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meteorologist, called for a cruising altitude of 5,000 feet for the Chicago-Cincinnati portion of the route. His flying time was estimated as one hour and nine minutes from Chicago to Indianapolis and 38 minutes from Indianapolis to Cincinnati. The flight plan and clearance were approved by the Airway Traffic Control[1] at Chicago, Illinois, prior to the departure of the flight. The aircraft was fueled at Chicago to depart with 621 gallons of gasoline in the tanks, which was more than sufficient for the trip from Chicago to Cincinnati at normal cruising power; and in case of necessity, provided a sufficient reserve to proceed from Cincinnati to Columbus, the alternate terminal, and thereafter for more than four hours.
Trip 20, with Captain Bryant at the controls, departed from the loading ramp at Chicago Municipal Airport at 5:15 p.m. (CST), and took off at 5:24 p.m., after having been detained on the ground a few moments by the Chicago airport control tower[2] on account of other traffic. Captain Bryant climbed the aircraft to 5,000 feet above sea level and, flying at this altitude in accordance with his flight plan, proceeded on instruments toward Cincinnati. Position
- ↑ The Airway Traffic Control staff, a part of the Civil Aeronautics Administration, regulates the flow of traffic over a civil airway during instrument weather conditions in order to eliminate the possibility of collision between aircraft. Before flying on a civil airway under instrument weather conditions approval must be secured from Airway Traffic Control for the flight, including the altitude at which it is to be flown.
- ↑ Airport control towers are erected and maintained by municipalities at various municipal airports for the purpose of regulating the flow of air traffic in the vicinity of the airport, in order to eliminate the possibility of collision between aircraft. These towers are normally equipped with radio receivers tuned to air carrier company frequencies, as well as those frequencies used by military and privately-owned aircraft. They are also usually equipped with a transmitter which operates on 278 kilocycles.
