Boeing 727-100 (N32720)

727-63 General Electric Unducted Fan (UDF) Testbed, N32720 at the Mojave Airport on November 9, 1986. In 1986, General Electric modified a 727-63 to test an unducted fan (UDF) engine in place of the starboard turbofan engine. The engine powered two counter-rotating fans with eight blades each. They were expected to achieve significant improvements in fuel efficiency and were planned to power a proposed 150-seat airliner dubbed the 7J7. The modified UDF Testbed made its first flight at the Mojave Airport in August 1986.