This is a superb set of STL files for the Russian Akula II attack submarine, rendered in 1/72 scale. At 60" in overall length, this will build into an impressive boat with tons of room for operational features. 

Parts are cut to a maximum z-axis print height of 250mm. Files for the entire upper and lower hull in complete pieces are also included if you want to slice it for printing in another scale. 
 
Hull thickness in 1/72 scale: 4mm
Length in 1/72 scale: 1527mm
Beam in 1/72 scale: 193mm
Maximum width at stern: 273mm

Periscope and external antenna parts are included in the file set. No propeller is included.