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Calculated Responses of a Large Sweptwing Airplane to Continuous Turbulence with Flight-test Comparisons
Summary: Calculated responses of symmetrical airplane motions, wing deformations, and wing loads due to continuous turbulence are shown to compare favorably with available flight-test results. These calculated responses are based on random-process theory, five degrees of freedom, lifting-surface aerodynamics, and one-dimensional turbulence. Of the five degrees of freedom used only three, rigid-body translation and pitch modes and the first wing bending mode, are shown to contirbute significantly to the airplane responses over the frequency range considered (0 to 2 cps). Bending-moment amplification factors are presented in order to show the effects of dynamic aeroelasticity. These effects are found to increase the response by 35 to 115 percent, depending upon the spanwise station.
NASA Technical Note
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Floyd Bennett Field
Although New York City was slowly recognizing the need for a municipal airport in the late 1920s, it sought to regain prominence by constructing the most advanced airport of its day. Construction in the far reaches of Brooklyn was started on October 29, 1929, the day of the stock market crash that heralded the Great Depression. The airport was named posthumously for Floyd Bennett, a Brooklyn native, Navy pilot, and Medal of Honor winner. Unfortunately, because of many factors--including poor timing, politics, and remoteness from Manhattan--the airfield was a commercial failure. Its advanced features, however, made it a mecca for private aircraft and the site of numerous record-breaking flights.
NASA Memorandum
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Technical Note
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