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
Non-Stop (novel) and faulting "the shock ending [which] is abrupt and leaves so much unanswered". He later compared the book's "impact to "Tumithak"". In 2000, the book was re-published as part of the SF Masterworks series. This edition contained some minor revisions by the author. Non-Stop (novel) Non-Stop is a 1958 science fiction novel by Brian Aldiss. It was the author's first novel. Originally published by Faber & Faber, it was published in the U.S. by Criterion Books as Starship in 1959. The novel has been frequently republished in the UK and US and translated into French, German, Danish and other languages.