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[[image - drawing of a propeller driven lighter than air balloon with a passenger cabin attached to the bottom. text: Tip to butt 160 ft. Diameter 80 ft.  Capacity 804,249.6 cu. Ft. Cabin cross section 9 x 9 = 1012.5 sq. ft.]]

[[underlined]] Second form, June 30, 1881. [[/underlined]] 

[[image - drawing of Frame for supporting cabin]]
Frame for supporting cabin.
Dotted lines represent wires. Full lines represent more rigid supports.
Head pressure at 50 miles per hour 63,834.5 pounds