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VEF I-15
The VEF I-15 was a Latvian advanced trainer aircraft of the 1930s. Two examples of the I-15, a small, single-engined monoplane were built by the VEF to the designs of Kārlis Irbītis and were used by the Latvian Air Force
==Development and design==
In 1938, the Latvian aircraft designer Kārlis Irbītis, working at the Valsts Elektrotehniskā Fabrika (VEF) at Riga commenced design of a single-seat advanced trainer as a follow on to his earlier, similar VEF I-14 aircraft. The I-15 was a low-winged monoplane of all-wooden construction, powered by a single de Havilland Gipsy Six air-cooled engine, and fitted with a fixed tailwheel undercarriage.〔
In April 1939,〔Vercamer,Arvo. (VEF IRBITIS I-15 (I-15a and I-15b) ). ''latvianaviation.com''. Retrieved 13 December 2009.〕 the first prototype, the I-15a, powered by a 200 hp (149 kW) Gypsy Six I driving a two-bladed fixed-pitch wooden propeller, made its maiden flight, while a second prototype, the I-15b, was powered by a 220 hp (167 kW) Gypsy Six II engine driving a variable-pitch propeller, and armed with a single synchronised machine gun followed, this demonstrating improved performance.〔
The two I-15 prototypes were transferred to the Latvian Air Force for use as advanced trainers,〔 while a further two aircraft, to be designated I-15bis and powered by Hispano-Suiza 6 Mb engines were ordered by the Air Force, but on 17 June 1940, the Soviet Union occupied Latvia, ordering all aviation related work to be stopped.[Davis 1992, p.62.〕]
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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