Systematic model researches on the stability limits of the DVL series of float designs / by W. Sottorf.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
National Advisory Commitee for Aeronautics,
[1949]
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| Series: | Technical memorandum (United States. National Advisory Committee for Aeronautics) ;
no. 1254. |
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| Abstract: | To determine the trim range in which a seaplane can take off without porpoising, stability tests were made of a Plexiglas model, composed of float, wing, and tailplane, which corresponded to a full-size research airplane. The model and full-size stability limits are in good agreement. After all structural parts pertaining to the air frame were removed gradually, the aerodynamic forces replaced by weight forces, and the moment of inertia and position of the center of gravity changed, no marked change of limits of the stable zone was noticeable. The latter, therefore, is for practical purposes affected only by hydrodynamic phenomena. The stability limits of the DVL family of floats were determined by a systematic investigation independent of any particular sea-plane design, thus a seaplane may be designed to give a run free from porpoising. |
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| Item Description: | "December 1949." NACA TM Number 1254. Translated from Jahrbuch 1942 der Deutschen Luftfahrtforschung, pp. I-451-I-465, by the National Advisory Commitee for Aeronautics. |
| Physical Description: | 49 pages : illustrations ; 27 cm. |
| Bibliography: | Includes bibliographical references. |