But duralumin, probably, a very light, strong alloy; and what I have here is a hunting knife with a can-opener on one end!
The duralumin factory is capable of meeting all Zeppelin requirements.
Are their motors made with sheet steel cylinders or with duralumin engine blocks?
The latest German airplane, the "Junker," was made entirely of duralumin.
They were through, penetrating solid crystal, masonry, steel and duralumin girders.
duralumin is four or five times as strong as aluminum and yet weighs but little more.