Brief introduction of Boeing 247

1933 is an important year in the development history of transport aircraft. On February 8, the Boeing 247 prototype of Boeing Company of the United States carried 10 passengers for the first test flight. The cruise speed of the improved Boeing 247D transport aircraft is 304 kilometers per hour and the range is 1 200 kilometers. 1 In July, the DC- 1 transport aircraft of Douglas Company of the United States made its first flight, and was later converted into DC-2, which can carry 16 passengers, with a cruising speed of 274 kilometers per hour and a range of 1900 kilometers. Boeing 247D and DC-2 mark the birth of modern transport aircraft, whose structure, performance and ride comfort have been greatly improved compared with the early radios. I received a large number of orders from airlines as soon as I came out.