“彗星”之谜 1949年7月27日,英国首先试飞成功第一代喷气式民航客机“彗星”号。不过,在1953年5月2日至1954年4月8日之间,投入使用的“彗星”飞机接连发生飞行事故。其中一架在印度加尔各答起飞后坠毁;另外两架在地中海上空飞行时神秘失踪,当时被称为“彗星”之谜。后来经调查发现:喷气式客机的密封机舱在飞行高度变化时,不断地受到增压和减压,而产生金属材料疲劳效应,最终导致空中解体。在此期间之内,苏联研制的第一代喷气式客机图-104型于1956年9月15日抢先投入航班。随后,美国的波音707、道格拉斯DC-8和法国 “Comet” mystery July 27, 1949, the United Kingdom first test flight success of the first generation of jet airliner “Comet”. However, flying “Comet” airplanes put into operation between May 2, 1953 and April 8, 1954 occurred in succession. One of them crashed after take-off in Kolkata, India; the other two were mysteriously missing when flying over the Mediterranean Sea, then known as the “Comet” mystery. Later, it was discovered through investigation that the sealed cabin of a jet airliner was continuously pressurized and depressurized when the flight altitude changed, resulting in the fatigue effect of metal materials, which finally led to the airborne disintegration. During this period, the first generation passenger jet developed by the Soviet Union, Figure -104, was first put into service on September 15, 1956. Subsequently, the United States Boeing 707, Douglas DC-8 and France