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Battleship Bretagne - France - 3D realisation - 1:200 scale


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I don't know the date of this picture and which sistership.

 

I think the guns were replaced/modernized as they were refitted or the plan is not good.

I drew these guns according to a plan dated 1915.

 

Since then I have received other plans with a different shape at the muzzle of the gun, more modern.

I will probably modify the 3D drawing, it's quite simple.

 

Base of my drawing:

Dated 1915:

Bretagne

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Dated 1916:

Sistership Provence

 

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Not much to present, yesterday was a very complicated and time consuming day for digging the hull at the front because of the integrated hawse pipe in the hull. The front part is well advanced.

 

I can now drill the portholes. 

 

Drawing of the small deck accessories.

 

Tomorrow, I'll take over the SS Delphine project, alternately, for one week. :)

 

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Drawing of the anchor chains just for the drawing, but I'm also thinking of printing some. The shape of the forestay mesh is rather oval, I drew them a bit big, to be reduced. 

 

Drilling of the starboard portholes, port is a little different. 

 

The door you see under the waterline is the door of the starboard front torpedo tube. There are 4 of them. 2 forward and 2 aft.

 

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Some accessories added on the foredeck on Sunday. 

 

The third windlass has no clutch, the lowering protections to the windlass chain wells for the sea packs, sheaves for maneuvering the anchor fouled by the arm (make a turn of chain around a leg of the anchor), I have others to draw double for the front cables of the anti-torpedo nets, the front fairleads (The model varies between the plan and the photos), the flagpole that very specific to leave free the fairlead of towing, it supports the removable anchor light.

 

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On 08/08/2022 at 12:08, Micha_Pol said:

French Battleship are very unique, so seing one take shape is great. Read about it in the book "French Battleships of WWI" by Jordan/Caresse.

 

 

To complete my documentation, I bought this book from 2017 that was highly recommended to me , there would be quite a few plans etc.. I should receive it tomorrow. 

 

I did not find the French edition that the description speaks of, but it does not matter.  Maybe this book is written in both languages, I would see.

 

"When the war broke out in August 1914, France had only two dreadnoughts in service, and a second pair being tested. The main body of the elite Arm e Navale consisted of the eleven battleships of the _Patrie_ and _Danton_ classes, both of intermediate design with two main gun calibers. Among the older ships were the survivors of the famous _Flotte d'échantillons_ of the 1890 program and their successors designed in the 1890s. This book traces the development of French battleships from 1890 to 1922, and also covers the significant modifications made to the survivors during the interwar period. 

 

The structure of the book follows that of previous books in this best-selling series, with John Jordan's first part devoted to the design, followed by Philippe Caresse's historical chapters covering the years 1900 to 1945. The book is profusely illustrated with line drawings and labeled diagrams, as well as photographs from Caresse's extensive collection, many of which are previously unpublished."

 

https://www.amazon.fr/gp/product/1848322542/ref=ppx_yo_dt_b_asin_image_o01_s00?ie=UTF8&psc=1

 

9781848322547-us.jpg 

 

This is the most comprehensive book on these ships published in either English or French, and is destined to be the reference for many years to come.

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On 12/08/2022 at 13:14, Iceman 29 said:

This is a "Normal" phenomenon, because during the diffusion of UVs through the pixels of the LCD screen, the UVs diffuse a little at the periphery in the resin. This makes the part a bit oversized.

For a simple part no problem. But for a part that has to be assembled to another one, it's a problem, on both parts

Thanks for the explanation - now you explain it like that it makes perfect sense and would explain why the spigots I printed to join HECLA's two hull halves together failed 😭

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  • 2 weeks later...

I continued to draw the hull, the 47 mm gun, the deck plates. I'm halfway through the hull, at 10 out of 20.

 

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The hull is well advanced. As usual, some defects have to be corrected after finishing the blocks, but it's not too bad. Some mistakes on the drawing of the rear couples, the same drawing of the Lorraine is more accurate. When you put the two drawings on top of each other, there are a lot of differences in the drawings...  


Yet they are theoretically the same hulls. The propeller shafts are not placed at the same places etc. So be careful when using the 3 sets of plans.

 

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Lorraine:

 

Screenshot-2022-09-02-17-08-25-009.jpg

 

Bretagne:

 

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Drawings of the propeller shaft lines.

 

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Inserting the layer with the perfectly fitting plane in Fusion360.

 

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Drawing the propeller shaft line axes, in magenta at the bottom, I'm only doing one side of course, it's symmetrical.

