The Ship Model Forum

Plans/blueprints for many US Navy small boats are available from the Barbour Boat Works Inc. records (#758) at the J. Y. Joyner Library at East Carolina University, Greenville, North Carolina, USA.

https://digital.lib.ecu.edu/11208#?c=0& ... 570%2C3500

Barbour Boat Works built everything from motor whale boats to destroyers. They made virtually every type of boat the US Navy used during and after WWII.

Phil
(www.okieboat.com)

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A collision at sea will ruin your entire day. Aristotle

Thanks Phil for the links and your 3D drawings, vert helpfull, nice job.

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

Paint job on the utility boat, portside hull, weathering will follow:

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

This is my method of applying the different colors, dazzle is not an easy sheme to do. The bottom is covered with black boot top and the bottom with USN anti-fouling red as a final touch.

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

The wedge shaped boot top is much more exaggerated in comparison to the Iowa's which had this in a minor way. Some APA models have had all black below the water line. From snooping about enough I settled on a very broad boot top with anti fouling red below. Those ships were fairly evenly load balanced compared to the tankers. The above photo in B&W appears to have no boot top and red. By estimating color from B&W photos is risky. To my old timey photographers eye (not admissible in court) that look like red anti fouling with an orange or yellow filter as might have been used with panchromatic film of the era to cut the haze and enhance contrast.

Whatever Pascal comes up with will be well researched and insightful and his best thoughts on the matter.

Cheers: Tom

I think I will adopt this scheme with boot top a bit lower:

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

Don't make the boot topping too low, or narrow. Look at the attached image. Tankers rode low in the water when full, but very high when empty.

Phil

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A collision at sea will ruin your entire day. Aristotle

Yes, but in 1944-1945 with dazzle camouflage the boot topping was low, Specifically in my case, precisely so as not to disturb the scheme Mesure 32 and not to see too much of the antifouling red paint.

USS Pamanset:



Some exemples of Dazzle schemes:

Excellent site:
http://www.usndazzle.com







Pamanset AO-85:

Mesure 32 - 3AO



We can even deduce the exact height where the Boot topping starts, at 21 feet ( 6,40 meters ) of draft:

To 1:200 : 0.105 feet (1 17/64 inch), 32 mm.

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

Fabrication of the central deck piping, 3D printing instead of Evergreen at the front.

The valve handwheel, flanges, are very well taken out, draw to a diameter of 0.25 mm for the handwheel torus, layer of 30 microns with my new printer Photon Mono X. Really top.

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

During WWII it was required that Captain's of carriers be Naval Aviators. This was a bit of a problem as they hadn't come up through the ranks as Captain's of smaller ships. The more junior aviation officers pushed hard for this to open a promotion line. There were a number of "Johny Come Lately" senior officers took aviation training to qualify. However for the "real" aviators they needed command of a deep draft ship and were usually sent to Captain a tanker. Such luminaries as "Jocko" Clark went this route. I can see where this would be a real "makee learn" experience. For successful Carrier Captains, the route to flag rank was opened.

Pascal,

From the camouflage drawings you posted I would have to agree with you. The WWII dazzle scheme didn't carry the boot topping as high as in the photo I posted.

Also, the picture I posted was of the 12,840 ton USS Passumpsic AO 107, a "jumboized" Cimmaron class fleet oiler, commissioned in 1946. It was 644 feet long with a 75 foot beam, quite a bit larger than the 5,782 ton 523x68 foot Pamanset. With the extra tank space the Passumpsic would float a bit higher when dry.

Very nice work on the Pamanset! I may have to get one of those printers!!

Phil

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A collision at sea will ruin your entire day. Aristotle

At the time tankers were not double hulls, the first double hulls were built quite recently in the 1980s.

So to ballast, the cargo tanks were filled with sea water, the minimum if possible, there was a minimum draught to be respected for the ship to sail in good conditions.



The amount of sea water loaded depended on the weather we would find on our way. On the picture you posted, no problem, the weather is nice and the sea is calm, so little ballast.

Loading a heavy ballast meant loading more tanks with sea water. Some tanks could not be ballasted because some products such as kerosene for airplanes can't withstand water in general, the water settles with difficulty from this product and remains in suspension more or less according to its quality of manufacture. In spite of the very special and expensive filters used before loading an airplane tank, water can pass through and it can be catastrophic during high altitude flights because of the cold, the water freezes and little blocked pipes because of ice crystals.

For DO (Diesel Oil), HFO (Heavy Fuel 380 & 750 cst) or MoGas (Motor Gasoline), it is much less than for the AvJet, which is very sensitive.

The choice of the tanks was thus very important, empty ship, according to what one was going to reload afterwards.

It should be noted that sea water mixed with the rest of the hydrocarbons present in the tanks accelerates the corrosion of the tanks, especially with the Mogas.

Several major disasters have led to shipwrecks, including ..

