AN ANALYSIS OF THE NORMAL ACCELERATIONS AND AIRSPEEDS OF A TWO-ENGINE TYPE OF TRANSPORT AIRPLANE IN COMMERCIAL OPERATIONS ON ROUTES IN THE CENTRAL UNITED STATES FROM 1948 TO 1950

摘要

Normal-acceleration and airspeed data obtained from NACA V-G recorders installed in a two-engine type of transport airplane, employed in routine commercial operation on a north-south route in the central part of the United States from 1948 to 1950, are analyzed to determine the gust and gust-load experiences of the airplane.. The accelerations experienced equaled or exceeded the limit-gust-load-factor increment, on the average, twice (once positive and once negative) in about 2.8 X 10° flight miles, and an effective gust velocity of 30 feet per second was equaled or exceeded, on the average, twice in about 0.7 X 10° flight miles. A comparison of these values with corresponding values from the same type of airplane during past operations indicates that the gust and gust-load experiences for the present operation agree well with the wartime (1941to 1945) experiences but were about 20 percent larger than the prewar (1937 to 1941) experiences.