This cutaway drawing shows the PanAm Yankee Clipper (B-314), which was built by Boeing on the base of an XB-15 bomber fuselage. On December 21, 1937, Boeing delivered the first Yankee Clipper to PanAm. The Yankee Clipper was the result of over 6,000 engineering drawings, 50,000 parts, and one-million rivets. But with such complexity… Continue reading PanAm Yankee Clipper Cutaway Drawing, ca 1930s