Cruising radius at 50 M.P.H. 10,580 miles without refueling, 8 engines, 4,480 horsepower, use of non-inflammable helium allows location of motors inside ship's hull. Provision made for storage within hull of 5 airplanes, storage compartment being 75 feet long and 60 ft. wide. Safety Factors, - triple layer hull of great structural strength, 12 separate gas cells, all parts accessible while in flight. Ship can be adapted to carry 100 passengers. Radio cabin and commanding officer's quarters are directly over the control car. Akron Comparative Facts Zeppelin. 6,500,000 gas Volume, Cu. Ft. 3,700,000. 785 Length Overall, ft. 776. 132.9 Maximum Diameter, Ft. 100. 146.5 Height Overall, Ft. 113. 84 Maximum Speed, M.P.H. 80.