Abstract: A thrust generator comprising: a motor (17), and a wing mounting (10), comprising a base (11) and a wing (2, 20), the base connected to the motor and configured to rotate the wing mounting about a stroke axis (13) within an angular stroke range, wherein the wing comprises a wing panel (24) having a first longitudinal edge (5) and a second longitudinal edge (6), the wing panel defining a wing surface (4) between the first and second longitudinal edges, and wherein the wing panel is configurable between: a first configuration in which the first longitudinal edge of the wing panel defines a leading edge and the second longitudinal edge of the wing panel defines a trailing edge; and a second configuration in which the second longitudinal edge of the wing panel defines a leading edge and the first longitudinal edge of the wing panel defines a trailing edge, the thrust generator being configured to rotate the wing mounting about the stroke axis in a first direction when the wing panel is in the first configuration

Abstract: A wing mounting, comprising: ?a base (11); ?a wing bracket (25) pivotally mounted to the base, configured to rotate relative to the base within an operational angular range; and ?at least one biasing element configured to bias the wing bracket away from the boundaries of the operational angular range, wherein the at least one biasing element (120) is configured to bias the wing bracket within a biasing range adjacent the respective boundaries of the operational angular range, but substantially not to bias the wing bracket within an inner angular range including the middle of the operational angular range.