The SSZ was built at the Royal Naval Air Service (RNAS) airship station at Capel-le-Ferne[REF] near Folkestone to the design of three officers that were serving there[REF] as a successor to the SS class [REF].
A single water-cooled Rolls-Royce Hawk engine was mounted on bearers above the level of the rear of the car, and drove a diameter four-bladed propeller in pusher configuration [REF].