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
Longest non-stop run in Indian Railways Longest non-stop run in Indian Railways It means the longest possible run between two consecutive booked halts, commercial halt or technical halt, of Indian Railways. But the train may stop in between this section due to other reasons like signal failure, loco failure, track work etc. This will not be taken in to account while considering the term non-stop run. Here the table is created in the sequence of lengthiest and fastest non stop run. It refers to the longest distance between two consecutive passenger halt (commercial halt) stations. There may be one or more technical halt in-between these two