Royal Flying Corps squadrons relied on vehicle-mounted equipment that could be moved from one location to another. Each squadron had twelve three-ton Leyland lorries, including four with workshops for repair and maintenance work which could be based at the airfield or go out to crashed aircraft. This workshop was equipped with power tools, a lathe, drills, and a grinder, as well as a wide selection of hand tools. Power was provided by a small Austin engine. It was mounted on a Leyland lorry.