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PostPosted: Mon Dec 28, 2015 11:28 am 
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Model Monkey
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The design for a 3D-printed Aft Funnel and Upper Anti-aircraft Deck (hangar roof) is complete.

It is available in 1/350 and 1/700 scales. Features:
- unusual chevron rain deflector over a porthole (normally over A/T doors)
- 5" ready service lockers with subtle, raised heat radiators
- correct number and style of exterior funnel pipes
- four-uptake funnel (hollow completely through)
- fully planked and properly cambered deck

Depending upon which Indianapolis kit you have, some adjustment to either this part or the kit's parts, or both, will be necessary for best fit. 3D-printed acrylic plastic is very fragile. Caution is advised during adjustment.

Happy New Year!


Attachments:
Portland 1942 Aft Funnel.a.png
Portland 1942 Aft Funnel.a.png [ 199.49 KiB | Viewed 2683 times ]
Portland 1942 Aft Funnel.b.jpg
Portland 1942 Aft Funnel.b.jpg [ 196.9 KiB | Viewed 2683 times ]
Portland 1942 Aft Funnel.c.jpg
Portland 1942 Aft Funnel.c.jpg [ 172.35 KiB | Viewed 2683 times ]
CA-33 1941.12.07 4698cfd44ed91f3c_small.jpg
CA-33 1941.12.07 4698cfd44ed91f3c_small.jpg [ 165.78 KiB | Viewed 2683 times ]

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Last edited by ModelMonkey on Wed Dec 30, 2015 6:59 pm, edited 2 times in total.
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PostPosted: Mon Dec 28, 2015 8:17 pm 
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Are you going to include holes, or posts for the crane's tripod-post/mast?

It looks like those are missing, and without a drill-press at home, I would not trust myself to drill the holes by hand.

As soon as the USS San Francisco is finished, I will be ordering this to go with my Tamiya Indianapolis (to convert it).

That will finally complete the collection of Ships (kits) that were surface combatants at all of the battles of 1942 in the Solomons.

Now I need to get the carriers and the rest of the fleet stationed down there as well (only some 300 odd ships, you know... :wacko:).

I seem to be doing better on the IJN end for collecting large numbers of ships. Having all of the Fubukis and Shiratsuyu's was a big boon. I will soon have all of the Ayanamis, Akitsukis, and Kagerōs as well.

Good thing the Portland-class was just two ships.

I don't have any reference materials (other than Navsource) on the differences between Portland and Indianapolis, Early-war. So I will have to see what all it would take to do an Early-war Indianapolis out of this conversion kit.

MB

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HIJMS Aoba & Kinugasa
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HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Mon Dec 28, 2015 10:51 pm 
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Model Monkey
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MatthewB wrote:
Are you going to include holes, or posts for the crane's tripod-post/mast?

It looks like those are missing, and without a drill-press at home, I would not trust myself to drill the holes by hand.

I can easily design in holes, but it is unlikely the various kits' tripod parts would fit the holes I design. My thinking was to let the modeler cut the plastic kit's tripod's rear leg parts and have the tripod's rear legs' tops rest on the roof, with lower legs installed underneath it.

Thoughts?

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PostPosted: Tue Dec 29, 2015 2:11 pm 
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I was thinking just add the tripod mast to the conversion kit.

Part of the problem is that the kits don't have the same mast for the crane. The Late-war Indianapolis didn't have the same smaller tripod-mast for the crane.

Image

The Tripod mast for the crane of the Late-War Portland-class is a narrower and shorter Tripod, that doesn't have the aft-legs go all the way to the deck.

So, the user of the conversion kit will have to build one themselves, at the very least (in which case putting in holes to align it would be a good idea). Or at least adding the mast to the model so that they don't have to build the part.

MB

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Working on:


1/700 (All Fall 1942):
HIJMS Nagara
HIJMS Aoba & Kinugasa
USS San Francisco
USS Helena
USS St. Louis
USS Laffey & Farenholt
HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Tue Dec 29, 2015 2:14 pm 
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Oh! And didn't the Early-war Portland had roller-doors that came down from the top for the Hanger-doors?

