Acceleration and airspeed data taken on four Sikorsky S-42A airplanes operated on Caribbean routes and along the east coast of South America have been analyzed and the results indicate that the flight loads seem about average in comparison with the flight loads of other types of airplanes operated on different routes. The limit gust load factor of the S-42A airplanes will be exceeded, on the average, once in about 3 X 10 7 flight miles. The loads of the Sikorsky S-42A airplanes were less conservative than the loads of the Boeing S-307 airplanes, both of which were operated in the same general region; this difference was attributed to the higher ratio of probable speed of maximum acceleration occurrence to the design maximum level-flight speed (V sub p)/(V sub L) of the S-42A airplanes. Caribbean operations of the S-42A and the S-307 airplanes are in good agreement with respect to route roughness and do not show greater route roughness than most of the other routes compared.


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    Title :

    Analysis of the Airspeeds and Normal Accelerations of sikorsky S-42A Airplanes in Commercial Transport Operation


    Contributors:

    Publication date :

    1948


    Size :

    15 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English