Circular 79. Provisional Acceptable Means of Compliance: Gust Criteria

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Circular 79

Provisional Acceptable Means of Compliance: Gust Criteria

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PROVISIONAL ACCEPTABLE MEANS OF COMPLIANCE GUST CRITERIA ' Prepared by the Airworthiness Committee andF published by authority of the secretary General 1NTERNAT.IONAL CVIL, AVIATON ORGANIZATION MONTREAL 0 CANADA

Published in separate EngliFh, French and Spanish editiorr. by the International Civil A viation Organization. A N correspondence, except orders cmd su bscripiions, should be addressed to the Secretory General of iCAo, intt.mctrional Aviation Btrilding, 1080 University Street, Montreal 3 Quebec, Crtnada. Qrclers for this pubiication should be sent to one of the following atldrcsses, together with the appropriate remittance by bank draft ctr post office rnortcy arclcr in U.S. hllizrs or the etrrrcrzcy of the country in whih the order is Ilaccd or in a frccly crnvextihfu ctrrruncy Australia Rabeson and Mullens, 107 Peru Representante de la OACX, Oficina Elizabeth Street, Melbourne, C, 1. Sudambiica, Apartado 4127, Lima. Canada Department of Pubfie Printing and Stationery, Ottawa Ontario. Senegal Reprhsentant Je 10AC1, Bureau Afritruc, Boite postalc 2356, Dakar. France Reprhsentant de T'OACI, Bureau Europe, 3bis, villa gmile-8ergerat, Neuill y- Sweden C, E. Fritzes Kungl, Hovbokhan- sur-Seine Seine, del, Fredsgatan 2, Box 18356, Stockhuh 16. India Oxford Book and Stationery Co., Thailand fCAO Representative, Far East Sdndia use, New Dellti or 17 Park Srrer, and Pacific Office, P.O. Box 814, Bangkok. Calcutta. Japan . Japanese "IGAO'"ociety, Hikukan United Arab Repu biics 1CAO Represen- AGatiun Building, 1-18-I Skintoashi, tative, Middle East and Eastern African Minatoh, Tokyo. QRce, 16 EXassan Sabri, Zamalek, Cairo. Mexico Editorrial Wemes S.A., Xppacio United Kingdom Her kfajesty's Stationery MariscaE 41, MBxico 4, D.F, Office, P,O. Box 569, London, S.E, 1. ln ternational Civil Aviation Organization Attention Distribution OEfimr, international Aviation Building, 1080 University Street, Montrcal 3 Quebec , Canada. Do you receive the ICAO BULLETIN The lCAO Bulletin confains a concise account of the activities a6 the Organization as well CIS articles of inieres to ffie aero- nautical world. The Bulletin will also keep you up to date on the latest ICAO fheir contents, amendmenfr, supplements, corri- genda, cmd prices. Aahba in r.e rpugot. ediFionu Enlirh, French and Spanish. Annual rubscriptiam U.S. 2.00.

TABLE OF CONTENTS FOREWORD ...................... ................... APPLICABILITY .................. 1 . DEFINITIONS 2 . FACTOROFSAFETY ................ 3 . STRENGTH AND DEFORMATION ............ 4 . DESIGN AIRSPEEDS FOR GUST CONDITIONS ...... ................. 4.1 General 4.2 Design flap speed VF ........... 4.3 Design speed for maximum gust intensity VB 4.4 Design cruising speed VC ......... 4.5 Design diving speed VD .......... ................... . 5 GUSTLOADS 5.1 General .................. 5.2 Symmetrical gust conditions ........ 5.3 Asymmetrical gust conditions ....... 5.4 Dynamic response to turbulence ...... Page .............. 3

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