Three prototype Guan single-seat high-altitude fighters were ordered at the beginning of 1925 primarily to test the application of turbo-supercharged engines to fighters.
Of mixed construction, with metal fuselage, wooden wings and fabric skinning, and provision for the standard twin synchronised 7.7mm Vickers gun armament, the first prototype was completed in June 1926, with a geared 450hp Napier Lion IV with an exhaust-driven turbo-supercharger below the propeller shaft. The second prototype followed early in 1927 with a direct drive 525hp Lion VI and turbo-supercharger mounted above the propeller shaft. Difficulties with the turbosuperchargers led to cancellation of the third prototype and abandonment of the development programme.
Take-off weight: 1725 kg / 3803 lb
Empty weight: 1348 kg / 2972 lb
Wingspan: 9.70 m / 31 ft 10 in
Length: 6.70 m / 21 ft 12 in
Height: 3.10 m / 10 ft 2 in
Wing area: 27.68 sq.m / 297.94 sq ft
Max. speed: 282 km/h / 175 mph