ABC is the first aircraft is classified as a commercial aircraft with four engines were designed by Igor ski courses, flight sim out of the first test December 10 1913, and in 1914 it has test February 25, with 16 passengers and fly-back. Routes between St. Petersburg-Kiev between 21 to June 23 in the same year.The first plane is provided in a commercial airliner.Sikorsky Ilya Muro Metz was the first aircraft to be classified as commercial aircraft with four engines.were designed by Igor Sikorsky first flew on December 10
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