5 Matching Results

Search Results

Advanced search parameters have been applied.

Effect of shallow water on the hydrodynamic characteristics of a flat-bottom planing surface

Description: Report presenting an investigation on the tank no. 2 monorail to determine the effect of shallow water on the hydrodynamic characteristics of a flat-bottom planing surface. Values of lift, drag, and trimming moment at a constant speed over a range of trim, wetted lengths, and clearances between the model and a false bottom in the tank.
Date: April 1956
Creator: Christopher, Kenneth W.
Partner: UNT Libraries Government Documents Department

Investigation of the planing lift of a flat plate at speeds up to 170 feet per second

Description: Report presenting an investigation in the high-speed hydrodynamics facility to determine whether planing lift coefficient of a flat-bottom planing surface remains constant with increasing speed at the high towing speeds obtainable. The generally accepted assumption that there is no effect of speed on the lift coefficient of positive-pressure lifting surfaces is valid at least up to 170 fps.
Date: March 1957
Creator: Christopher, Kenneth W.
Partner: UNT Libraries Government Documents Department

A method for calculation of hydrodynamic lift for submerged and planing rectangular lifting surfaces

Description: A method is presented for the calculation of lift coefficients for rectangular lifting surfaces of aspect ratios from 0.125 to 10 operating at finite depths beneath the water surface, including the zero depth or planing condition. Theoretical values are compared with experimental values obtained at various depths of submergence with lifting surfaces of aspect ratios from 0.125 to 10. The method can also be applied to hydrofoils with dihedral. Lift coefficients computed by this method are in good agreement with existing experimental data for aspect ratios from 0.125 to 10 and dihedral angles up to 10 degrees.
Date: January 1958
Creator: Wadlin, Kenneth L. & Christopher, Kenneth W.
Partner: UNT Libraries Government Documents Department

Full-Scale Hydrodynamic Evaluation of a Modified Navy J4F-2 Amphibian with a 0.425-Scale XP5M-1 Hull Bottom: TED No. NACA DE325

Description: An investigation was made to evaluate the hydrodynamic qualities of a 0.425-scale model of the Navy XP5M-1 hull, which was installed on a modified Navy J4F-2 amphibian. Longitudinal and directional stability during take-off and landing, low-speed maneuverability, spray characteristics, and take-off performance were investigated. The behavior of the airplane in moderately rough water was also observed. The opinions of three pilots have been correlated with the data.
Date: December 7, 1949
Creator: Land, Norman S.; Elliott, John M. & Christopher, Kenneth W.
Partner: UNT Libraries Government Documents Department

The effect of air-jet and strip modifications on the hydrodynamic characteristics of the streamline fuselage of a transonic airplane

Description: Report presenting 1/12-size model of a streamline fuselage modified by patterns of air jets or strips on the fuselage bottom. The effects of spacing of jets, length of jet rows, and direction of jets were determined for a simulated chine configuration. Data are presented on resistance, trim, effective hydrodynamic lift, and spray.
Date: June 3, 1949
Creator: Weinflash, Bernard; Christopher, Kenneth W. & Shuford, Charles L., Jr.
Partner: UNT Libraries Government Documents Department