In July 1913, the Brit AV. Roe (Avro) Corp. Tested its first model 504 aircraft, and many variants followed — based on the kind of engine installed. The 504K version had adapters, which authorized the installation of many differing kinds of rotary engines. This aircraft had an ordinary combat career, but it proved to be a superb tutor and after America entered in the World War I, it took many months to build the coaching facilities required by the U.S.
Armed forces Air Service. In the meantime, many American student pilots went abroad for flight training and those were sent to Great Britain learned the Avro 504K tutor before advancing the fight aircraft. Continue reading