Lift fan position lock mechanism

A rotor lock mechanism, comprising:

• a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;
• for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent;
• and
• a rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;
• wherein the mechanical stop structure comprises a substantially cylindrical element extending beyond a plane associated with the magnet comprising the rotating magnet assembly.

A rotor lock mechanism, comprising:

• a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;
• for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent;
• and
• a rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;
• and
• further comprising an insert set into said detent, the insert being made of a first material that is harder that a second material of which the ring structure is made.

A rotor lock mechanism, comprising:

• a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;
• for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent;
• and
• a rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;
• wherein the rotating magnet assembly is configured to be attached fixedly to a rotor via a base structure with respect to which at least a portion of the rotating magnet assembly that includes the magnet and the mechanical stop structure is connected via a pin or other axially oriented structure in a manner such that at least said portion remains free to rotate about an axis associated with the pin or other axially oriented structure.