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The Baribatra ((タイ語:บริพัตร), also spelled Boripatra or Boriphat) or Bomber Type 2 was a two-seater light bomber aircraft of the 1920s designed and built by the Royal Siamese Air Force's Aeronautical Workshops. A small number were built for the Thai Air Force, with the type being the first Thai-designed aircraft. ==Design and development== 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 1927, the price of Renault engines was raised by the supplier, and it was decided to investigate fitting the Breguets with alternative engines. 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.〔Young 1982, p. 78.〕 Design of the new aircraft, designated Bomber Type 2, was assigned to Major Luang Vejayanrangsrit, the assistant director of the Aeronautical Workshops, and later commander of the Royal Siamese Air Force.〔 The Bomber Type Two was a conventional single-bay biplane of mixed construction, with a steel-tube fuselage structure. The forward fuselage was covered by metal panels and the rear fuselage fabric covering, while the wings had a fabric covered wooden structure (using local wood). 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.〔 Shortly after the first flight, the aircraft was named ''Boripatra'' (pronounced Boripat) by King Prajadhipok after his half brother, Prince Paribatra Sukhumbhand, the then Minister of Defence.〔Young 1982, p. 79.〕 A second Boripatra flew later that year, with the Jupiter replaced by a 660 hp (492 kW) BMW VI V12 engine. Boripatras were also flown with Curtiss D-12 engines and possibly a Pratt & Whitney Wasp. While the Boripatra had superior performance to the Breguet 14, it did not replace the older aircraft, as the price of Renault engines dropped to its earlier level, allowing the Breguets to continue to be supported.〔 Less than twelve Boripatras were built.〔Young 1982, p. 80.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Boripatra」の詳細全文を読む スポンサード リンク
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