Got your link and checked out the drawing
Patrick. Your conning tower reminds me of Simon Lake's first military
design sub "The Protector" that was sold to Russia back in
1902.
Compare them. Pic of he Protector is at this
link http://www.chinfo.navy.mil/navpalib/cno/n87/usw/issue_16/simonlake.html
Bill Akins.
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