图片文件尺寸: 9000×6652 px
邮机,皮特凯恩PA-5邮机联队-国家航空航天博物馆
-The Pitcairn PA-5 Mailwing was designed to carry air mail along the routes of the eastern United States. Efficient and economical, it helped build the route structure for what would ultimately become Eastern Air Lines.
Pitcairn PA-5 Mailwing (Photo), by National Air and Space Museum