7 research outputs found
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NACA Technical Notes
Report presenting an investigation of the hydrodynamic characteristics of a powered dynamic model of a hypothetical flying boat with a hull length-beam ratio of 9.0 in Langley tank no. 1. Results regarding trim limits of stability, center-of-gravity limits for stable take-off, landing stability, resistance, and spray characteristics are provided
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NACA Memorandum Reports
Report discussing the results of testing on a flying boat model with an afterbody length-beam ratio of 4.7 to determine its takeoff and landing stability and resistance characteristics.The range of stable trims was smaller than models with a conventional afterbody, but the range of stable positions for the center of gravity was about the same. Landing stability was satisfactory, and the hump resistance and trim is less than a boat with a smaller ratio
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NACA Technical Notes
Report presenting an investigation of the hydrodynamic qualities of a hypothetical flying boat with a hull with a length-beam ratio of 15 in tank no. 1. The flying boat had a design gross weight of 75,000 pounds, a gross load coefficient of 5.88, a wing loading of 41.1 pounds per square foot, and a power loading of 11.5 pounds per brake horsepower for take-off. Results regarding the longitudinal stability, spray characteristics, take-off performance, and summary chart are provided
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NACA Technical Notes
Report presenting an investigation of the principles for designing the optimum hull for a large long-range flying boat to meet the requirements of seaworthiness, minimum drag, and ability to take off and land at all operational gross loads. The aerodynamic and hydrodynamic qualities of the model were investigated in Langley tank no. 1
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NACA Technical Reports
"Principles for designing the optimum hull for a large long-range flying boat to meet the requirements of seaworthiness, minimum drag, and ability to take off and land at all operational gross loads were incorporated in a 1/12-size powered dynamic model of a four-engine transport flying boat having a design gross load of 165,000 pounds. These design principles included the selection of a moderate beam loading, ample forebody length, sufficient depth of step, and close adherence to the form of a streamline body. The aerodynamic and hydrodynamic characteristics of the model were investigated in Langley tank no. 1" (p. 1)