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By A. S. Taylor, D. J. Eckford (Eds.)

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Additional info for Aircraft Loading Action Problems (Proceedings of a Symposium held at Farnborough on 28th October, 1966)

Example text

C. Coldberg. Dowty Rotol said that which dealt with landing and take-off loads, definition of the vertical could possibly be refined was true but, while this in the section of the report Mr. Tye had said that the velocities of descent was well established if operational statistics could be obtained. refinement was taking place, one would like but This to discover how the lift forces disappeared as the aircraft touched down and, conversely, how they built up during t-g. These factors had an appreciable effect on the rate of growth of the ground reactions.

Thu canbe consIdered as one cycle of excitation at a frequency determined by the length of the gust and the forward speed of the sarcraft. If the gust length IS chosen such that the eqruvalent forcing frequency is equal to the natural . 166 47 .. ‘-: -3 . frequency of vibration of the wing, very large loads may be structure. B. that a length of 100 ft should be used. This represents a forcing about 4 c/s at VC at Zoo00 ft which is slightly higher than mental frequency of about 3 c/s. produced in the minimum gust frequency of the wing funda- The introduction of gusts of varying lengths into the requirement3 has added another complication to the determination of the critical gust loads.

5g mnoewre at VA cases. cases which give identical loads within a very close margin. The development of 'stretched' versions of the aircraft leads to a point where the actual configuration of the aircraft depends on the design loads. For example, if it is desirable to improve the landing or take-off performance by increasing the wing span or by extending the flap area but without expensive modifications to the structure in the wing root, the final configuration of the wing till be determined by working back from the permissible structural loads to the permissible wing span and flap geometry.

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Aircraft Loading Action Problems (Proceedings of a Symposium held at Farnborough on 28th October, 1966) by A. S. Taylor, D. J. Eckford (Eds.)


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