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Thread: Destroyers - Fletcher Class

  1. #3571
    Patron bbvet's Avatar
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    BM9 Wrote:
    Thanks for chiming in bbvet! It does clarify the the bilge blocks, however it raises another question, does the print mention the keel blocks? Or perhaps they were fleeted or removed say for example every third one removed and then the next dd they would shift to another third and so on. Or does the print a different docking position entirely?
    Here is another clip from the same drawing that shows the description of the three block positions and this is typical for all sets of blocks thruout the drawing:
    Name:  Docking Position_1.JPG
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    Somewhere recently I've read that the three positions allowed for a complete painting of the hull but obviously not during the same drydock period.

    Here is the Position #1 Table of Offsets for Side Blocks & Bilge Keel (there are 3 of these tables):
    Name:  Dock Position 1 Table of Offsets.JPG
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    These show the blocks at 12' intervals. There are also 3 tables for the blocks at 8' intervals and a table showing the hull openings below the DWL.

    I would love to attach the entire drawing, but it is LARGE!!!

    Hank
    Last edited by bbvet; 20 Jun 18, at 14:12.

  2. #3572
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    Quote Originally Posted by bbvet View Post
    BM9 Wrote:


    Here is another clip from the same drawing that shows the description of the three block positions and this is typical for all sets of blocks thruout the drawing:
    Name:  Docking Position_1.JPG
Views: 38
Size:  150.7 KB
    Somewhere recently I've read that the three positions allowed for a complete painting of the hull but obviously not during the same drydock period.

    Here is the Position #1 Table of Offsets for Side Blocks & Bilge Keel (there are 3 of these tables):
    Name:  Dock Position 1 Table of Offsets.JPG
Views: 38
Size:  66.6 KB
    These show the blocks at 12' intervals. There are also 3 tables for the blocks at 8' intervals and a table showing the hull openings below the DWL.

    I would love to attach the entire drawing, but it is LARGE!!!

    Hank
    Thank you for this it is great info and answers the question, They set the ship down in a different position each time they dry dock it. Thanks again!

  3. #3573
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    Quote Originally Posted by blidgepump View Post
    A look down into the Underwater sound room.. I think this is at Frame 26?
    Thank you bilgepump, I have a booklet of general plans for the Kidd from the 1950s and I attached 2 photos of the 2 levels of the sonar space. The computer and other equipment are on the third platform and the unit itself is in the hold. It appears that they installed a dogged hatch with a Top Hat, perhaps over the unit itself and was used to service it as moving around the hold area would not be very easy/ to confined....this would be a guess on my part but makes sense. In center photo you see a vent pipe with a valve on it. I imagine/not sure that valve remains closed until someone needs to enter the space at which time they open it to allow fresh air to circulate. I also imagine during GQ someone would have to come down there, to insure that valve is closed, as it has direct access to ships vent system.
    Does anyone have a photo or info on the unit itself? It would be interesting to know the reason for the Top Hat. my guess there is a rod or something skinny and tall on top of the unit..again a guess.Name:  IMG_6855.jpg
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  4. #3574
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    Quote Originally Posted by blidgepump View Post
    The B & W photo illustrates well the cribbing used to rest the hull of a Fletcher DD. Thank you for posting this photo.
    The Kidd @ Baton Rouge is on my punch list to revisit and work my way under the hull to inspect the sea chest and scoops.

    Also a mention of the sonar in the previous post made me search for a couple of pictures... i.e. the sonar dome and the hatch to access the under water sound room, located A-4041/2 -C.
    bilgepump the images of the Kid on her cradle is fantastic...it shows the turn of the bilge where the hull forms to a vertical position, they show the bilge keel which is that length of steel kinda like a step on the hull that is attached to the hull right at the turn of the bilge and goes aft toward the propeller at a downward angle. This is one is on the Starboard side and there is one identical to this on the Port side. Note; the intent of the bilge keel is to improve the stability by arresting the ships roll as she made way through the ocean, these ships could heel over quite far before they righted themselves especially in confused sea or in storms.

    The caps/blanks with eyes on them are the hard blanks that I was referring to in a previous post. Bilgepumps's photos show the actual style blanks the navy required to seal the hulls of all inactive ships! Some were pretty large as shown in the second image the square hat which I believe os the #1 main condenser overboard. Any way it was quite a process to fabricate install and identify these things...the docking plan was very useful! I bet if one asks the Kidd curators they might find a docking plan that identifies the things in there files or the 6 part folder.

    An interesting point...in the days before cathodic protection when these ships were originally layed up the navy had a program where they would DD these ships periodically not sure but I beleave every 5 yrs of so. The hulls were cleaned and the systems tested. Since they had to remove the blanks to test the systems they attached rope or change to the eyes of the cap and the eyes on the hull so when the cap/blank was washed (burned) off the hull the cap would remain where it belonged so that it was easier to weld back up. Now this info read about and heard stories from older Philadelphia Shipyard workers, however it makes sense to tie up the caps. The Navy did go to great expense in those days to maintain ships that were "mothballed" (layed up) especially the ones that were in good condition. When I was stationed there the reserve fleet had cathodic protection, dd was considered an unnecessary expense Any way I digress.

    In that same image looking back by the propeller one will find the Strut the tail shaft/the tapered propeller shaft, goes through the strut bearing which is actually lined with wood ..lignum vitae. Not visible in the photo is a second smaller strut closer to the stern tube/where the tail shaft penetrates the hull. This wood was cut into staves and is installed in the bearing housings the strut bearings, are slid into the strut housings, and the shaft slid through the bearing. Lignum Vitae was a very dense wood that performed very well immersed in salt water. Believe it or not the lubrication for all these bearings is water. The the tail shaft journals were sleeved with a phosphor bronze sleeve I believe to retard/prevent corrosion and the shaft painted. Because of the war shortages perhaps the first shaft sleeves were steel however I am not sure of that. I do know that copper is way to soft and stainless or crescent was not really available during the war. In any case most ships got phosphor bronze in later years. Today Lignum Vietae is no longer used a special process rubber and special nylon staves are substituted.

    attached is the stern section of the outboard profile of the Kidd which clearly shows the the 2 struts and the tail shaft and propeller that pointy cap in the propeller is called a Dunce Cap. I does anyone have a drawing or an image of the stern tube castings on the fletcher. I will go out on a limb here and say that the gearings and sumner had the same arrangement since they have the same propulsion plant and are the same relative shp. My curiosity is getting the better of me.
    Name:  IMG_6857.jpg
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    Last edited by Boilermaker9; 20 Jun 18, at 21:45.

  5. #3575
    Senior Contributor blidgepump's Avatar
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    Color pictures....

    [QUOTE=Boilermaker9;1042521]bilgepump the images of the Kid on her cradle is fantastic...it shows the turn of the bilge where the hull forms to a vertical position, they show the bilge keel which is that length of steel kinda like a step on the hull that is attached to the hull right at the turn of the bilge and goes aft toward the propeller at a downward angle.

    That blueprint of a Fletcher stern compliments the two attached pictures from the USS KIDD.
    The year that I visited the DD, the Mississippi River was staging high that Fall.
    Thus, the soft mud made a close inspection of the hull challenging.
    Attached Images Attached Images   

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