Cascade rotor blade for low noise

Details Cascade rotor blade for low noise Cascade rotor blade for low noise

2007-10-16

2007-10-16

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Apertured or permeable

Reexamination Certificate

active

11129594

ABSTRACT:
Low-noise airfoils and methods of reducing noise. One embodiment provides an aerodynamic member that includes two body portions coupled to each other. The second body portion includes a plurality of airfoil members in a fixed relationship with each other. Optionally, the airfoil members may define an open end of the second body portion. In the alternative, the member can include a third body portion that has an airfoil shape and that is coupled to the second body portion opposite the first body portion. Preferably, the first portion, the airfoil members, and third portion are 12%, 8%, and 2% thickness/chord airfoils respectively. Further, the aerodynamic member may be a rotor blade on a tandem helicopter. Another embodiment provides a cambered airfoil with two coupled body portions one of which has air foil members. One of the body portions includes a slot there through with airfoil members on opposite sides of the slot.

REFERENCES:
patent: 1553627 (1925-09-01), Nagler
patent: 1804434 (1931-05-01), Reed
patent: 3166129 (1965-01-01), Bryan
patent: 4687416 (1987-08-01), Spranger
patent: 6789764 (2004-09-01), Bass et al.

Affiliated with

Also associated with

Rating

Cascade rotor blade for low noise does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cascade rotor blade for low noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cascade rotor blade for low noise will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3836502