Accession Number : AD0649332

Title :   HYDROFOIL SIMULATION EQUATIONS STUDY: MATHEMATICAL MODEL REPORT: VOLUME II. EQUATIONS AND METHODS FOR SIMULATION OF HULL LIFT, DRAG AND PITCH MOMENT,

Corporate Author : BOEING CO SEATTLE WASH ADVANCED MARINE SYSTEMS ORGANIZATION

Personal Author(s) : Jamieson,J. J.

Report Date : DEC 1966

Pagination or Media Count : 11

Abstract : In anticipation of the growing use by the U. S. Navy of hydrofoils as gun boats, patrol boats, and as antisubmarine warfare craft, a study was initiated to formulate the mathematical models required for simulating the hydrofoil as a pilot-controlled training situation and as a target or own-ship vehicle. This report presents the results of the study. The mathematical formulation was developed in three parts; each part is treated as the topic of a separate volume of the report. Volume II treats hull lift, drag and moment relationships as they pertain to craft operation on a straight course in smooth water. The methods described depend on the availability of hull model data covering the full range of speed, draft, and pitch angles experienced by a hull during take-off and landing transitions. Material presented in the three volumes enables a person to assemble a hydrofoil simulation which will demonstrate craft dynamic behavior during take-off or landing in smooth water, during foilborne maneuvers in smooth water or regular waves, and during foilborne operation on a fixed heading in realistic seas. The limitations inherent in the work at present result mainly from a lack of a complete theoretical or empirical description of foil and strut hydrodynamic characteristics. For future improvements in simulation realism, advancements must be supported in the field of hydrofoil hydrodynamics.

Descriptors :   (*HYDROFOILS, PERFORMANCE(ENGINEERING)), SIMULATION, MATHEMATICAL MODELS, HYDRODYNAMIC CONFIGURATIONS, MOMENTS, LIFT, DRAG, PITCH(MOTION), HULLS(MARINE), DIGITAL COMPUTERS

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE