Fairey IIIC Two-seat reconnaissance, bomber and general-purpose seaplane, powered by a 375 hp (280 kW) Rolls-Royce Eagle V-12 piston engine; 36 built.[30] Fairey IIID Two-seat general-purpose biplane, powered by a 375 hp (280 kW) Rolls-Royce Eagle V-12 or 450 hp (336 kW) Napier Lion W-12 piston engine; 227 built.[31] Fairey IIIE Designation sometimes used for Fairey Ferret radial-engine reconnaissance and general purpose aircraft.