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Conceptual/preliminary design study of subsonic v/stol and stovl aircraft derivatives of the S-3AA computerized aircraft synthesis program was used to examine the feasibility and capability of a V/STOL aircraft based on the Navy S-3A aircraft. Two major airframe modifications are considered: replacement of the wing, and substitution of deflected thrust turbofan engines similar to the Pegasus engine. Three planform configurations for the all composite wing were investigated: an unconstrained span design, a design with the span constrained to 64 feet, and an unconstrained span oblique wing design. Each design was optimized using the same design variables, and performance and control analyses were performed. The oblique wing configuration was found to have the greatest potential in this application. The mission performance of these V/STOL aircraft compares favorably with that of the CTOL S-3A.
Document ID
19810020580
Document Type
Technical Memorandum (TM)
Authors
Kidwell, G. H., Jr. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1981
Subject Category
AIRCRAFT DESIGN, TESTING AND PERFORMANCE
Report/Patent Number
A-8665
NASA-TM-81310
Funding Number(s)
PROJECT: RTOP 505-42-71
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19810020580.pdf STI