Torrey Canyon 1967 UK
https://www.bbc.com/news/uk-england-39223308

Amoco Cadiz 1978 France
https://wwz.cedre.fr/en/Resources/Spill ... moco-Cadiz

Tanio 1980 France

Exxon Valdez in 1989, Alaska
https://www.youtube.com/watch?v=VaRdUHrUnBs

Erika 1999, France
https://www.youtube.com/watch?v=Qi15Axa0wq0

Prestige 2002, Spain, Portugal, France.
https://www.youtube.com/watch?v=ch1fu5XpKVs

and many others,

...have signed the death warrant for the use of single-hull vessels in Europe and USA.

Under pressure from the United States, the International Maritime Organization (IMO) makes double hulls mandatory under the Marpol 73/78 convention. Single-hull oil tankers will be banned in 2015 in Europe.

Double-hulled ships ballast in the double hull, which prevents oil discharges into the sea and better prevents collisions between ships or leaks following grounding. The condition of the double hull can also be better monitored but also difficult to maintain.

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

David,

Thanks. I was aware of that. The photo I posted was off Vietnam in the early 1970s.

Phil

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A collision at sea will ruin your entire day. Aristotle

Yes a little surprising that single hull tankers were used civilly as late as they were. the "X-ON" Valdez incident is very familiar to me as I was flying C-130's in Alaska at the time and we flew boom material from Frobisher Bay to Valdez (it came from UK) and then tested a spray boom for dispersant (but wasn't used). During Halsey's Typhoon the three Destroyers that were lost had a reluctance to ballast with sea water as a stability factor resulting in their loss. When you look at some of the tankers riding empty you can see where in a wind they might make considerable leeway and not answer well to helm. I don't know, but suspect bunker fuel might be less miscable in water than more modern distillates.

Feeding the great blue fleet during the Pacific drive there were never enough tankers. The Cimmaron converted escort carriers were quite prized, not only for their aviation capability, but they retained their utility to some extent as a vital part of the fleet train.

Cheers: Tom

Tks Tom for the informations.

Sailing on Ballast also was real problem for empty Liberty ship returning to USA after discharging in UK crossing north Atlantic, i think.
Brokenness due to new welding processes and the steel used during the war and in general to the design of ship hulls. The story will be repeated later with the VLCC Very Large Crude Carrier.

Interesting site: http://www.shippai.org/fkd/en/cfen/CB1011020.html

December 1943, North Atlantic:


One of the ships (LPG Gas Carrier of 35000 m3) on which I sailed 3 years, here in December 2002 in the North Atlantic, coming from Korea and having transited through the Suez Canal to Holland.

The ship became ungovernable some time later and will have to come downwind.

https://www.youtube.com/watch?v=R1rvandK7eM


More than 40 degrés on portside recorded.. Hot!

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

Forty degrees is a pretty good roll, interesting that the clinometer stops at 45! During wartime there was always an acceptable loss rate built into the calculations. Surprisingly with the welding (welding is an art that requires experience and training) a contributing factor was the close spacing of the frames, this resulted in a stiff hull and increasing the frame spacing made the structure more flexible and distributed stresses better. Metalurgy is always a critical consideration. The Japanese attempted to build a DB 601 using German blueprints but did not have good operational success due to lack of critical elements needed in the steel and alloys.

In the aircraft I have flown fatigue lifespan is a critical attribute. During WWII, for fighters it was not really a consideration as the aircraft would (1) be expended or (2) become obsolete within a short time.

So if most ( a simple majority?) of the ships got to where they were going, it was considered an operational success...

Regards: Tom

Now I know why I was Army

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Bob


On the blocks
1/72 HMAS Gympie
1/72 HMAS Darwin

I printed pulleys today, which would not have been possible with the other printer at least as accurately.

Printed some new mast booms, the others were too long, this picture helped me a lot to know the exact length.



I printed new higher fittings to raise the load masts a bit low because of the storage platforms.

I can pass the wires directly into the sheave without having to drill the pulleys again, a big printing improvement!













I couldn't resist reprinting two utility boats with the new printer. Although I had finished one completely with its support, paint and weathering...



They are much better of course. I'm going to put two. But that's not the only reason, because I realized that the scale of the first ones was not good, when Chitubox printed them, the size increased by about 10%, I hadn't measured the first utility boats printed, until I printed another one with the other printer, it's by putting them side by side that I realized this "bug" ... I still haven't found the reason.



Manufacture of the forward platforms:

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ

I communicate back and forth with Russian friends using a translator program, which works surprisingly well, but I can tell from the occasional odd usage in what I receive that what I send undoubtedly has some oddities exported.

The 40' motor launches do appear to have been printed horizontally and one can see the effect of the better resolution in the smoother decking. The larger one one can see what I take is lines from the layers? Maybe I will get my resin next week? Will be fun to begin by making some fiddly bits.

I hadn't rechecked my text, it was late... A long day..

The best, i think, contextual, and free:

https://www.deepl.com

This layer effect can be reduced with the antialiasing setting, sometimes to the detriment of the fineness of the details.

https://www.youtube.com/watch?v=2_kkBO1jmZA

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Pascal

•Battleship Bretagne 3D: https://vu.fr/FvCY
•SS Delphine 3D: https://vu.fr/NeuO
•SS Nomadic 3D: https://vu.fr/tAyL
•USS Nokomis 3D: https://vu.fr/kntC
•USS Pamanset 3D: https://vu.fr/jXGQ