Question Mark (aircraft) Question Mark (aircraft) Question Mark (""?"") was a modified Atlantic-Fokker C-2A transport airplane of the United States Army Air Corps. In 1929, commanded by Major Carl A. Spaatz, it was flown for a flight endurance record as part of an experiment with aerial refueling. "Question Mark" established new world records in aviation for sustained flight (heavier-than-air), refueled flight, sustained flight (lighter-than-air), and distance between January 1 and January 7, 1929, in a non-stop flight of more than 150 hours near Los Angeles, California. Following the record-setting demonstration, the C-2A was returned to transport duties. In 1931 more powerful engines replaced
The Airplane Factory aircraft design and production processes. The company produces the two-seat The Airplane Factory Sling 2, which was first flown in 2008 and the four-seat The Airplane Factory Sling 4, introduced in 2009. In July 2013 a Sling 4 was flown by Mike Blyth and his son from South Africa to AirVenture in Oshkosh, Wisconsin, United States. The flight included a 14-hour over-water leg using the modified Sling 4's 20 hours of fuel endurance. The Airplane Factory The Airplane factory (Pty) Ltd. is a South African aircraft manufacturer based at Tedderfield Airpark, Eikenhof, Johannesburg South. The company specializes in the design