Well. If anyone wants to PM me with their email address I will send you what I have been freely given. But I am a newb at this. There is no way I can manufacture multiple hulls. I have these plans, the 144th scale Revell kit and Steve Neill's "RC Submarines for Dumb Asses". With this I am pretty sure I can make one Type XXI in 72nd scale. But I don't know how long it will take me. I am working on Jules Vernes' NAUTILUS this week. I will going plank-on-frame or thereabouts with her. I will save the lost foam method for the U-boat's more complex hull.
BTW, does anyone remember who built that +10-foot long XXI I saw in the SCR years ago when I first joined???
I'm doing a 3D solid model. Normally I work the the table of offsets for the shape. The book gives dimensions but few measurements for shapes. While this may sound anal, if you're not really precise you get ripples. There's no sandpaper in the computer.
Cross sections are my main need (Hull and conning tower). If worst comes to worst I might be able to go to staples and get scans done. I've done that for sheets many times before but but I don't know how well they do with books.
I have this I can scan and make into PDF, just don't know how that comes off copyright wise?? Won't cost anything to do so don't want any money to do that. Failing that German ebay search for Planmappe Uboottyp XXI, (U-Boot-Typ Modellbau-Pläne, Planblätter) -NEU- and that is for a full set of Fritz Khol drawings