Proposed type with external helium chambers and internal hydrogen chambers.
New type of rigid airship
Article (Journal)
METALCLAD RIGID AIRSHIP DEVELOPMENT1
SAE | 1926
|NTIS | 1972
|Metalclad rigid airship development
Engineering Index Backfile | 1926
|The Italian "N" type semi-rigid airship
Engineering Index Backfile | 1924
Emerald Group Publishing | 1931