I've searched the sub, and no results came up for the "Davenport Dynapod". In 1971, Arthur Clyde Davennport filed a patent in Britain, titled "Articulated vessels". The patent specifically describes a sealed chamber that could function as an airship gas bag, constructed from pyramidal components, joined by sealed hinges. In 1974, Davenport presented the Variable Density Aircraft Concept at the Interagency Workshop on Lighter than Air Vehicles, held in California. This workshop was an interage...