MB

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Working on:


1/700 (All Fall 1942):
HIJMS Nagara
HIJMS Aoba & Kinugasa
USS San Francisco
USS Helena
USS St. Louis
USS Laffey & Farenholt
HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Tue Dec 29, 2015 3:29 pm 
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Model Monkey
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MatthewB wrote:
I was thinking just add the tripod mast to the conversion kit....So, the user of the conversion kit will have to build one themselves, at the very least (in which case putting in holes to align it would be a good idea). Or at least adding the mast to the model so that they don't have to build the part.

Because the legs are so narrow compared to length, experience indicates that if these were 3D-printed they would be so fragile as not to survive shipping, even if they could be printed in 1/700.

Also, posts or columns printed at an angle have more noticeable printing striations (than do vertical surfaces) that have to be smoothed by the modeler by gentle sanding to look their best. The two angled crane kingpost supports would be so narrow and fragile that they would surely break during smoothing. Instead, I recommend modifying the kit's plastic crane tripod (probably better called a "supported kingpost") and rest it on the roof. Use plastic or brass rod to replicate the lower support legs that reach to the deck. This should be a comparatively minor effort after modifying the Indy hull.

MatthewB wrote:
Oh! And didn't the Early-war Portland had roller-doors that came down from the top for the Hanger-doors?

Quite right. They rolled down from just inside the hangar. Indianapolis (before 1943) and other early war US cruisers had similar hangar doors, as did many British warships. Here's Portland:

Attachment:
CA-33 1941.12.07 6ccd7bac235b8e27_small.jpg
CA-33 1941.12.07 6ccd7bac235b8e27_small.jpg [ 198.42 KiB | Viewed 2596 times ]

Sistership Indianapolis appears to have had her roller doors replaced, possibly with vertical shutters, as seen here in May, 1943. Perhaps the original roller doors were found to be too weak, impractical in service or a maintenance headache.

Attachment:
CA-35 1943.05.01 n47569.jpg
CA-35 1943.05.01 n47569.jpg [ 148.86 KiB | Viewed 2596 times ]


The roller doors are not included with any of the 3D-printed conversion parts. Here's a December, 1941 closeup of the real thing to help the modeler decide if replicating them or just leaving the hangar bays open is best:

Attachment:
CA-33 1941.12.07 bb926a1336f3e78b_small.jpg
CA-33 1941.12.07 bb926a1336f3e78b_small.jpg [ 196.11 KiB | Viewed 2586 times ]


Please be reminded that these 3D-printed parts do not constitute a complete Indy-to-Portland conversion kit. Major superstructure parts are being designed to help advanced modelers convert Indy to Portland. Some scratch-building is necessary to complete the conversion.

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Complete catalog: - https://www.model-monkey.com/
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PostPosted: Sun Jan 17, 2016 10:08 pm 
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Model Monkey
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The Aft, Lower Anti-aircraft Deck design is complete.

It is available in 1/700 and 1/350 scales. Just go to my store on Shapeways and click on the scale you need on the left side of the page:
http://www.shapeways.com/shops/Model_Monkey

Features:

- planked, properly cambered (arched) deck, extents matching photos of the actual ship
- 5" ready service lockers with subtle, raised heat radiators
- accurate, asymmetrical deck vents with proper rain deflectors
- accurately shaped main battery director with entrance vestibule with proper 4-panel door
- raised whaleboat platform between service lockers and vents
- accurate splinter shielding shape with conical "dimples" on the aft sides
- accurately shaped incinerator with trash door and slot for exhaust pipe (pipe not included)
- raised 1.1" "Chicago Piano" tubs with splinter shielding shape and rib details consistent with photos
- slightly raised pedestals for 5"/25 AA mounts (mounts not included)

It is designed to compliment the Upper AA Deck with Aft Funnel as seen in the rendering at bottom.

Enjoy!


Attachments:
Portland 1942 Lower AA Deck.png
Portland 1942 Lower AA Deck.png [ 179.74 KiB | Viewed 2510 times ]
Portland lower AA deck.b.jpg
Portland lower AA deck.b.jpg [ 174.97 KiB | Viewed 2510 times ]

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PostPosted: Tue Jan 19, 2016 3:31 pm 
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The Aft Superstructure design is finished.

