The Pup was designed as a single-engined all-metal two-seat aerobatic aircraft or a four-seat touring aircraft. The Pup was more spacious than its direct competitors and was more of a "pilot's aeroplane"; it was a more complex design to manufacture and was also corrosion proofed throughout (usually then only an option on US-built competitors). For these reasons it was correspondingly more expensive to build, yet was sold at a competitive price. Its maintenance requires more care (i.e. expense) and its early days were troubled by issues with the doors and spares availability. Beagle Aircraft Ltd chose to build the Pup following a market survey which demonstrated a global requirement for a modern, all-metal 2–4 seat training/touring aircraft to replace aging Tiger Moths and Pipers used by flying clubs. American manufacturers were already fulfilling this demand with the Cessna 150 and 172 and the Piper Cherokee. Variants. Pup Series 1 (Pup 100) Powered by a 100 hp (75 kW) Rolls-Royce Continental O-200A engine Pup Series 2 (Pup 150) Powered by a 150 hp (110 kW) Lycoming O-320-A2B engine Pup Series 3 (Pup 160) Powered by a 160 hp (120 kW) Lycoming O-320-D2C engine Bulldog (Click here for separate profile) Military training version, 2 prototypes only built by Beagle