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Topic review - Calling all USS Iowa class (BB-61) fans
Author Message
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I checked out the drawings in Garzke and Dulin and no taper is shown. But... The drawing for the Iowa's does not show a taper either.

Good question!
Post Posted: Fri Dec 14, 2018 1:03 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
chuck wrote:
Fliger747 wrote:
Somewhere in this thread, in a time long long ago, this subject was discussed in some detail. As a note, I believe that the boot topping on the Iowa's (Which has moved around a bit, especially at present) tapers toward the stern and is not as wide there. The apparent reason for this is that there are much more "consumables" loaded forward and the bow will tend to rise more than the stern at a light loading. This is probably an intentional design as the hull has little volume aft below the waterline due to the tapering and shaft tunnel between the skegs.

Good luck!



One reason why the draft at the front of Iowa changes much more than at the back is because of the hull form. How much draft changes when weight is added or removed is proportional to the area of the waterplane. US fast battleships had highly assymmetrical waterplane shale, with extremely blunt and fat aft section with a lot of waterplane area , and long tapering bow entrance with little waterplane Area. This is probably a major reason why Iowa class has much more variable draft in the front than in the rear.


Hello
I am working also in the other two classes. Is the boot topping also tapered?

Attachment:
North Carolina provisional.png
North Carolina provisional.png [ 93.89 KiB | Viewed 139 times ]

Attachment:
Alabama provisional.png
Alabama provisional.png [ 87.99 KiB | Viewed 139 times ]
Post Posted: Wed Dec 12, 2018 6:28 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
Somewhere in this thread, in a time long long ago, this subject was discussed in some detail. As a note, I believe that the boot topping on the Iowa's (Which has moved around a bit, especially at present) tapers toward the stern and is not as wide there. The apparent reason for this is that there are much more "consumables" loaded forward and the bow will tend to rise more than the stern at a light loading. This is probably an intentional design as the hull has little volume aft below the waterline due to the tapering and shaft tunnel between the skegs.

Good luck!



One reason why the draft at the front of Iowa changes much more than at the back is because of the hull form. How much draft changes when weight is added or removed is proportional to the area of the waterplane. US fast battleships had highly assymmetrical waterplane shale, with extremely blunt and fat aft section with a lot of waterplane area , and long tapering bow entrance with little waterplane Area. This is probably a major reason why Iowa class has much more variable draft in the front than in the rear.
Post Posted: Tue Dec 11, 2018 4:27 pm
  Post subject:  Re: BB63 draft  Reply with quote
In the original plans, the boot topping is 17" above and and 5'6-1/2" below the design waterline at the bow and 17" and 12-1/2" below at the stern.

The waterline is 34'7-1/4" above the baseline (34'9-1/4" above the bottom).

I know I found some later diagrams showing the boot topping at a later date but they are somewhere in my massive sorting stacks.

The center of buoyancy is aft of the center of the ship so there is more movement at the bow.
Post Posted: Mon Dec 10, 2018 10:07 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Unless you can come up with some better data! It gets a little interesting when painting a model to incorporate the taper! I had to wedge the bow and stern variously a little when scribing the lines for the boot top.

Cheers: T
Post Posted: Sun Dec 09, 2018 12:38 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Fliger747 wrote:
Somewhere in this thread, in a time long long ago, this subject was discussed in some detail. As a note, I believe that the boot topping on the Iowa's (Which has moved around a bit, especially at present) tapers toward the stern and is not as wide there. The apparent reason for this is that there are much more "consumables" loaded forward and the bow will tend to rise more than the stern at a light loading. This is probably an intentional design as the hull has little volume aft below the waterline due to the tapering and shaft tunnel between the skegs.

Good luck!