This completes all of the various superstructure sections to convert your 1/700 or 1/350 scale USS Indianapolis model kit to sistership USS Portland.

Here's a link to the store. On the left hand side of the page, just click on the scale that interests you.
http://www.shapeways.com/shops/Model_Monkey

Features:
- keyed to precisely fit the the Lower Anti-aircraft Deck (available separately)
- accurate porthole, door and other detail placement consistent with photos of the actual ship
- accurate A/T 4-panel door and flat door types and placement
- rain deflector detail
- integrated bulkhead-mounted antenna lead insulator details
- two equipment lockers with subtle, raised doors
- large intake vents left open, ready for PE screen (not included)
- 20mm Oerlikon position with thin, circular splinter shield
- slightly raised pedestal for the ship's boat crane (not included)

The two renderings at bottom show how the three aft superstructure sections fit together.


Attachments:
Portland 1942 Aft Superstructure.c.png
Portland 1942 Aft Superstructure.c.png [ 187.6 KiB | Viewed 2429 times ]
Portland 1942 Aft Superstructure.a.jpg
Portland 1942 Aft Superstructure.a.jpg [ 156.91 KiB | Viewed 2429 times ]
Portland 1942 Aft Superstructure.b.jpg
Portland 1942 Aft Superstructure.b.jpg [ 156.03 KiB | Viewed 2429 times ]

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PostPosted: Tue Jan 19, 2016 8:15 pm 
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Steve ,

Looking awesome!! Any chance before I pick these up, for you to do the 20mm tubs that were on the main deck abreast this structure?

Matt

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PostPosted: Wed Jan 20, 2016 8:39 am 
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I am still trying to find reasonable drawings of the Portland during her earlier years.



MB

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Working on:


1/700 (All Fall 1942):
HIJMS Nagara
HIJMS Aoba & Kinugasa
USS San Francisco
USS Helena
USS St. Louis
USS Laffey & Farenholt
HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Thu Jan 21, 2016 4:05 pm 
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Model Monkey
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Turrets are ready.

See: viewtopic.php?f=16&t=161516&p=679724#p679724

Attachment:
8in-55cal Turrets.a.png
8in-55cal Turrets.a.png [ 148.29 KiB | Viewed 2275 times ]


Attachment:
8in-55cal Turrets.b.png
8in-55cal Turrets.b.png [ 161.46 KiB | Viewed 2275 times ]


Attachment:
8in-55cal Turrets.c.jpg
8in-55cal Turrets.c.jpg [ 118.09 KiB | Viewed 2275 times ]


Attachment:
CA-33 1943.03.03 1537-43.small.jpg
CA-33 1943.03.03 1537-43.small.jpg [ 199.63 KiB | Viewed 2275 times ]


Aft 20mm Oerlikon tubs are available, too.



This completes all design work for 3D printing for USS Portland CA-33 as she appeared in the summer of 1942.


Attachments:
Portland Aft Gun Tubs Rendering.png
Portland Aft Gun Tubs Rendering.png [ 167.53 KiB | Viewed 2000 times ]

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Complete catalog: - https://www.model-monkey.com/
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Last edited by ModelMonkey on Tue Mar 22, 2016 9:17 am, edited 1 time in total.
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PostPosted: Thu Jan 21, 2016 10:39 pm 
Is there any chance that you could produce plans/drawings to illustrate how to use the parts?
Phil


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PostPosted: Thu Jan 21, 2016 11:27 pm 
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phlevels wrote:
Is there any chance that you could produce plans/drawings to illustrate how to use the parts?
Phil

Here you go. As you can see, they aren't plans or instructions per se, they are renderings to show how the parts are arranged:

Attachment:
1-200 Portland Forward Superstructure and Aircraft Handling Deck.jpg
1-200 Portland Forward Superstructure and Aircraft Handling Deck.jpg [ 177.87 KiB | Viewed 2235 times ]


Attachment:
Portland 1942 Aft Superstructure.a.jpg
Portland 1942 Aft Superstructure.a.jpg [ 156.91 KiB | Viewed 2235 times ]


For most kits, the parts are nearly direct replacements for the Indianapolis kit's parts, except for the hull surgery needed for the plastic model's hull to accept the much longer aircraft handling deck and the much shorter forward superstructure. Some very good photos of how another modeler performed the hull surgery can be found earlier in this thread.

