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
Parking Non-Stop as a recording project, Parking Non-Stop have played live several times during their lifetime, often in collaboration with like-minded musicians, poets and artists. Performances to date have taken place in several European countries, including Wales, England, Ireland, Slovakia, Bosnia, Germany, Czech Republic, Norway, Romania and France. In addition to producing music and sound collage, Parking Non-Stop also make films, which are used as projections during their live performances. These films tend to be very slow moving and uneventful in order to enhance, rather than detract from the sound. Some examples can be viewed on the group's YouTube channel (see external