The Boeing Model 247D was an advanced twin-engine monoplane airliner developed by Boeing in the early 1930s. It was notable for being one of the first airliners to feature an all-metal stressed-skin design, which significantly improved aerodynamic performance and passenger comfort compared to earlier aircraft. The Model 247D could accommodate up to 10 passengers and had a cruising speed of around 188 mph (302 km/h), making it one of the fastest airliners of its time. The Model 247D featured retractable landing gear, which further reduced drag during flight, and was powered by two Pratt & Whitney Twin Wasp engines. It was used by several airlines in the United States and Canada for both passenger and mail transport services.