Airfoiled blade for cargo transport aircraft

Details Airfoiled blade for cargo transport aircraft Airfoiled blade for cargo transport aircraft

1997-03-10

1998-08-11

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416243, 416DIG5, 416DIG2, B64C 1118

Patent

active

057918783

ABSTRACT:
An airfoiled blade is disclosed which comprises a plurality of airfoil sections, a root portion, and a tip portion. Each section has along substantially the entire length thereof a cross-sectional airfoil shape characterized by a parabolic leading edge, a front loading and a blunt trailing edge. Each of the airfoil sections has a chord passing therethrough with a 50% point and a maximum thickness forward of the 50% point, toward the leading edge. A thickness ratio range from a first of the airfoil sections nearest the tip portion to a last of the airfoil sections nearest the root portion of substantially 3% to 28% is preferred. In one embodiment, the blade further includes a second airfoil section, a third airfoil section and a fourth airfoil section located between the first and last airfoil sections. The first airfoil section has a thickness ratio of substantially 3.3%, the second airfoil section has a thickness ratio of substantially 4.1%, the airfoil section has a thickness ratio of substantially 7.3%, the fourth airfoil section has a thickness ratio of substantially 14.3%, and the last airfoil section has a thickness ratio of substantially 27.4%.

REFERENCES:
patent: 4519746 (1985-05-01), Wainauski et al.
patent: 4773825 (1988-09-01), Rodde et al.
patent: 4830574 (1989-05-01), Wainauski et al.
patent: 4834617 (1989-05-01), Wainauski et al.
patent: 4911612 (1990-03-01), Rodde et al.
patent: 4941803 (1990-07-01), Wainauski et al.

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