Some Boeing aircraft never made it beyond the drawing board. But, their sleek lines inspired generations. In fact, some old designs still look futuristic today.

During World War II, Boeing’s factories produced a staggering number of aircraft, ranging from B-17 Flying Fortress bombers to P-51 Mustang fighters. Thousands of men and women on the homefront kept the assembly lines humming day and night.

Not all products built in Boeing’s factories have flown through the air. In addition to planes, the company has also made boats, trains, and many more items.

Back in the days when most people still traveled by ocean liner or train, the public had to be convinced that air travel was safe, enjoyable and glamorous. For decades, Boeing and Douglas promoted products such as the Stratocruiser, DC-6 and 707 with ads in various business, consumer and travel magazines.