This paper model is based on CSS David Class Torpedo. CSS David was built by a private venture of T. Stoney at Charleston South Carolina in 1863 and put under the control of the Confederate States Navy.
The cigar-shaped boat carried a 60- or 70-pound explosive charge on the end of aspar projecting forward from her bow.
Designed to operate very low in the water,David resembled in general a submarine; she was however strictly a surface vessel.
Operating on dark nights and using anthracite coal which burns without smoke “David” was nearly as hard to see as a true submarine.
If you ask me it looks like a syringe needle.. Comes in PDF