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 Post subject: CA-72 CAD hull model
PostPosted: Thu May 13, 2010 9:04 pm 
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Here are two images of the CA-72 3D CAD hull. It is one of the second generation Baltimores with the rounded stern. This is still preliminary - notice the wrinkles in the surface. However, the pictures do show the characteristics of the hull surface.

This isn't a very accurate model. It was created from the station lines drawing on the blueprints, and there were some very large errors. The after lines were more than a foot narrower abeam than the forward lines, and none scaled correctly relative to length and height. Fortunately, in a CAD program there is a "Scale" function that allows you to correct such errors. I cannot imagine how they built these things without computers!

For really accurate models you need to work from the offsets tables (numerical definitions for points on the hull surface).


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CA-72 hull 2.jpg
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PostPosted: Wed Sep 01, 2010 8:42 am 
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Hello, I just stumbled onto this thread, and I'm hoping someone can help me. I'm building a boltimore class cruiser kit, and I would like to have the hangar open and maybe even an aircraft being raised/lowered, but I am stuck and I am hoping that maybe someone here could answer a couple of questions or point me to a source. Does anyone know how the kingfishers would be taken in/out of the hangar, The wingspan seems larger than the opening, would they fit diagonally, or maybe tilted so one wing came out first? or would they remove the wings and reinstall them on deck? (I've seen a photo of one in the hangar of the uss vincennes with the wings removed, although the caption reads that they are scrapping that one for parts so maybe thats why they are off in the photo.)

the second question is; Are their any plans of the hangar bay available, I've searched the web for quite awhile now (how I came upon this thread) and there aren't any photos showing the interrior, at least not enough to scratchbuild one from. I would even use photos of a cleveland class as a reference as there must have been some similarities, but there aren't any of those around either.

I really hope there is someone out there who can help,
thanks for your time - John


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PostPosted: Wed Sep 01, 2010 11:26 pm 
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In answer to the aircraft question, a bit of history would help. Earlier cruisers carried the SOC and its variants. That aircraft had folding wings, as did all of the SO series. They were scouts first (the "S" in the designation). Their intended replacement was the SO3C Seamew. That aircraft suffered from a defective engine, and the other qualities of the aircraft did not lend themselves to an easy replacement. As a result of the failure of the SO3C, the SOC's were retained in the fleet, but their numbers were insufficient, so OS2U Kingfishers were pressed into service to fill the gap. These aircraft were designed for the BB's, so folding wings were not considered necessary. The net result was that cruisers that carried the Kingfishers couldn't use the hangar for what it was intended. The planes stayed on deck. The single-seat SC was the final floatplane solution for both cruisers and BB's, and it did have folding wings.


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PostPosted: Fri Sep 03, 2010 9:25 pm 
I have done a little reading and it seems the Curtis SO3C Seamew was designed with a 15'-3" folded wing width in order to fit new heavy/light cruiser hanger openings. Unfortunately the Seamew didn't work out . . . but the Vought O2SU Kingfisher, even though it had no folding wing capability (wingspan 35'-11" X length 33'-7"), was the most popular and prefered alternative. Most cruisers are listed as carrying four to six O2SU's and apparently those not stored on deck were kept in the hanger dis-assembled. I would guess they were not down to the nuts and bolts but probably 'wings removed' dis-assembled. The previous SOC-3 and later SC-1 both had folded wings. This seems to be a serious endorsement as to the rugged and effective capabilities of the Kingfisher.


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PostPosted: Sun Sep 05, 2010 12:52 am 
Hello again, reading further it appears that the Kingfisher's original specifications were designed for coastal recon deployment and Battleship use. Folding wings were not required. Hope this helps!


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PostPosted: Sat Jan 08, 2011 1:32 pm 
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Im currently working on the 1/700 trumpeter kit in 1943 fit, what measure was she painted as commissioned? From the photos I have found she appears to be in a neutral gray. The instructions are telling me to paint her hull in navy blue.

EDIT: I figured it out, she's measure 21

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 Post subject: 1:700 Model ship
PostPosted: Fri Nov 25, 2011 10:54 am 
Does anyone know where I can find the USS Macon CA?


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PostPosted: Sat Mar 10, 2012 11:29 am 
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Film clip of USS Quincy that looks to be edited from different filmings. Nice shots of main battery fire control director..
Aside from the editing, this is labeled as 1946, but the enlisted still have their white caps dyed blue so I question that.

http://www.criticalpast.com/video/65675 ... enemy-ship


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PostPosted: Tue May 01, 2012 12:21 pm 
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My Baltimore conversion USS Chicago CG-11. She will be part of my Tonkin Gulf fleet. found some photos on google that will help me out on the build. Image Image Image


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PostPosted: Sat Sep 08, 2012 2:50 pm 
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Hi all,
A model of Pittsburg.

Image

Image

More here:
viewtopic.php?f=60&t=111555

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Last edited by Kometa on Wed Nov 30, 2016 4:58 pm, edited 1 time in total.

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PostPosted: Sun May 05, 2013 8:08 pm 
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Newbie to naval modeling here with a request. I've recently finished the Dragon USS San Diego and would like to build the Trumpeter USS Baltimore as the ship appeared during her first combat deployment. Reading earlier posts it appears some parts are needed from the 1944 version kit to bring the 43 up to this standard. Does anyone out there have a tweaks list identifying the parts/modifications needed?


