Pay's Air Service and frequents Australian air shows every year.