( 46502 of 46504 ) |
United States Patent | 3,558,081 |
Williams | January 26, 1971 |
An airborne vehicle provided with a rotor assembly consisting of a hub and a plurality of blades spaced axially of the hub, each blade including an inboard section having a forwardly inclined torque vector and an outboard section having a rearwardly inclined torque vector, the chord of the inner section being greater than that of the outer section.
Inventors: | Williams; Paul E. (Purcellville, VA) |
Assignee: |
Airmarine Corporation
(Washington,
DC)
|
Appl. No.: | 04/800,936 |
Filed: | February 20, 1969 |
Current U.S. Class: | 244/17.19 ; 416/170R; 416/19; 416/198R; 416/242 |
Current International Class: | B64C 27/00 (20060101); B64C 27/10 (20060101); B64c 027/06 (); B64c 011/18 () |
Field of Search: | 244/17.19,17.11,17.21,17.23,17.25 416/19,190,198,170,223,228,235,237,242 |
2080224 | May 1937 | Lily |
2422098 | June 1947 | Heintzelman |
3065933 | November 1962 | Williams |