Aardvark diagram and details.
This design was based off of early birds of pray, such as the 6 to 9ft birds that would roam the savanna's of old. Though looking at it from today's point of view you could consider it more ostridge like or even swan. This is a diagram of a submersible commercial ship, comparable to a 737 airplane.
Lithodes diagram, based of studies from rock crabs and lobsters.
Swordfish diagram and details of inner hull and loading mechanics. This was also a study for the painting.
Complete workings and cross-section of the Swordfish. This was to give complete understanding of how it functioned and was assembled.