Descriptors | Gliders, Non-powered aircraft, Aircraft, Qualification approval, Flight performance, Flight operations, Performance testing, Performance, Classification systems, Grades (quality), Stability, Working range, Velocity, Control devices, Turning, Rotational motion, Test equipment, Test specimens, Testing conditions, Safety devices, Equipment safety, Landing (flight), Inspection, Aerial photography, Instructions for use, Handbooks, Production, Records (documents), Marking |