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Chantilly VA - Steven F. Udvar-Hazy Center - Pan American World Airways - Boeing 307 Stratoliner Clipper Flying Cloud (NC19903) 01 | by Daniel Mennerich
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Chantilly VA - Steven F. Udvar-Hazy Center - Pan American World Airways - Boeing 307 Stratoliner Clipper Flying Cloud (NC19903) 01

The Boeing Model 307 Stratoliner was the first commercial transport aircraft with a pressurized cabin. This feature allowed the plane to cruise at an altitude of 20,000 ft (6,000 m), well above weather disturbances. The pressure differential was 2.5 psi (17 kPa), so at 14,700 ft (4,480 m) the cabin altitude was 8,000 ft (2,440 m). The Model 307 had capacity for a crew of five and 33 passengers. The cabin was nearly 12 ft (3.6 m) across. It was the first land-based aircraft to include a flight engineer as a crew member (several flying boats had included a flight engineer position earlier)

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Taken on October 21, 2011