Abstract: An aircraft can include an aircraft body. The aircraft can include a wing, which can include a first wing tip and a second wing tip. The first wing tip and the second wing tip can be located on wing on opposite sides of the aircraft body. A camera can be located on the wing. The camera can have a field of view. The field of view including a portion of the flight environment and a portion of the aircraft body. The fields of view can be less than 180 degrees. The aircraft can include a calibration target. The calibration target can be located in the field of view. In some arrangements, the camera can be part of a stereoscopic camera system.

Abstract: A rotor includes a rotor axis, two elongate blades, a hub on the rotor axis, and a rotational drive system on the rotor axis. The hub supports the blades for pivotation relative thereto, including folding one blade over the hub between radial opposition with the other blade about the rotor axis and alongside the other blade. The rotational drive system supports the blades on the hub for rotation about the rotor axis, and supports the blades on the hub for teetering.

Abstract: An aerial vehicle includes a body defining a stowage compartment, and a flight module supported by the body in the stowage compartment. The flight module includes rotors operable to generate aerodynamic force, and is reconfigurable between a stowage configuration and a flight configuration. In the stowage configuration, the flight module is housed by the stowage compartment, with each rotor tucked inboard the body in a stowage position. In the flight configuration, each rotor is perched outboard the body with a skyward-facing orientation in a flight position. Aerodynamic force generated by the rotors is thereby usable for flying through the air.

Abstract: A flight module includes a rotor and a rotor carrier. The rotor carrier includes an elongate, upstanding carriage rail, a carriage supported for movement along the carriage rail, an elongate rotor arm carrying the rotor and supported atop the carriage rail for pivotation, and an elongate strut pivotally mounted between the carriage and the rotor arm. The pivotation includes pivotation between alongside the carriage rail, where the rotor arm retentively carries the rotor in a stowage position, and overhanging the carriage rail, where the rotor arm retentively carries the rotor with a skyward-facing orientation in a flight position. With movement of the carriage along the carriage rail, the strut transfers loading between the carriage and the rotor arm for pivoting the rotor arm between alongside the carriage rail and overhanging the carriage rail, and thereby carrying the rotor on the rotor arm between its stowage position and its flight position.

Abstract: A control for a turbine engine using electrical machines monitors engine health and allocates power extraction between the electrical machines.

Abstract: A control for a turbine engine using electrical machines monitors engine health and allocates power extraction between the electrical machines.