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Old 02-06-2022, 04:45 PM
rjccjr rjccjr is offline
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USS Juneau CL-52

Hi All;

Actually the first installment of this thread wound up getting attached at the end of the DD-793 thread. So this part is really the second entry. Last weekend we got two feet of snow. This weekend we had about an inch of sheet ice. After cleaning up from that there are a couple of very aggravated arthritic knees and a whole bunch of complaining muscles. Still, it provides time to get some work done on CL-52. There's a nav source photo of the ship taken during the Battle Of Santa Cruz it looks as though the forward hull and superstructure are gray, but the after section of the hull is distinctly lighter. I took a picture of the midship section of the profile drawing and colored the after section Montbatten Pink. The forward section of the hull was colored dark gray. The picture was then printed out in black and white. The gray tones of the result are very close to the original picture. The ship was sunk in November and now the question occurs, were the vertical surfaces Montbatten Pink at the time of her sinking? Lots of color research ahead.

Today, the size and shape of the central keel drawing came to an acceptable measurement. The waterline is .005 inches short and the length over all is .05 inches long. The beam is 3.3 inches. These differences would not be noticeable on a thirty three inch model. The importance of the keel is that the weather deck size and the base plate can adjusted to it. That sets up the proportions of the bulkheads, which will be one inch apart. We are now in business for getting the mock up hull together and everything else can be projected from that. This procedure is, of course, about as fascinating as watching rocks grow, but it is the heart of generating an accurate model. The build will have lots of pictures, but this part consists of dull looking drawings.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-color-test-2.jpg   USS Juneau CL-52-central-keel-1.jpg   USS Juneau CL-52-central-keel-2.jpg  
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  #2  
Old 02-13-2022, 02:30 PM
rjccjr rjccjr is offline
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Hi All;

As soon as you translate the dimensions into drawings and break the segments to fit into letter size pages you get into trouble. There will be four parts to each section. That's six pages. The central keel is the most critical part of the model. It has to fit the base plates and the weather deck plates exactly to bring the hull into alignment. The central keel and weather deck provide the beam and proportion the bulkheads. The vertical keel provides the height at the bulkhead stations which are going to be spaced an inch apart. Upon examining the first drawings the keel turned out to be over sized. Taking a ruler to the drawing, there was a small overage between the bow and the first bulkhead station. That, of course, telescoped all of the stations along the hull, creating the excess. The next move was to draw an exact one inch line on the computer, generate a ruler from that and print the first segment. That worked. The ruler was copied and pasted to the other drawings to get all the dimensions correct. It took all week to redraw everything and get it to the correct size. The waterline length is now 33.125", length over all is 33.64" and the beam is 33.1 inches. It all adds up to 1/192 scale. It's going to be a big model. Now an outside profile will be drawn to proportion the superstructure, and the bulkheads will be generated. With the outside profile drawn, the side plates can be roughed out and a mockup of the hull can be printed on card and tested. The keel is now fitted for tabs, but the deck are not quite ready. That will be this week's project. The forward section of the profile is ready and the good news is that the drawings of the twin five inch turrets of the DD-850 model will fit quite nicely. Those turntables and elevating devices were a delicate time consuming nuisance and it's a luxury not to have to go through that again.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-central-keel-1.jpg   USS Juneau CL-52-base-plate-stern.jpg   USS Juneau CL-52-weather-deck-stern.jpg  
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  #3  
Old 02-20-2022, 01:33 PM
rjccjr rjccjr is offline
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CL-52 update

Hi All;

Well, today is sort of a keel laying day, a nice bright sunny New England day. It started at sixteen degrees and is now up to a blistering twenty six. Found a beautiful building plank during the week. The central keel, base plate, weather deck and first eight bulkheads are drawn. Even before anything gets glued there are difficulties. The hulls of the Atlanta class cruisers were rounded along the deck edges. It was obvious that this was going to be a challenge during the build. Well it's a problem in the design as well. Two difficulties presented themselves when the drawing of the bulkheads began. First came the curved edges. They caused difficulties with the edge of the weather deck. The second was a pronounced knuckle of the side plates, from the bow to just forward of the third turret. It took all week to solve that, but the first eight bulkheads are drawn. The hull aft of that is slab sided until it approaches the stern, where it curves inward at the waterline. That shouldn't be as bad as the forward section. Rather than do the mock up of the entire hull at one time, this will require doing the forward section first. Everything forward will have to be dry fitted and modified before anything gets glued down.

The process started with drawing a light pencil line right down the center of the wood base. Then the forward plate and keel were positioned. The dimensions so far seem to be fairly good. During the coming week I hope to get the card base plates and keel parts connected and test fitted. Here are photos of the forward bulkheads and the positioning of the forward parts. It's a good thing that I never gave up my day job, because it would never work out for making a living.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-bhds-1-8.jpg   USS Juneau CL-52-013.jpg   USS Juneau CL-52-014.jpg   USS Juneau CL-52-015.jpg  
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Old 02-20-2022, 02:24 PM
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rickstef rickstef is offline
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I have moved this thread to the Ships subforum
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Old 02-22-2022, 09:35 PM
PAPER FAN PAPER FAN is offline
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Looking forward to this post. I recently built USS San Diego on this forum. She's virtually identical. Your model won't really be too large based on models here. These are beautiful ships, simple but very clean lines. Their beauty belies there poor usage in real life, no match for surface engagements.
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Old 03-01-2022, 03:21 PM
rjccjr rjccjr is offline
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CL-52 update

Hi All;

The four sections of the base plate and central keel are now complete with tabs and thirty three bulkheads are drawn. All parts are set out of the building board, but nothing gets glued until everything is measured out and dry fitted. The weather deck is drawn, but will not be cut until the previous parts are glued and tested. No doubt some of the bulkheads will require adjustment before the weather deck can be fitted. The curvature along the deck edge is going to present a problem and will necessitate some adjustment before that deck can be glued. In small scales the issue can be avoided, but at 1/192 it cannot be avoided. The Atlanta class design is an anomaly in American cruiser design because there is a pronounced knuckle in the forward sides of the hull. It is familiar on British ships, but unique to American vessels. Chances are that the designers anticipated a problem with sea keeping in heavy weather and a high center of gravity. Hence the knuckle to help shedding water. Once World War II was in progress and anti aircraft armament increased, top heaviness became a universal problem.

