In 1934 the Yangcheng Kesai was built. Six were built at the same time with the same parts.
The Yangcheng Kesai was based on the O2U-1D who’s parts were in hand but not all of them to allow assembly of an identical plane. The planes have the same engine, but the fuselage, the stabilizer fin and the wings were locally made by the Chinese. The feature is that the O-2MC double-wing layout is changed to an upper-high single-wing layout. The fuselage structure is made of wood, and the cross-section is changed from rectangular to elliptical. The vertical tail and the shape of the rudder had also been modified. Initially supposed to be a monoplane, and took the air in the hand of Guo Hanting, deputy captain of the 3rd Squadron of the Air Force in 1933. He did a test flight near Tianhe Airport and, during a dive, the wing broke off due to the excessive speed and the pilot had to parachute. Later, Guangdong Aircraft Repair Factory repaired the aircraft to use as a ground testing machine.
It was after the failed test flight that the planes were converted into biplanes.
A single fix machine-gun was installed on the upper wing and the bomb rack was added making it a light bomber. The second test flight was successful, they made a trip of 480 km radius making it nearly reach his maximum range with a cruise speed of 161 km/h. The planes were not very manoeuvrable, a lot less flexible that the foreign planes. They were a bit out-dated for a 1934 plane but still showed performance as good as the average planes in services in China at that time.
The Guangdong Revolutionary Government did use them in service, as bomber and reconnaissance planes.
The fate of the six planes is unknown.
Monoplane
Powerplant: 1 × Pratt Whitney R-1340 Wasp, 425 hp
Wingspan: 10.52 m
Length: 7.46 m
Height: 3.08 m
Empty weight: 1062 kg
Max takeoff weight: 1649 kg
Power/mass: 0.13lb/hp (0.21 kW/kg)
Maximum speed: 241 km/h
Range: 978 km
Service ceiling: 5,700 m
Crew: Two
Armament: 2x .30 cal (7.62 mm) Browning machine guns
Bombload: 4x 116 lb (53 kg) or 10 30 lb (14 kg) bombs under lower wings
Engine: Pratt Whitney R-690-3 Hornet, 525 hp
Wingspan: 12.2 m
Height: 3.3 m
Length: 9.4 m
Empty weight: 1500 kg
Maximum take-off weight: 1776 kg
Max speed: 240 kph
Maximum range: 1126 km
Service ceiling: 5700 m
Weapons: Two 7.62mm Browning fixed machine guns
Bombload: four x 45kg
Crew: 2
All Aero 