Hope this helps!


Attachments:
File comment: Aft gun tubs location. Drawing by Profile Morskie. Unlike this drawing, photos of the ship show that the fantail tub does not have an opening.
Portland 42 Aft Gun Tubs.png
Portland 42 Aft Gun Tubs.png [ 198.4 KiB | Viewed 2003 times ]

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Complete catalog: - https://www.model-monkey.com/
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Last edited by ModelMonkey on Tue Mar 22, 2016 9:12 am, edited 1 time in total.
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PostPosted: Fri Jan 22, 2016 7:10 am 
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Will those boats actually fit on the boat decks there?

Or will we have to get creative with their cradles?

I also thought the earlier photos were for a different conversion than with this kit.

MB

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Working on:


1/700 (All Fall 1942):
HIJMS Nagara
HIJMS Aoba & Kinugasa
USS San Francisco
USS Helena
USS St. Louis
USS Laffey & Farenholt
HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Fri Jan 22, 2016 8:43 am 
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Model Monkey
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Good questions, Matt!

No worries about the photos. There are three really good sets of photos available that helped ensure the accuracy of these designs.

1) The first set of very highly detailed, high resolution photos were taken by Life Magazine about December 7th, 1941. They show incredible detail. But some of the features in those photos had been removed or changed prior to Coral Sea and Midway. They are available from Getty Images but are very hard to find using their search engine. You have to be patient and persistent on their site, but it's worth it. Example (low-res version to fit on this site):

Attachment:
CA-33 1941.12.07 4698cfd44ed91f3c_small.jpg
CA-33 1941.12.07 4698cfd44ed91f3c_small.jpg [ 165.78 KiB | Viewed 2206 times ]


2) photos taken in 7 and 14 June, 1942, just after Midway (Portland was a participant at Midway). These photos show which major features were present in the summer of '42. Link: http://www.navsource.org/archives/04/033/04033.htm Example:

Attachment:
CA-33 1942.06.07 0403306.jpg
CA-33 1942.06.07 0403306.jpg [ 108.73 KiB | Viewed 2206 times ]


3) photos taken in November, 1942 and closely later, showing the massive torpedo damage to the stern, and subsequent photos taken of the repairs in progress. They confirm major 1942 features present and some details (e.g., turret bolt location and type). Same link as above. Example:

Attachment:
CA-33 1943.03.03 1537-43.small.jpg
CA-33 1943.03.03 1537-43.small.jpg [ 199.63 KiB | Viewed 2206 times ]


The major features and details were confirmed present or absent by the "Midway Photos" and the "Torpedo Damage Photos" and carefully cataloged against 2D plans. The "Life Magazine Photos" could then be used to design the details (planking extents, door type, splinter shield shape, 5" service ammo locker details, porthole and vent position, etc.) since they are so good. A word of note about the Life Magazine photos - they are simply fantastic but several of them were reversed when published! Since many features of the ship are asymmetrical, I spent a great deal of time determining which photos were reversed and "flipped" those accordingly.

Several 2D drawings were studied to make the designs. No one set of 2D drawings turned out to be perfect when compared to photos. For example, you may have the Portland '42 Profile Morskie drawings, which are indeed very helpful (the Midway and Torpedo Damage photos show that Profile Morskie drew major features essentially correctly for the summer of '42), but they have some minor accuracy issues as shown by photos and Navy plans (door type, turret dimensions, porthole placement, tripod shape, splinter shielding shape, etc. aren't quite right). They proved very good for cataloging features that then need further research to confirm shape, extents, and details.

You can be sure that these designs are well-researched.

