Thanks for your reply, I had a look at those blueprints and although they make a nice framed decoration that are not detailed enough for a good model.
Unfortunately from bitter experience I have found that finding really good plans is not that easy, especially if the subject is a little unusual like the Barracuda.
Just had the opportunity to examine a really top quality set of plans of the German WW1 U-139. Drawn by Peter Gunter Huff and available from Christian Schmidt in Germany. From these you could produce a magnificent model.http://www.christian-schmidt.com/produc ... anguage=en