Propfan blade attachment

Details Propfan blade attachment Propfan blade attachment

1988-09-20

1990-04-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Radially extensible or retractible rotor working member

Having pitch adjustment

416142, 416129, 416171, B64C 1128

Patent

active

049155865

ABSTRACT:
A blade attachment between a propfan blade and a propfan hub in a propfan propulsion system for a tube-launched expendable aircraft, the attachment including a hinger on a rotatable propfan hub on the aircraft, a stem of the propfan blade rotatably supported on the hinge, a pitch control arm rigidly attached to the propfan blade, and a pitch control link universally articulated at opposite ends to the pitch control arm and to the propfan hub. When the hinge is extended, the pitch control arm and pitch control link locate the propfan blade in a folded position generally flat against the fuselage of the aircraft for storage in and launch from a tube. After launch, the hinge rotates to a retracted position and the pitch control arm and pitch control link concurrently rotate the propfan blade to an unfolded position for propelling the aircraft forward when the propfan hub rotates.

REFERENCES:
patent: 2026885 (1936-01-01), Goddard
patent: 2233031 (1941-02-01), Price
patent: 2808116 (1957-10-01), Kapelski
patent: 2981339 (1961-04-01), Kaplan
patent: 2990149 (1961-06-01), Samms
patent: 3016217 (1962-01-01), Polleys et al.
patent: 3087553 (1963-04-01), Kostyun
patent: 3175619 (1965-03-01), Reed
patent: 3669371 (1972-06-01), Romhild et al.
patent: 3903801 (1975-09-01), Senoski
patent: 3957229 (1976-05-01), Davis
patent: 4394109 (1983-07-01), Ritchie

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