US 12,420,918 B2
Rotor blade tracking wedge with porous elements
Michael J. McNulty, Scottsdale, AZ (US); and Robert T. Loftus, Gilbert, AZ (US)
Assigned to HAYMATT, L.L.C., Phoenix, AZ (US)
Filed by HAYMATT, L.L.C., Phoenix, AZ (US)
Filed on Apr. 12, 2023, as Appl. No. 18/133,748.
Claims priority of provisional application 63/330,559, filed on Apr. 13, 2022.
Prior Publication US 2023/0331377 A1, Oct. 19, 2023
Int. Cl. B64C 27/00 (2006.01); B64C 11/00 (2006.01)
CPC B64C 27/001 (2013.01) [B64C 27/008 (2013.01); B64C 11/008 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A detachably attachable wedge for a rotor blade of a helicopter for reducing blade pitching moment dynamic unbalance and aircraft vibrations, said wedge comprising:
a. an adhesive layer coupling a surface of a rotor blade and a surface of the wedge;
said wedge comprising at least a first porous and/or permeable section;
wherein an incident angle of the at least first porous and/or permeable section is obtuse or acute.