Airbattleships 1912
Hydrogen is 16 times lighter than air. Let's imagine what would be possible when it will be 1600 times lighter... (except, of course, that the atmosphere would explode or something like this ;) )
SMS "Ostfriesland" during reconstruction to Kaiser Karl Der Grosse-class airbattleship. Spring 1911.
Airbattleship Kaiser Karl Der Grosse-class.
Airbattleship Lothringen-class over London, summer 1915.
first sketch