The question is more precise why about these construction differences to the first sisterships originally. I red somewhere in competent navy book authors that it was given a certain freedom to shipyards enginers to modify plans of generic design to do some "visible" alterations on slip. Probably for technical reasons of available tools type in the shipyard. For French ships difference of structures are numerous on sisterships for torpedoboats early 20th and destroyers until fifties when they are numerous on slips in the same yard. Often about hull length of torpilleurs and escorteurs were of 2 yards longer for some ones.
It looks to be same for all numerous series in all navies like one identify from which shipyard the U-BOAT comes from because it has or not some minor detail on a picture. Yet, the exception would be rather to find 2 sisterships strictly same in all points until the smallest thing. Who knows if the 2800 LIBERTY SHIPS were not all different until place of some portholes and doors or some gun mounts welded some inches ahead or behind on the deck? And not to say about internal type of engines and boilers of different supplyers.
In French ships one can see large differences between admiralty basic generic plan concept for a class and the real ship when it is just launched the day of commissioning.
: I don't know about CV5 and 6, but CV8 was
: built much later and benefited from prior
: experience with her earlier sisters.
: But in regards to differences in sister
: ships built at the exact same time but in
: different yards, I believe that you'll find
: a lot of examples in British and French
: destroyers built between 1900-1939, and
: German destroyers up to 1918, where all the
: ships built in one yard differed from
: sisters built in a different yard.
: Sometimes details were small, sometimes
: large enough to readily see. Why this is, I
: don't know. Perhaps it was due to
: suggestions made by the builder and his
: staff during construction? Sometimes ships
: in a class were even distinguished from
: others in the same class by the name of the
: builder, such as German ships which were
: given numbers, with a letter prefix such as
: S13 or B97, the letter indicating what yard
: built the ship.
: --Previous Message--
: Like many of you, I can be obsessive that a
: model I buy be an accurate replica of a
: particular ship. This then leads me to a
: question.... take the WWII USN CV-5, CV-6,
: and CV-8. All members of the same class.
: Yet, there were a number of differences
: between them, especially wrt their
: superstructures. Surely the builders were
: using plans, accurate copies of which could
: be made and disseminated to the respective
: building crews. So HOW do these variations
: come to take place? I can see how members
: of a class built over a long stretch of time
: could differ (the Burkes being an example)
: because later ships could be modified to
: exploit lessons learned with earlier
: sisters. But when they're all building at
: the same time? Do builders just take
: liberty with plans? Surely not... surely
: someone has to suggest a change, have a
: reason for it, and get it approved. Does
: anyone know?
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