Internal keel walking way.
Box rudders and elevators.
Three cars, foremost for control only.
Four wing propellers.

Stage 3.
Shorter parallel portion of hull framework, bluff nose and
tapering tail.
Internal keel walking way.
Balanced monoplane rudders and elevators.
Three cars, foremost for control only.
Two foremost cars close together and connected by
a canvas joint to look like one car.
Four engines and four propellers. One engine in forward
car driving pusher propeller. Three engines in after
car driving two wing and one pusher propeller.


To the second stage belongs naval airship L 2, which was
destroyed by fire a month after completion in 1913. In 1916 a
fourth stage made its appearance, of which the first ship was L
30, completed in May, and to which the ill-fated L 33 belonged.
This type is known as the super-Zeppelin, and has been developed
through various stage until L 70, the latest product before the
armistice. In this stage the following are its main features:

Stage 4.
Short parallel portion of hull, long rounded bow and
long tapering stern. In all respects a good
streamline shape.