Keywords: USS Akron construction drawings.png USS Akron ZRS-4 Cutaway and interior structural drawings circa 1931 NAVAL HISTORICAL CENTER Photo NH 80769 http //www history navy mil/photos/ac-usn22/z-types/zrs4-v htm ca 1931 USN Caption read Photo NH 80769 Drawings of USS Akron circa 1931 PD-USGov-Military-Navy USS Akron ZRS-4 Cutaway diagrams of aircraft |