Systems and methods for improved gearboxes for evtol aircraft

A method for balancing a rotor of an electrical engine of an electrical propulsion system comprising:

• identifying an axis of rotation of a rotor, wherein the rotor comprises a sacrificial layer having a mass M formed along a circumference of the rotor;
• determining an imbalance present in the rotor by rotating the rotor about the axis of rotation, wherein determining an imbalance includes marking the rotor, rotating the rotor, and detecting an amplitude of the imbalance;
• calculating an amount of mass k to add or remove at a position p along the sacrificial layer such that a center of mass of the rotor coincides with the axis of rotation of the rotor;
• and
• removing an amount of mass r from the sacrificial layer such that an amount of remainder mass n is present along the circumference of the rotor.

A method for balancing a rotor assembly of an electrical engine of an electrical propulsion system comprising:

• identifying an axis of rotation of a rotor, wherein the rotor comprises a sacrificial layer having a mass M formed along a circumference of the rotor;
• determining a first imbalance present in the rotor by rotating the rotor about the axis of rotation, wherein determining the first imbalance includes marking the rotor, rotating the rotor, and detecting an amplitude of the imbalance;
• calculating an amount of mass k to add at a position p along the sacrificial layer such that a center of mass of the rotor coincides with the axis of rotation of the rotor;
• removing an amount of mass r from the sacrificial layer such that an amount of remainder mass n is present along the circumference of the rotor;
• identifying an axis of rotation of a rotor assembly, wherein the rotor assembly comprises the rotor mechanically coupled to a sun gear;
• determining a second imbalance present in the rotor assembly by rotating the rotor assembly about the axis of rotation, wherein determining the second imbalance includes marking the rotor assembly, rotating the rotor assembly, and detecting an amplitude of the imbalance;
• calculating a number j of rivets to add to the rotor assembly such that the center of mass of the rotor assembly coincides with the axis of rotation of the rotor assembly;
• and
• adding the j rivets to the rotor assembly.