Accession Number : AD0285079

Title :   DEVELOPMENT OF METHODS FOR PREDICTING V/STOL AIRCRAFT CHARACTERISTICS

Corporate Author : VEHICLE RESEARCH CORP PASADENA CALIF

Personal Author(s) : RETHORST,SCOTT ; FUJITA,TOSHIO

Report Date : 31 DEC 1961

Pagination or Media Count : 1

Abstract : DESCRIPTORS: *Vertical take-off planes, *Short take-off planes, *Helicopters, Mathe matical analysis, Mathematical prediction, Convertible airplanes, Design, Operations re search, Air force operations, Military re quirements, Jet planes, Flight paths, Aerody namic configurations, Airframes, Load distri bution, Computers, Nomographs, Tables, Aerodynamics. The analyses of the previous Phase I (AD-244 736) and Phase II (AD-257 571) studies are extended and refined. The relationships among basic V/STOL performance parameters are brought into focus. Results are cast into an engineering form. A 'slide-rule' type computer and a set of nomographs are furnished to simplify prediction of V/STOL aircraft characteristics. Propellerdriven V/STOL aircraft are analyzed in terms of trade-offs among basic performance parameters for a generalized mission profile. The attainment of high performance potential is dependent on the basic aerodynamic parameters governing the forward flight capabilities of conventional aircraft. For V/STOL aircraft the variable disc area parameter (ratio of hovering disc area to forward flight disc area) has a marked effect on performance potential. The 'slide-rule' and nomographs encompass a wide range of basic parameters including variable disc area and are applicable to prop-driven V/STOL aircraft. The analytical methods are applied to an advanced V/STOL specification (including growth potential as quantitatively determined in the analysis). (Author)

Descriptors :   *HELICOPTERS, *SHORT TAKEOFF AIRCRAFT, *VERTICAL TAKEOFF AIRCRAFT, AERODYNAMIC CONFIGURATIONS, AIR FORCE OPERATIONS, AIRFRAMES, COMPUTERS, CONVERTIBLE AIRPLANES, DESIGN, FLIGHT PATHS, JET AIRCRAFT, LOAD DISTRIBUTION, MATHEMATICAL ANALYSIS, MATHEMATICAL PREDICTION, MILITARY REQUIREMENTS, NOMOGRAPHS, OPERATIONS RESEARCH, TABLES(DATA)

Distribution Statement : APPROVED FOR PUBLIC RELEASE