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Topic review - Calling all USS Iowa BB-61 class fans
Author Message
  Post subject:  Trivia  Reply with quote
The hatches on 16-inch turrets 1 and 3 swing down and towards the front face of the turret.
The hatches on turret 2 swing to the rear of the turret.
Post Posted: Fri Apr 03, 2020 1:35 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
I have not found any photographs of the Iowa class propeller shafts. Here is one of CV-67. It is very similar to that of the Iowa class. One difference is that the Iowa class has 14 bolt hole compared to 12 here. Another difference is that there are more thickness variations for bearings on the Iowa class.

Most of the Iowa class segments are 48' long. The longest is 64'. The shortest is 45'-3 3/4"


Image
Post Posted: Wed Apr 01, 2020 12:28 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
Sean_the_Nailer wrote:
BigJimSlade,
That picture/drawing above, is that perspective from 'inside' the trough/centerline of the hull? Or is it from outside, under the gunnel's? It would seem to me (comparing with my Tamiya 1:350 model) that it is from outside, but that does not mean the model is correct/accurate.



That is the outside of the starboard twin keel looking aft. I hope you are not being confused by the AOTS book that shows bossing on the inside (tunnel side) of the keel where these is none. The tunnel side is flat.
Post Posted: Sat Mar 28, 2020 1:10 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
The outboard screw is in the photo foreground, although somewhat out of focus.
Post Posted: Sat Mar 28, 2020 12:44 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
BigJimSlade,
That picture/drawing above, is that perspective from 'inside' the trough/centerline of the hull? Or is it from outside, under the gunnel's? It would seem to me (comparing with my Tamiya 1:350 model) that it is from outside, but that does not mean the model is correct/accurate.
Post Posted: Sat Mar 28, 2020 12:32 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
This illustrates the moulded lines of that area. It is laid out a a series of three interlocking arcs.

The aft part of the bossing is part of a large casting. The forward part of the bossing would have to have been shaped. It is 3/4" thick so that would have been no easy task.

Attachment:
Shaft Bossing.jpg
Shaft Bossing.jpg [ 66.46 KiB | Viewed 111 times ]
Post Posted: Fri Mar 27, 2020 11:46 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
The anti-corrosion anodes seem to be cut only roughly to similar sizes and then riveted with no more than a nod to careful alignment.

The part of the aft hull illustrated seems to contain complex curves, where the same plate is convex along one direction and concave in the perpendicular direction. Also there are radical changes to radius of curvature over a short distance. I think it would be difficult to align pre-drill the plates with rivet holes without computer modeling. The machining the excess might be necessary anyway just to make sure all plates along the seams meet.
Post Posted: Thu Mar 26, 2020 11:15 am
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
Here is an atypical example of the type of joint that occurs frequently in the Iowa class.

My red line marks the start of the shaft casting. The plating is welded flush to the casting. Forward of the casting is the one-plate D2 strake. Below that are the D and C1 strakes. The D1 strake has a riveted, overlap joint with the strakes below. But then its lower aft corner needs to be flush. The underlap has to be shaved down to allow this. That's a lot of machining for a joint that provides zero benefit. The Kentucky and Illinois were welded flush here.

The typical example of this joint occurs on the bottom at places where strakes divided to create T-shaped joints. Where B overlaps A at the side but is flush with A at the end you get the same kind of corner problem.

|A
A |-------
|B



Attachment:
Plating.jpg
Plating.jpg [ 33.09 KiB | Viewed 219 times ]
Post Posted: Tue Mar 24, 2020 9:10 pm
  Post subject:  Re: More Iowa Class Modeling Trivia  Reply with quote
chuck wrote:
Was the difference in boot topping width present during WWII?

Back of nevelope calculation suggest 20" of added imersion would correspond to 3000 tons of added displacement. were Wisconsin and Missouri 3000 tons heavier?


Those boot topping figures are from an 8/18/41 painting plan with the latest update 6/8/44. The MO/WI directions were added 7/28/43.

