The standard bomber aircraft of the Royal Siamese Air Service in the 1920s was the Breguet 14, which was license-built by the Air Service's Aeronautical Workshops as the Bomber Type 1 at Don Muang, powered by surplus 300 hp (224 kW) Renault engines purchased from France.

In order to investigate the characteristics of possible engines, it was decided to build a test bed aircraft, which might also act as a replacement for the Breguet.

[1] The Bomber Type Two was a conventional single-bay biplane of mixed construction, with a steel-tube fuselage structure.

The construction of the first prototype, powered by a 450 hp (336 kW) Bristol Jupiter radial engine, began on April 5, 1927, with it making its maiden flight on June 23, 1927.

[1] Shortly after the first flight, the aircraft was named Boripatra (pronounced Boripat) by King Prajadhipok after his half brother, Prince Paribatra Sukhumbandhu, the then Minister of Defence.