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Tank Investigation of a Powered Dynamic Model of a Large Long-Range Flying BoatPrinciples 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. Tests were made to determine the minimum allowable depth of step for adequate landing stability, the suitability of the fore-and-aft location of the step, the take-off performance, the spray characteristics, and the effects of simple spray-control devices. The application of the design criterions used and test results should be useful in the preliminary design of similar large flying boats.
Document ID
19930091942
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Parkinson, John B
Olson, Roland E
Harr, Marvin I
Date Acquired
September 6, 2013
Publication Date
January 1, 1947
Report/Patent Number
NACA-TR-870
Accession Number
93R21232
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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