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PostPosted: Wed Nov 27, 2013 7:29 am 
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Hello all from Canada, (it's 4 AM here in Vancouver as of this posting and I can barely sleep)

I am another ship modeller who just found this wonderful forum. So much information and insights from past posts! Wow! I did a lot of modelling- mostly waterline 1/700 series ships from Tamiya, etc. - way back in my teenage years in the 1990s. Now in my 30s, I recently got back into ship models.

Still, I just have a question about the Baltimore class CAs as well, so I necroposted this older thread since it had the most posts for past reference.

Did all the Baltimore class ships have their bridge superstructures modified to have the square bridge top as stated below? Or were there any ships in the class that had their superstructures unmodified until at least 1945?

I am asking since I am considering buying the Trumpeter Baltimore 1943 kit, and was wondering if the kit can be used to depict other ships in the class, specifically the 2nd cruiser USS Chicago (CA-136). I assuming the Chicago had the square bridge top, but did she ever have the unmodified bridge that the class leader had at commissioning?

I would have bought the Baltimore 1944 kit, but it's not available at my local hobby store (strange they don't have this, but have the other one, eh?) and it takes a while for them to order such kits. I previously tried to order the Aoshima 1/700 Japanese battleship Yamashiro but the order didn't go through because their suppliers couldn't meet the order. That's why I was considering just buying the 1943 kit.


GaryJ in NC wrote:
The Trumpeter 1943 BALTIMORE portrays the ship "as commissioned" on April 15, 1943. However, by June she had received additional quad 40mm mounts, including the fantail mount offset to port. She also received some bridge modifications which included a square front bridge top. By the time she deployed in September 1943, BALTIMORE looked more like the 1944 PITTSBURGH kit in the superstructure; therefore, I am using parts from an extra PITTSBURGH in order to represent BALTIMORE as she appeared in September 1943. As can be seen in the Trumpeter 1944 BALTIMORE kit, the July-October 1944 refit made further changes.

I have no idea why Trumpeter made the 1943 kit "as commissioned" instead of "first deployment." She was in that configuration for less than 60 days. The "first deployment" variation is much more interesting from a historical standpoint.

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PostPosted: Fri Nov 29, 2013 11:29 pm 
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CCGSailor, i'm in ontario north of toronto. baltimore has a flat transom http://www.navsource.org/archives/04/068/0406811.jpg compared to chicago's rounded transom http://www.navsource.org/archives/04/136/0413604.jpg . flat transom baltimores had 2 stern cranes with 2 20mm aa gun tubs later 1 twin 40mm aa tub http://www.navsource.org/archives/04/068/0406867.jpg wereas rounded transom baltimores had 1 stern crane & 2 twin 40mm aa tubs 1 on either side of the crane.


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PostPosted: Fri Nov 29, 2013 11:40 pm 
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That's a quad 40mm on CA-68's stern David. Crane is blocking second set of barrels.

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PostPosted: Sat Nov 30, 2013 12:48 am 
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DavidP wrote:
CCGSailor, i'm in ontario north of toronto. baltimore has a flat transom http://www.navsource.org/archives/04/068/0406811.jpg compared to chicago's rounded transom http://www.navsource.org/archives/04/136/0413604.jpg . flat transom baltimores had 2 stern cranes with 2 20mm aa gun tubs later 1 twin 40mm aa tub http://www.navsource.org/archives/04/068/0406867.jpg wereas rounded transom baltimores had 1 stern crane & 2 twin 40mm aa tubs 1 on either side of the crane.


David,

Thanks for your reply. It helped me in deciding not to buy Trumpeter's 1943 Baltimore kit. I would have preferred a kit of the class with a rounded transom.

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PostPosted: Sat Nov 30, 2013 4:39 pm 
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Cliffy B, thought it was supposed to be a quad but wasn't certain.


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PostPosted: Tue Dec 03, 2013 9:44 am 
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I'm planning another collection (nearly finished with the Northamptons CA-26-31). This collection will be the 5 Chicago's I've already finished SSN-721 I have kits for CG-11 and CA-14, I plan to get another Corsair Armada Houston to do an early war/pre-war CA-29. I have the Trumpy Pittsburg to do CA-136 and have the book on the Los Angeles. My question is are there MAJOR differences between the LA and Chicago and how much work will be required to change Pittsburg to Chicago?

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PostPosted: Tue Dec 03, 2013 11:06 pm 
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look at the middle deck level of the forward part of the superstructure in both links.
Los Angeles http://www.navsource.org/archives/04/135/0413541.jpg
Chicago http://www.navsource.org/archives/04/136/0413601.jpg
might be alright with Pittsburg to Chicago.


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PostPosted: Wed Dec 04, 2013 6:35 pm 
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DavidP wrote:
CCGSailor, i'm in ontario north of toronto. baltimore has a flat transom http://www.navsource.org/archives/04/068/0406811.jpg compared to chicago's rounded transom http://www.navsource.org/archives/04/136/0413604.jpg . flat transom baltimores had 2 stern cranes with 2 20mm aa gun tubs later 1 twin 40mm aa tub http://www.navsource.org/archives/04/068/0406867.jpg wereas rounded transom baltimores had 1 stern crane & 2 twin 40mm aa tubs 1 on either side of the crane.


Dave,
If you don't mind my asking which source that has a comprehensive list that says which of the class members have rounded or flat transoms?

Or should I go through photos of each class member individually at navsource.org?

Thanks in advance.

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PostPosted: Wed Dec 04, 2013 6:55 pm 
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If I remember correctly ONLY the first 4 members of the class had the twin crane/squared stern arrangement, IE CA-68-71. The remainder had the 1 crane/rounded stern arrangement. All ships retained their respective stern shapes regardless of the modernizations/conversions performed.

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