consumption levels than hybrids since no energy is needed to generate lift, only to power the craft forward. Notes References Dooley, Sean C., The Development of Material-Adapted Structural Form - Part II: Appendices. THÈSE NO 2986 (2004), École Polytechnique Fédérale de Lausanne Von A. Kosmodemyansky, X. Danko. 2000. Konstantin Tsiolkovsky His Life and Work: His Life and Work The Minerva Group, Inc., https://www.varialift.com Airship configurations Konstantin Tsiolkovsky