Fuselage self-propulsion by static-pressure thrust - CAFE Foundation

potential 60% power saving for 2-seat aircraft and 40% 9. F. R. Goldschmied, "Proposal for the study of
power for 4-seat aircraft, as to Application of Boundary-Layer Control to Lighter-
than-air CFsft", Goodyear Aircraft Corp. Rpt.
specific current designs. A similar study was GER-5796, 1954.
presented by the same author (1986)35 for general
aviation aircraft based on the McLemore (1962)
body/wake-propeller configuration.
Pressure thrust is the most efficient form of
fuselage self-propulsion; it is based on the best
34 10. F. R. Goldschmied, 'A Theoretical Aerodynamic
Analysis of a Boundary Layer Controlled Airship
Bull", Goodyear Aircraft Corp. Rpt. GER-6251,
1954.
11. D. Kuchemann and J. Weber, wAerodynamics of
Propulsion", McGraw Bill Book Co., 1953.
possible implementation of the BLC system. It cannot
be overemphesized that the most careful
be 12. B. Edwards, "Laminar Flow Control-Concepts,
Experiences, Speculations", AGARD Rpt. 654,
given to thc optimization of this system for any given "Special Course on Concepts for Drag Reduction",
aircraft design application.
April 1977.
Acknowledgements
The contributions of Justin McCarthy and of Dennis
Bushnell are gratefully acknowledged by the author.
At the David W. Taylor Naval Ship R&D Center,
McCarthy convinced the author that a new look was
needed by pointing out, again and again, that the
skin-friction drag was always there, acting on the
body's wetted area, no matter what was done to the
boundary-layer at the tail, At the NASA Langley
Research Center, Bushnell was the first to suggest the
pressure thrust concept for bodies and to hold many
useful discussions with the author
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~
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