alt Hacker NewsAnyone interested should read Joe Sutter's book, 747. Sutter was the lead engineer for the development of the 747 and he has some awesome stories.
One interesting story is that Juan Trippe (CEO of PanAm) wanted Boeing to create a double-decker airplane. He was enamored with the idea of "ocean liners" cruising the sky. But Sutter (and other engineers) knew that it would be impossible to create what he wanted, so instead they proposed a wide-body aircraft (10 seats across). Nevertheless, Trippe insisted on a double-decker design.
The engineers then created two cabin mockups. One for a double decker, which was basically two narrow-body cabins stacked on top of each other. The other was the wide-body of the 747. Once Trippe saw the trade off, he realized that the spacious cabin of the 747 was the way to go.
But even then, when he saw the second level where the pilots go, he insisted on putting passengers up there too.
I've had the good fortune to fly on the top deck of the 747. I highly recommend it.
One thing I remember from his book is that the 747 was initially of secondary importance within Boeing, behind the SST. This wasn't Boeing's flagship, so to speak, until SST was canceled.