Because Boeing's engineers had experience in production-oriented bomber building (Ford gave them that at Willow Run, where they were building a completed B-24 e

Because Boeing's engineers had experience in production-oriented bomber building (Ford gave them that at Willow Run, where they were building a completed B-24 each hour¹), they knew not to gold-plate their design. Create the minimum that will do the mission, and make it easy to service & repair. ¹ http://www.strategosinc.com/willow_run.htm http://www.strategosinc.com/willow_run.htm