Regarding the boats, I omitted boat cradles for those two boats, primarily because PE is a much better medium for cradles because of its thinness. These two boats (at least the starboard boat) do appear in a June 14, 1942 photo. The cradle type and location can be inferred by the modeler from the position of the boats.

Attachment:
CA-33 1942.06.14 0403302.f.jpg
CA-33 1942.06.14 0403302.f.jpg [ 136.16 KiB | Viewed 2206 times ]


Hope all this helps.

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-Steve L.

Complete catalog: - https://www.model-monkey.com/
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PostPosted: Wed Feb 03, 2016 6:58 am 
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For those who would like proper base rings for the turrets of any of your USN cruiser builds, CA-24 through CA-35, here you go.

Base rings for turrets 1 and 2 have bottoms with accurate shear (sloped deck). The base rings for turrets 3 and 4 are flat-bottomed. For Pensacola and Salt Lake City, you'll need the base ring for turret 4. They are connected together for printing purposes by sprue attached to the bottoms, easily removed with care.


Attachments:
Pensacola base rings.png
Pensacola base rings.png [ 152.72 KiB | Viewed 2131 times ]
Pensacola base rings.a.jpg
Pensacola base rings.a.jpg [ 96.34 KiB | Viewed 2131 times ]

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PostPosted: Wed Feb 03, 2016 7:04 am 
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Wasn't turret #1 the only one where the deck had any sheer?

Turret #2 was mounted to the deck house.

What does this "Sheer" do exactly, since the deck is essentially flat at those locations?

MB

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Working on:


1/700 (All Fall 1942):
HIJMS Nagara
HIJMS Aoba & Kinugasa
USS San Francisco
USS Helena
USS St. Louis
USS Laffey & Farenholt
HIJMS Sub-Chasers No. 4 - 7
HIJMS Sub-Chasers No. 13 - 16


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PostPosted: Wed Feb 03, 2016 7:53 am 
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Hi, Matt!

Actually, where the forward two turrets are located, the main deck has considerable shear and is not flat at all. This shows up in plans and photos of the ships. Look carefully at the bottom of the base ring for Turret #2 in the photo of Portland's forward deckhouse below. Notice how the deck is higher at the front of the base ring than it is at the back. This is due to the deckhouse roof's shear.

Attachment:
CA-33 1944.07.16 0403332.crop.jpg
CA-33 1944.07.16 0403332.crop.jpg [ 123.61 KiB | Viewed 2127 times ]

On most, if not all, pre-war designed USN cruisers, the roof of the forward deckhouse also has shear (slope), following the upward curve of the main deck. Additionally, the decks of these ships have subtle camber (arched when viewed fore-aft), which, among other benefits for a rolling hull, helps with water runoff.

But a heavy turret rotates best when level. Because of the need for a level platter for the turret to rotate upon, and the presence of deck shear, the forward base rings are flat on top but appear sloped on the bottom. The real base rings actually pass through the deck and have no shear. But for modeling purposes, the 3D-printed base rings lie on top of the deck, not through it. When the 3D-printed parts are fit to your model, they will match the deck's slope while being flat on top, just like the real ship.

Hope this helps!

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PostPosted: Wed Feb 03, 2016 1:58 pm 
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Steve, Just a note on your Portland 20 mm gun tubs. The tubs you have provided for Portland 1942 have uses on many other ships during the 1942/43 time period. The tub for turret 3 on the Portland is the same as the tub on turret 3 of the Pensacola and the two other tubs were also installed on the Chicago during her refit after Salvo Island and the Honolulu received a pair of these during her October 1942 refit. For Honolulu these were part of her fit during Kula Gulf and Kolombangara. They were placed either side of the aft superstructure on the main deck aft of the 1.1" guns. So your tubs are very useful for other models. Thanks for doing these.


Last edited by Frank Fowler on Wed Feb 03, 2016 2:50 pm, edited 1 time in total.

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PostPosted: Wed Feb 03, 2016 2:50 pm 
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Sorry, my last post should have said turret 3 of Pensacola not turret 4 (I have corrected). Also, Helena had a pair of single 20 mm tubs like the Portland pair.


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