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  • 1
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    The high-speed tank of the Hamburg Shipbuilding Company (1934)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A description of the Hamburg tank and carriage is provided as well as a layout of the control station and generator room.
    Type: NACA-TM-735
    Format: application/pdf
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  • 2
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    Experiments with Planing Surfaces (1934)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A previous report discusses the experimental program of a systematic exploration of all questions connected with the planing problem as well as the first fundamental results of the investigation of a flat planing surface. The present report is limited to the conversion of the model test data to full scale.
    Type: NACA-TM-739
    Format: application/pdf
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  • 3
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    Scale Effect of Model in Seaplane-float Investigations (1933)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: For the purpose of solving all the problems involved, an investigation was made with flat, rectangular planing surfaces. The investigation of a flat, rectangular planing surface, which can be considered as the portion of a flat float bottom lying in front of the step, has the advantage that the frictional resistance can be determined directly from the test results. Normal and tangential forces act on the lower side of the planing surface towed through still water, while the upper side and the lateral edges are under constant atmospheric pressure.
    Type: NACA-TM-704
    Format: application/pdf
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  • 4
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    Experiments with planing surfaces (1932)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Experiments with planing surfaces are fundamental, hydrodynamic researches for the purpose of obtaining the most favorable forms for planing boats, flying boats, and seaplane floats, with respect to water resistance and seaworthiness.
    Type: NACA-TM-661
    Format: application/pdf
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  • 5
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    New method of extrapolation of the resistance of a model planing boat to full size (1942)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The previously employed method of extrapolating the total resistance to full size with lambda(exp 3) (model scale) and thereby foregoing a separate appraisal of the frictional resistance, was permissible for large models and floats of normal size. But faced with the ever increasing size of aircraft a reexamination of the problem of extrapolation to full size is called for. A method is described by means of which, on the basis of an analysis of tests on planing surfaces, the variation of the wetted surface over the take-off range is analytically obtained. The friction coefficients are read from Prandtl's curve for turbulent boundary layer with laminar approach. With these two values a correction for friction is obtainable.
    Type: NACA-TM-1007
    Format: application/pdf
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  • 6
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    The Design of Floats (1938)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Following a summary of the multiplicity of domestic and foreign floats and a brief enumeration of the requirements of floats, the essential form parameters and their effect on the qualities of floats are detailed. On this basis a standard float design is developed which in model families with varying length/beam ratio and angle of dead rise is analyzed by an experimental method which permits its best utilization on any airplane.
    Type: NACA-TM-860
    Format: application/pdf
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  • 7
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    Systematic model researches on the stability limits of the DVL series of float designs (1949)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: 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.
    Keywords: Aircraft Stability and Control
    Type: NACA/TM-1254
    Format: application/pdf
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  • 8
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    Landing Procedure in Model Ditching Tests of Bf 109 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The purpose of the model tests is to clarify the motions in the alighting on water of a land plane. After discussion of the model laws, the test method and test procedure are described. The deceleration-time-diagrams of the landing of a model of the Bf 109 show a high deceleration peek of greater than 20g which can be lowered to 4 to 6g by radiator cowling and brake skid.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1247 , Wasserlandung Bf 109. Institut fuer Seeflugwesen er Deutschen Versuchaanstalt fuer Luftfahrt, E. V.
    Format: application/pdf
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  • 9
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    Analysis of Experimental Investigations of the Planing Process of the Surface of Water (1944)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: Pressure distribution and spray measurements were carried out on rectangular flat and V-bottom planing surfaces. Lift, resistance, and center of pressure data are analyzed and it is shown how these values may be computed for the pure planing procees of a flat or V-bottom suface of arbitrary beam, load and speed, the method being illustrated with the aid of an example.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1061 , Jahrbuch 1937 der Deutschen Luftfahrtforschung; 320-339
    Format: application/pdf
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