Devices and methods to verify main rotor swashplate positioning

A method of verifying main rotor swashplate positioning of a rotorcraft comprising:

• providing a verification device;
• placing the verification device in contact with a convex curvature of a collective sleeve of a main rotor mast;
• placing at least one of an upper and lower surface of the verification device in contact with a corresponding flange of the collective sleeve;
• rotating the verification device around the collective sleeve;
• contacting a swashplate lug of the main rotor swashplate by a gradient surface of the verification device;
• measuring, by a plurality of graduation indications on the gradient surface, a height of the swashplate lug;
• and
• evaluating if the measured height is within an acceptable range.

A method of verifying main rotor rigging of a rotorcraft comprising:

• determining, using a verification tool, whether first, second, and third swashplate lugs of a swashplate assembly that are coupled to respective first, second, and third actuator assemblies are positioned according to a predetermined angle relative to a main rotor mast and at a predetermined collective height, the verification tool comprising:
• a gradient surface having a plurality of graduation indications,
• wherein the plurality of graduation indications is grouped into first, second, and third ranges,
• wherein the first and third ranges indicate height ranges that are outside a range of acceptable swashplate height, and
• wherein the second range indicates height ranges that are within the range of acceptable swashplate height;
• adjusting adjustable rod ends coupled to the first, second, and third actuator assemblies;
• and
• determining, using the verification tool, whether the swashplate lugs of the swashplate assembly are positioned according to the predetermined angle relative to the main rotor mast and at the predetermined collective height.