Boeing 247
| Boeing 247 | |
|---|---|
| United Air Lines Boeing 247D in flight | |
| General information | |
| Type | Passenger airliner | 
| National origin | United States | 
| Manufacturer | Boeing | 
| Status | Retired | 
| Primary user | Boeing Air Transport | 
| Number built | 75 | 
| History | |
| Introduction date | May 22, 1933 | 
| First flight | February 8, 1933 | 
The Boeing Model 247 is an early American airliner, and one of the first such aircraft to incorporate advances such as all-metal (anodized aluminum) semimonocoque construction, a fully cantilevered wing, and retractable landing gear. Other advanced features included control surface trim tabs, an autopilot and de-icing boots for the wings and tailplane. The 247 first flew on February 8, 1933, and entered service later that year.