Fluid reaction surfaces (i.e. – impellers) – Method of operation
Patent
1988-09-30
1991-10-08
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Method of operation
416129, 244 69, 244110B, B64C 1148
Patent
active
050549987
ABSTRACT:
A method of creating thrust reversal for an engine having counter-rotating forward and rear propeller blades. The forward blades are set at a positive angle of attack to produce an orderly flow of air toward the rear blades. The rear blades are set at a negative angle of attack to produce reverse thrust. The net effect is that the thrust produced by the rear blades overbalances that of the forward blades to produce net thrust reversal.
REFERENCES:
patent: 2126221 (1938-08-01), Sessums
patent: 2216013 (1940-09-01), Kenney
patent: 2228638 (1941-01-01), Mercier
patent: 2455239 (1948-11-01), Doussain
patent: 2533346 (1950-12-01), Brady et al.
patent: 2584115 (1952-02-01), Dinsmoor
patent: 2607430 (1952-08-01), Dean
patent: 2672115 (1954-03-01), Conover
patent: 2674407 (1954-04-01), Ostrognai
patent: 2982361 (1961-05-01), Rosen
patent: 3646834 (1972-03-01), Davis
patent: 3830587 (1974-08-01), Shipes et al.
patent: 3986794 (1976-10-01), Korn
patent: 4483658 (1984-11-01), Levine
patent: 4486146 (1984-12-01), Campion
patent: 4621978 (1986-11-01), Stuart
`Power Flow in a Differential`, Machine Design, Apr. 8, 1976 Fred A. Shen, pp. 77-79.
Larson James A.
Look Edward K.
The Boeing Company, Inc.
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