On the Response of Airplanes in a Three-Dimensional Gust Field
AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC NJ
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The response of an airplane in a 3-dimensional gust field is examined with the intent of reducing the problem to the simplest terms. It is shown that response evaluation may be reduced to separate treatment of the longitudinal and lateral response cases. The longitudinal case reduces to considering the vertical gust velocities only, and generally the degrees of freedom of vertical motion, pitch, and vertical bending modes vertical motion is the prime degree of freedom. The lateral case reduces to side gust velocities only, with degrees of freedom of side motion, yaw, and side bending yaw is the prime degree-of- freedom in this case. The longitudinal gusts are found to be unimportant. The analysis show that the results from the separate longitudinal and lateral response evaluations must be combined to obtain the fuselage loads and loads on T-type tails.