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Viewing 164191 to 164220 of 169610
Technical Paper
1948-01-01
J. J. BROEZE, C. STILLEBROER
Technical Paper
1948-01-01
A. F. DONOVAN, H. HIRSCH
Technical Paper
1948-01-01
S. B. SHERWIN, D. O. MOELLER
Technical Paper
1948-01-01
BARTRAM KELLEY
Technical Paper
1948-01-01
W. E. SHIVELY
Technical Paper
1948-01-01
RALPH N. DuBOIS
Technical Paper
1948-01-01
S. T. B. CRIPPS
Technical Paper
1948-01-01
CARL F. BAKER
Technical Paper
1948-01-01
A. S. LEONARD
Technical Paper
1948-01-01
JORDAN P. JUNG, FRANK L. COERS
Technical Paper
1948-01-01
KENNETH J. FLECK
Technical Paper
1948-01-01
D. B. SHOTWELL
Technical Paper
1948-01-01
P. A. NOXON
Technical Paper
1948-01-01
BLAKE W. CORSON
SUMMARY A review is made of several wind-tunnel investigations dealing with the effect of ice on the aerodynamic efficiency of a propeller, as compared to the efficiency loss associated with a heated-air anti-icing system. The propeller aerodynamic characteristics, thrust coefficient, and efficiency with and without the simulated ice are presented. A heated-air thermal anti-icing system for propellers is discussed and the results of an analysis of the losses inherent in such a system for an idealized case is presented. Two wind-tunnel investigations of propellers incorporating internal-flow systems are described: for one investigation the system was simplified almost to the ideal case, in the other investigation a propeller with a complete heated-air anti-icing system was used. The measured losses of efficiency are shown to be in good agreement with those predicted by theory.
Technical Paper
1948-01-01
S. A. GORDON, G. E. HOLBACK
Technical Paper
1948-01-01
H. G. CONWAY
Technical Paper
1948-01-01
M. M. NEWMAN
Summary The modern all-metal transport airplane is in general inherently well protected from lightning damage. The metal surface of the airplane forms an inherent safe path for lightning currents around occupants and equipment in the interior. Certain external elements such as movable control surfaces, plastic sections, and outside antennas require protection against lightning. Therefore a thorough knowledge of the character of the lightning discharge and its various effects is of importance. This paper gives an introductory brief discussion of the nature of the lightning discharge phenomena and possible effects on aircraft.
Technical Paper
1948-01-01
EDWARD R. GRACE

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