For those of you who may be new to card construction, taking care to score all folds and cutting out all slots or openings before you cut out the part will keep you out of a lot of trouble. The same goes for dry fitting everything before gluing. The principal is, accuracy is more important than speed. If you glue too quickly, you will lose any time saved when you have to repair the mistake. This is all preliminary work, but it is critical for saving redesign and repair as you get further into the project. The usual procedure is to build a rough mock up of the model to insure clearance and proportion of major structures before settling down to detailed design. There is immense frustration in taking the trouble to design a rotating turret that won't work because it collides with a deck house. Once the skeletal structure is accurate and complete the side plates will come next. There are several ways to deal with deck edge and chances are that test sections of each will be built before deciding which method will actually be used.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-004.jpg   USS Juneau CL-52-009.jpg   USS Juneau CL-52-010.jpg  
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Old 03-05-2022, 01:39 PM
rjccjr rjccjr is offline
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CL-52 update

Hi All;

This session shows the value of dry fitting before you glue anything. The old layout board was discarded because it was too narrow. If the board is used to set out an ocean, the composition would be affected and wouldn't look right. The new board is wider and will give more room to work. The knots in the new board are not really a problem because they would be filled and painted over. By the way it is a habit to recycle sheets of card if the drawing isn't correct. Simply set it aside and use the unprinted side later. It saves a lot of card sheet. That's why there are some funny looking markings on the sheets. The four sections of the base plate were lined up on the center lined and connected together. Rather than gluing them down firmly, it is better to use a series of dots instead. That way everything is aligned, but the model can be removed easily if something goes seriously wrong. Once the base is dry, the first section of the vertical keel is glued in place and the forward bulkheads test fitted. You can see that number four doesn't look right. On looking back at the drawing, it was too short. The drawing was corrected, a new part cut and test fitted. It looks much better. Section two of the keel is now glued in place. It will be connected with a tab and ready for the next set of bulkheads. The centerline, bulkhead and tab locations are drawn on the base plates to insure that everything is aligned. Keel sections three and four are added and bulkheads inserted every six inches to keep everything lined up. The last bulkhead is also added because the end plate will be a difficult fit. The remaining bulkheads will be glued in place shortly. Right now it all seems pretty straight. Once the entire hull frame is up, the weather deck sections will be erdrawn, tested and the decision about the deck edges will be made.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-001.jpg   USS Juneau CL-52-004.jpg   USS Juneau CL-52-006.jpg   USS Juneau CL-52-007.jpg   USS Juneau CL-52-008.jpg  

USS Juneau CL-52-009.jpg  
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  #8  
Old 03-16-2022, 03:39 PM
rjccjr rjccjr is offline
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CL-52 update

Hi All;

No project ever goes right all the way along. Computers do strange things for no evident reason, at least this one does. The tremors don't help much. It doesn't take much to hit a wrong button. This time the dimensions for the main deck went out of scale and when they were test printed the length was nearly two inches short. So, the whole deck had to be redrawn. It took nearly two weeks, but it is almost there. The test fit is printed on paper simply to avoid wasting card. There are four segments and the joints from one section to another remain to be readjusted. This time I drew a ruler with one inch spacing between bulkheads and copied it onto each segment, in case the computer starts fooling around again. That way I can check everything with a real ruler. The ruler, by the way is graduated in tenths of an inch. It makes life a lot easier. Every location for each part of the ship is marked out to guarantee placement when it comes to testing deck houses and fittings. It will probably take about a week to get the joints exactly right before I can get to work on the side plates.

Regards rjccjr
Attached Thumbnails
USS Juneau CL-52-011.jpg   USS Juneau CL-52-013.jpg   USS Juneau CL-52-037.jpg   USS Juneau CL-52-038.jpg  
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  #9  
Old 03-16-2022, 07:14 PM
Golden Bear Golden Bear is offline
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Hi! It's great to see other folks designing and building their own models. 1:192 is a fairly large size for a model (to me) and I'm looking forward to the build and detailing!!!
Thank you for sharing.


Carl
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  #10  
Old 03-20-2022, 02:42 PM
rjccjr rjccjr is offline
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CL-52 update

Hi All;

The weather deck finally fits. It is correct for length and beam. It is printed on card now and being tested to confirm the fit. It will be glued in place when the side plates are tested. There is still need for adjustment of deck fittings, but that's a situation which will continue as the design evolves. The sections are drawn in plain white and colored views on each page. There is still no final decision of the color scheme at this early stage.When everything is correct only the colored sections will remain. Everything on the deck is drawn in to simplify the placement of structures as the design matures. The first of eight side plates is now under development. That is going to take a lot of dry fitting.

Regards, rjccjr
Attached Thumbnails
USS Juneau CL-52-054.jpg   USS Juneau CL-52-056.jpg   USS Juneau CL-52-3-new-mid-fwd-3-20-22.jpg   USS Juneau CL-52-side-1-3-20-22.jpg  
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