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一、京沪航线北京济南段开航日期,北洋航空署公布的开航日期为4月23日,这一天有否做过试飞的可能性? 1930年9月出版的国民政府交通部、铁道部编纂委员会编写的《交通史航空篇》提及:1921年4月27日,北洋政府航空署与邮政总局订立空运邮件合同。邮政总局颁布了邮件收费章程,并发行了一套航空邮票。全套航空邮票分为五种:灰绿色的0.15元,中央黑色,有飞机、长城之图案;红色的0.30元,紫色的0.45元;蓝色的0.60元;深绿色的0.90元,以上图案与0.15元的相同。航空署决定从7月1日起开航北京-济南线。在此之前,6月27日上午,该署指定大鹏号飞机进行试航,7时30分从北京南苑机场起飞,于9时59分安全到达济南张庄机场。航线全长700公里,飞行时间约2小时30分。
First, the Beijing-Shanghai route Beijing Jinan sailing date, the Northern Navigation Department announced the sailing date is April 23, the day has the possibility of a test flight? September 1930 published by the Ministry of Communications Ministry of Transportation, Ministry of Railways Codification Committee Prepared by the “history of traffic aviation” mentioned: April 27, 1921, Beiyang Government Aviation and the General Post office to enter into an airmail contract. General Post issued a fee charter and issued a set of airmail stamps. A full set of air stamps are divided into five kinds: gray-green 0.15 yuan, the central black, a plane, the Great Wall of the pattern; red 0.30 yuan, purple 0.45 yuan; blue 0.60 yuan; dark green 0.90 yuan, The same element. The aviation department decided to set sail from Beijing on July 1 - Jinan line. Prior to this, on the morning of June 27, the department designated the Dapeng aircraft for trial flights and took off from Beijing Nanyuan Airport at 0730 and arrived safely at Jinan Zhangzhuang Airport at 09:59. Route length of 700 km, flight time is about 2 hours and 30 minutes.