The RTAF-5, officially designated B.ThO.5 (), is a Thai training and forward air control aircraft developed and built by the Science and Weapon Systems Development Centre of the Royal Thai Air Force in the 1980s. It was a twin-boom configuration aircraft powered by a single pusher turboprop engine, but only a single example was built.
==Development and design== In 1976, the Science and Weapon Systems Development Centre of the Royal Thai Air Force, based at Don Muang Air Base, Bangkok, started development of a trainer/forward air control aircraft, the RTAF-5. It was a single-engined high-wing monoplane of all-metal construction with twin booms, and with a fuselage resembling that of an OV-10 Bronco, but powered by a single Allison 250 turboprop engine at the rear of the fuselage. It had a retractable nosewheel undercarriage and had four underwing hardpoints, with wingtip fuel tanks.
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