Abstract: A double-pivoting deployment system for aerosurfaces, such as wings or fins, for use on aerospace vehicles. Each aerosurface has an inner segment and an outer segment. The inner segment is pivotally connected at a first axis of rotation to the support structure of the aerospace vehicle. An outer side portion of the inner segment is pivotally connected at a second axis of rotation to an inner side portion of the outer segment. In operation, the outer segment is stowed adjacent to the body of the aerospace vehicle such that the surface plane of the outer segment is longitudinally aligned with the longitudinal axis of the aerospace vehicle, and the aerosurface span is longitudinally aligned with, the longitudinal axis of the aerospace vehicle. From the stowed position, the outer segment is first rotated substantially 90.degree.