US 12,486,026 B1
Aerodynamic rotor blade strake
Neel Vora, San Mateo, CA (US); and Pranay Sinha, Sunnyvale, CA (US)
Assigned to Wisk Aero LLC, Mountain View, CA (US)
Filed by Wisk Aero LLC, Mountain View, CA (US)
Filed on Dec. 11, 2023, as Appl. No. 18/535,900.
Claims priority of provisional application 63/432,183, filed on Dec. 13, 2022.
Int. Cl. B64C 11/14 (2006.01); B64C 23/06 (2006.01)
CPC B64C 23/06 (2013.01) [B64C 11/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aircraft comprising:
a fuselage;
a pair of wings coupled to opposite sides of the fuselage;
a propulsion system coupled to a first wing of the pair of wings, wherein the propulsion system comprises:
a spinner;
a first rotor blade including a first blade portion and a first root portion, the first rotor blade configured to move between a first pitch position and a second pitch position, wherein the second pitch position is higher than the first pitch position;
a first strake coupled to the spinner and positioned adjacent to and downstream of the first root portion of the first rotor blade, wherein the first strake is fixed and seamlessly aligned with the first rotor blade when the first rotor blade is in the second pitch position;
a second rotor blade, the second rotor blade including a second blade portion and a second root portion, the second rotor blade configured to move between a third pitch position and a fourth pitch position;
a second strake coupled to the spinner and positioned adjacent to and downstream of the second root portion of the second rotor blade, wherein the second strake is fixed and seamlessly aligned with the second rotor blade when the second rotor blade is in the fourth pitch position;
a third strake coupled to the spinner and positioned adjacent to and upstream of the first root portion of the first rotor blade, wherein the third strake is fixed and seamlessly aligned with the first rotor blade when the first rotor blade is in the second pitch position; and
a fourth strake coupled to the spinner and positioned adjacent to and upstream of the second root portion of the second rotor blade, wherein the second strake is fixed and seamlessly aligned with the second rotor blade when the second rotor blade is in the fourth pitch position.