Boeing 307 Stratoliner
Airliner
The Boeing Model 307 Stratoliner is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered commercial service in July 1940. Wikipedia
First flight: December 31, 1938
Range: 2,390 mi
Top speed: 222 mph
Length: 74′
Manufacturer: Boeing Co
Engine type: Wright R-1820 Cyclone
Unit cost: 315,000–315,000 USD (1937)