There was more armor on the last four Iowa class battleships than on the first two because the Washington and London Treaties were dead when it came time to order their armor.

The transverse armor on the Iowa and New Jersey was 11.3" and 14-1/2" on the Missouri and Wisconsin. The splinter deck and gun tubs were 5/8" on the IA/NJ and 3/4" on the MO/WI.

I calculate the transverse armor is about 6800 ft-sq. x 3.2 x 40 lbs/sq-ft that gives 435 tons.
The splinter deck is about 22,614 ft-sq x 5 lbs/sq-ft = 56 tons.

I don't think that is coming close to 3000 tons. It might have come from somewhere else.

Attachment:
Boot.jpg
Boot.jpg [ 81.06 KiB | Viewed 313 times ]


Not that the bottom of the boot topping on the last four ships is at the same level as the waterline of the IA/NJ (which is slightly higher than the designed waterline).

BTW: I am trying to post the things that I find that appear to be of the most use to modelers. I can only post a small subset of what I uncover just due to volume and I am hampered by the 1200 maximum pixel width here. If you have any requests, let me know and I will try to accommodate.
Post Posted: Fri Mar 20, 2020 10:15 pm
  Post subject:  Re: More Iowa Class Modeling Trivia  Reply with quote
bigjimslade wrote:
On the Iowa and NJ, the bottom edge of the boot topping sloped up towards the stern so that it was 6' 11-1/2" thick at the bow and 29-1/2" at the stern.

On the Missouri and Wisconsin the boot topping was 41-1/2" wide the entire length.

The painting instructions suggest that the Missouri and Wisconsin sat around 20" deeper than the Iowa and New Jersey.



Was the difference in boot topping width present during WWII?

Back of nevelope calculation suggest 20" of added imersion would correspond to 3000 tons of added displacement. were Wisconsin and Missouri 3000 tons heavier?
Post Posted: Fri Mar 20, 2020 2:21 pm
  Post subject:  More Iowa Class Modeling Trivia  Reply with quote
On the Iowa and NJ, the bottom edge of the boot topping sloped up towards the stern so that it was 6' 11-1/2" thick at the bow and 29-1/2" at the stern.

On the Missouri and Wisconsin the boot topping was 41-1/2" wide the entire length.

The painting instructions suggest that the Missouri and Wisconsin sat around 20" deeper than the Iowa and New Jersey.
Post Posted: Thu Mar 19, 2020 11:39 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
Load Duration Curve
Post Posted: Tue Mar 17, 2020 3:25 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
seen all episodes & movies numbers of time. I kind of figured it was LSD but was not certain.
Post Posted: Tue Mar 17, 2020 2:56 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
DavidP wrote:
LDS?


You folks need to watch more Star Trek!!!

https://www.youtube.com/watch?v=pgHxFNFWlZc
Post Posted: Tue Mar 17, 2020 1:53 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
:doh_1:
Post Posted: Mon Mar 16, 2020 8:14 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
It's a popular church group in Utah.
Post Posted: Mon Mar 16, 2020 7:39 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
LDS?
Post Posted: Mon Mar 16, 2020 6:43 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
BB62vet wrote:
I am still unable to make out some of the very small text and did not see any material descriptions other than asbestos.


Sadly, the person doing the microfilming was high on LDS at the time.
Post Posted: Mon Mar 16, 2020 5:01 pm
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
Jim,

Thanks for sending me the .tif file - I am still unable to make out some of the very small text and did not see any material descriptions other than asbestos. I also did not find any color or descriptions of painting instructions, etc. although that could be there (just illegible). The date is 11/16/42 and various details on the drawing indicate which of the ships that particular detail refers to.

Hank
Post Posted: Mon Mar 16, 2020 8:42 am
  Post subject:  Re: Calling all USS Iowa BB-61 class fans  Reply with quote
Is there any evidence these were used on the Iowa's or any other capital ship?
Post Posted: Mon Mar 16, 2020 12:13 am

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