Naval History Forums

I read that around the year 1920 German naval architect Flamm designed a neu type of hull for big submarines. Any chance that some members may post drawings and features of some of these deign? Many thanks. Regards. Luciano.

According to "The German U-boat" his designs consisted of a three circle section, I will try to scan one image of that type of hull.

Was this type of hull similar to the designs for the electro-boot?

May be, in this case two circles are side by side near the deck and one near the bottom, what gives the hull a rough triangle section, the sides composed by the sweeps of the circles. I am reminded of scanning the image...

Regards!

I was thinking of the pre-fabricated designs for the electro-boot....

Don´t think so, the prefabrication started with the Type XXI, not before.

If I recall, prefabrication was also used by mid war with the Type VII to speed up production and to reduce vulnerable time to bombing on the building slips. It was not as extensive the pre-fab Type XXI program adopted by Otto Merker though.

Sorry, the book I mentioned above is "The U-Boat: The Evolution and Technical History of German Submarines" (Rossler), originally a German book translated to English. The author describes in detail the process of Type XXI assembly, and mentions the system was adopted for Type XXI as part of a major change in the submarine fleet (new boats and new construction techniques). All types before this were built at yards from steel plates. The change from scratch construction to parts assembly involved many changes in the design of submarines, Rossler describes them quiet good, but in short it was not possible to make parts and assemble them afterwars for a sub already designed for slip contruction.

Regards

My reply is rather late as I have only just seen this but it might be interesting to compare the Flamn design with the Dutch Dolfijn class http://www.dutchsubmarines.com/classes/ ... potvis.htm