Thanks

I found these posts

viewtopic.php?f=2&t=167869&p=745384&hilit=iowa boot topping#p745384

viewtopic.php?f=47&t=4683&p=647483&hilit=iowa+boot+topping#p647483

According these data and with constant tapering:
Attachment:
Missouri provisional.png
Missouri provisional.png [ 91.38 KiB | Viewed 180 times ]


what do you think?
Post Posted: Sun Dec 09, 2018 4:14 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Somewhere in this thread, in a time long long ago, this subject was discussed in some detail. As a note, I believe that the boot topping on the Iowa's (Which has moved around a bit, especially at present) tapers toward the stern and is not as wide there. The apparent reason for this is that there are much more "consumables" loaded forward and the bow will tend to rise more than the stern at a light loading. This is probably an intentional design as the hull has little volume aft below the waterline due to the tapering and shaft tunnel between the skegs.

Good luck!
Post Posted: Sat Dec 08, 2018 8:50 pm
  Post subject:  BB63 draft  Reply with quote
Hello

I am working in some drawings for a book. I have got some questions about Missouri draft and waterline.

Attachment:
Missouri provisional.png
Missouri provisional.png [ 73.79 KiB | Viewed 249 times ]


In the 80 the draft markings are more o less this, with superior waterline at 37'

Attachment:
bb63 proa.png
bb63 proa.png [ 5.81 KiB | Viewed 249 times ]


But Iowa in 1943 had the waterline superior line at 36'
Attachment:
marcas Iowa.jpg
marcas Iowa.jpg [ 167.98 KiB | Viewed 249 times ]


Seems that Missouri don´t use marks in 1945. But, was the waterline at 36' or 37'?

By the way. What was the real level in the mark?
Attachment:
marcas calado.png
marcas calado.png [ 1011 Bytes | Viewed 249 times ]


Thanks in advance
Post Posted: Sat Dec 08, 2018 5:44 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Chuck,

PM me with your email and I'll send you a copy. Note - it is not one long plan - it's chopped up just as I got it from TFD.

Hope this helps,

Hank
Post Posted: Mon Nov 26, 2018 6:11 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
chuck wrote:
Does anyone know of any plans or photos showing the layout of the docking blocks for an Iowa class ship?


I have it for the New Jersey.
Post Posted: Sun Nov 25, 2018 5:48 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Hank has/had a copy of the docking plan for an Iowa, which he used to make a base for his 1:200 NJ.
Post Posted: Sun Nov 25, 2018 1:15 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Does anyone know of any plans or photos showing the layout of the docking blocks for an Iowa class ship?
Post Posted: Sun Nov 25, 2018 12:35 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Missouri had them for Operation Ernest Will in 1987. There was a shortage of these guns in the USN. They were a temporary installation and were removed so they could be installed on other ships operating in the North Arabian Sea / Persian Gulf area.
Post Posted: Sat Nov 24, 2018 8:09 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
I knew the Wisconsin had chain guns but I had not seen them on the Missouri before. Does anyone know which of the Iowas had them and what specific guns? I have seen mention of both 35 and 25 mm. Where were they mounted?
Post Posted: Fri Nov 23, 2018 11:50 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Image
Post Posted: Wed Nov 21, 2018 4:29 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Yes the Chain guns were placed on the platforms on the 01 level, but your photo shows the CIWS of which there were four. The Phalanx is a 20 mm gatling type weapon, radar controlled and firing a depleted uranium shell.
Post Posted: Tue Nov 20, 2018 11:34 pm
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
InchHigh wrote:
25mm Bushmaster.


Thanks for the info!
Post Posted: Tue Nov 20, 2018 9:14 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
25mm Bushmaster.
Post Posted: Tue Nov 20, 2018 8:36 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Any one know what machineguns are placed on the small platforms on the side with the life rafts on the modern Missouri?
And if you have any better pictures of them?

http://www.navsource.org/archives/01/0163010.jpg

Cheers
Post Posted: Tue Nov 20, 2018 6:29 am
  Post subject:  Re: Calling all USS Iowa class (BB-61) fans  Reply with quote
Yes that would be my guess! It's about the only photo I recall of a cowl in grey except for a newly launched ship I have seen.

: )
Post Posted: Sun Nov 18, 2018 2:10 pm

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