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Topic review - Calling all USS Iowa class (BB-61) fans
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  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I've been doing deck plans for the NJ where the desired accuracy is down to 1/16". Unfortunately, this is the best quality I can share here. I am doing them in the ship's final configuration; before handicap and tourist access doors were cut and the 25mm guns were added. The result is quite different from the dreaded Shopping Mall Map Booklet of General Plans.

I've been on my knees with a tape measure quite a bit recently and found that the 80's plans were often just suggestions construction crew.

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Post Posted: Mon Apr 22, 2019 9:04 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
chuck wrote:
Which are strakes O and P?


They are the top two strakes, the ones with butt plates on the outside of the hull.
Post Posted: Mon Apr 01, 2019 2:24 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Which are strakes O and P?
Post Posted: Mon Apr 01, 2019 9:22 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Yes, nearly all the shell plating (and nearly everything else) is riveted. There are some places in the shell that are welded. However, it looks like they did it only where riveting would be impracticable.

The bottom of the end of the twin keel is welded. The plates at the bow around the shell bolster for the hawse pipe are weld. The plans show a lot of welds between the plates of strakes. The plates of the P and O strakes are all welded in together in the plans but there are riveted butt straps on the ship.

Here's a detail (allI can upload on this server). This is at the base of the tunnel, frame 188-1/2 to 189. The tunnel is coming to an end so things are getting smaller. Forward, the bottom plate is held to the side plate with an angled bracket with rivets. Then the bottom becomes an bent plate that forward is riveted to the angle and aft is welded to the plate above.

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Post Posted: Sun Mar 31, 2019 6:15 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I believe much of the shell plating were riveted in the 4 completed ships . The rivet heads are flush with the shell plating and difficult to make out under most lighting, but many can easily be made out under strongly oblique lighting.

An example is https://1drv.ms/u/s!AietPwAuPc0SjDD2HqFksWcz45b9
Post Posted: Sun Mar 31, 2019 12:22 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I believe much of the shell plating was welded? Certainly close examination of the above waterline shell suggests this with the notable exception of vertical butt straps on the 60# plate (By way of the citadel) which are riveted. Kentucky and Illinois were to have a higher degree of welding.
Post Posted: Sat Mar 30, 2019 8:18 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
It seems to me if the knuckles exactly align with strake edge, then that would complicate riveting because the two rows of rivets would be at a slight angle to eachother. It would be easier to fabricate to put the crease for the knuckle on the interior of a plate.
Post Posted: Sat Mar 30, 2019 1:09 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
One always wonders if this was due to design or happenstance? Certainly the design was well along when it was discovered that Bu Or designed a turret and rotating assembly over a foot larger than Bu C&R had allowed in their hull design. Certainly a plate formed with a knuckle has more longitudinal stiffness than one without. Perhaps it was advantageous to not knuckle them at the joint?
Post Posted: Fri Mar 29, 2019 3:37 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
The butt straps joining the 60# plate in way of the citadel and above the WL was not in my understanding joined at frames. Yes the knuckles are shown in various drawings and would be I suspect a feature to speed production, requiring less compound rolling of the shell plating. a time consuming process requiring some expertise. Such detail design was often done by the lead production yard with mind to ease, materials and speed of completion.


Interestingly, the knuckles do not match the strake edges. In most places the edges are roughly parallel but offset (by as much as a foot). In others, the strakes go across the knuckles.
Post Posted: Fri Mar 29, 2019 10:21 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
The butt straps joining the 60# plate in way of the citadel and above the WL was not in my understanding joined at frames. Yes the knuckles are shown in various drawings and would be I suspect a feature to speed production, requiring less compound rolling of the shell plating. a time consuming process requiring some expertise. Such detail design was often done by the lead production yard with mind to ease, materials and speed of completion.
Post Posted: Mon Mar 25, 2019 5:02 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I noticed the knuckles on drawings, and looked carefully on the New Jersey, Wisconsin and Iowa for them. I think for all practical purposes the knuckles are too subtle to be noticed on the real ship.
Post Posted: Sun Mar 24, 2019 7:23 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
Under the general heading of "Wild Ass Guess" with no corroborating evidence (no longer a modern requirement) would be that for structural reasons the butts of side plates were alternated such that they weren't aligned at the same frames?


And the strake ends appear to generally be off a frame, typically either 21" or 12". My guess at this point is the reason is to allow butt plates to be inserted.

Let me throw out another detail that is not apparent from must plan sets or hull lines shown in the books.

There are a lot of linear sections in the hull. From frame 55 to Frame 171 the sides are straight (but at various angles. After Frame 171 the upper part of the frame starts forming knuckles. For illustration, this is Frame 188. There is a distinct knuckle at each segment.

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Post Posted: Sun Mar 24, 2019 3:04 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Under the general heading of "Wild Ass Guess" with no corroborating evidence (no longer a modern requirement) would be that for structural reasons the butts of side plates were alternated such that they weren't aligned at the same frames?
Post Posted: Sun Mar 24, 2019 12:54 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
chuck wrote:
Where did you get the strake diagrams?


I have to assemble that from a lot of data collected from different places. The mold loft data is frequently unreadable. 3s look like 5's. 6's look like 0s. So I have to do trial and error with data points. I have to debug the points.

Then I have to compare with other plans I have collected.

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From that I generated the diagram shown. I have not finished the entire hull.
Post Posted: Tue Mar 19, 2019 9:41 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Where did you get the strake diagrams?
Post Posted: Mon Mar 18, 2019 11:09 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
In what way is the plating asymmetric? Below or above the WL, for or aft etc? I noticed on Missouri that a different plating was "added" when the booms for the Jacob's ladders were removed. As Chuck pointed out, the internal arrangement is not symmetrical, though the depth of the side protective scheme would tend to reduce such necessity.


So far I have found that the C strake (below the waterline) is different P/S. The difference does not appear to be the result of an opening.

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Post Posted: Mon Mar 18, 2019 5:57 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
Unfortunately it's a matter of removing materials. Does this paint make my Battleship's ass look fat? Some can be added at the bow, but the stern requires major liposuction.


Yeah, and it’s not worth the aggravation. Now if someone were to make a 3D printed drop in place lower stern, that just involved cutting away the molded plastic at the waterline and just behind the #3 turret, and dropping in a new lower stern, then were on to something....
Post Posted: Mon Mar 18, 2019 5:20 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Unfortunately it's a matter of removing materials. Does this paint make my Battleship's ass look fat? Some can be added at the bow, but the stern requires major liposuction.
Post Posted: Mon Mar 18, 2019 4:37 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Having just compared the hull stern area below the waterline of the MENG Missouri to the Trumpeter & Tamiya models, I see now where people are saying the hull is off. Unfortunately my build is to far along to correct, and I wouldn’t attempt surgery anyways. I still think it’s close enough where most folks won’t be noticing.

It would be nice though if someone were to create some 3D printed “drop in place parts” to be glued onto the hull to create a more correct shape.
Post Posted: Mon Mar 18, 2019 1:20 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
In what way is the plating asymmetric? Below or above the WL, for or aft etc? I noticed on Missouri that a different plating was "added" when the booms for the Jacob's ladders were removed. As Chuck pointed out, the internal arrangement is not symmetrical, though the depth of the side protective scheme would tend to reduce such necessity.
Post Posted: Sun Mar 17, 2019 11:37 am

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