 

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Once this is drawn, I use the detailed plan of the starboard support to draw the bearing and the arms. The layer is of course positioned on a plane perpendicular to the shaft axis. 

 

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New arm profile layer, positioned perpendicular to the axis of the upper arm. The two arms do not have exactly the same profile, the upper one is thicker, maybe because it supports the weight of the shaft line and also of the heavy propeller.

 

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Drawing of the bearing, which seems to be lubricated with sea water, guaiac bearing?  Guaiac (ironwood) is a very hard, very heavy wood, with a density greater than 1, so it doesn't float, with a very high resistance to wear. On the propeller plane, if you look closely, the coded representation of this industrial design of the material used seems to correspond to wood.

 

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Drawing of the arm fixings.

 

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Projecting the sketch of the magenta bracket onto the hull, a multitude of 28mm diameter rivets attach this piece to the hull:

 

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The outer shaft line support still needs to be drawn, then it's time for the propellers.

 

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The conical part attached to the shaft is probably a zinc anode for galvanic protection. It is removable because it is made of two half-cones. It is fixed by bolts to each other. The form avoid the drag and turbulences.

 

Screenshot-2022-09-03-13-42-14-130.jpg

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@ Stuart

With these new generation 3D programs, it is much easier to approach this discipline. I'm completely closed to the programs I've tried.

After that it's a bit of self-training with the help of tutorials on Youtube, which are extremely well done.

There is no secret. You have to practice. Sometimes you have to go through moments of great solitude at the beginning. 

 

Of course you have to like drawing. 😜

 

The 4 propeller shaft lines are almost complete.

 

32756-EBE-23-D2-48-E8-A709-2-DE411-FF954

 

767-A70-C9-C450-4-A0-D-836-C-65-C6-A09-A

 

 

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Design of the propellers.

 

Their diameter is 3 meters, designed for speed. The propeller pitch is 2m54.

 

Although the Bretagne is not very powerful compared to what will be done later, 43000 hp, 21.5 knots. A French destroyer of the 50's is powered by 63000 hp, max speed 32 knots.

 

Luckily, I have quite complete plans for once (thanks Chris). Among other things, the plan of the blades (called wing on the plan), the sections at different heights, it's really easier to realize with this information.

 

You can also see on the plan, how the central nut is braked after tightening and how its flats are protected by a sleeve which comes to fit from above, closing the hub cone. The 3 screws that can be seen around are used to fix it. 

 

Nice work! 

 

The small screw on the cone of the nut is probably used to fill it with hot liquid tallow that will freeze in the cone later on, thus protecting the thread from corrosion and water ingress. It's just an hypothesis on my part, but it seems to me that it reads "filling with tallow" on the plan, technically, it makes sense.

 

I could use this propeller for other ships by transforming it into 3 or 4 blades depending on the model.

 

To make a left or right hand propeller, one click is enough.

 

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I'm going to redraw the rudder as I have the exact plan, I had drawn a head one which is not very accurate except for the profile which is.

 

Propellers in place:

 

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Pascal,

 

:worthy: I thought I could draw until I started reading your threads, incredible, it leaves me speechless, so much work is hidden in these posts

 

I'll follow if I may

 

Cheers

 

Steve

 

 

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WOW, I have seen your work before, it is mind blowing, I only touch the surface of 3D design in Rhino, but nothing to this level, I imagine you do this professionally, what package of software do you use

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New rudder design following the plan, it gave me a bit of trouble, quite complicated shapes:

 

All the layers of the cutting plan laid on their respective plan.

 

The rudder is 7 meter long.

 

Screenshot-2022-09-05-21-21-32-430.jpg

 

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On the right is the old rudder, much simpler.

 

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Thanks to Chris' plan, I was able to start drawing the famous Moissenet stopper. 

 

To my knowledge, there is no photo of this device. 

 

So we will discover little by little what it looks like in "virtuality" thanks to the magic of 3D, then in reality, once printed. :)

 

This morning I also studied the functioning of this stopper to better read the plan (which is not so simple) and to understand the drawing in good conditions.  

 

I'll talk about how it works with a little animation at the end of the drawing.

 

Battleship Liberté:

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Quote

Chris wrote:

;)

stoppe10.jpg

 

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I also enjoy this thread because I am learning about the design and construction considerations of dreadnought battleships. I have just realised, for example that the forecastle is considerably shorter than on an equivalent British ship of the period. I guess that is because of her being designed to work in the inshore seas such as the Mediterranean?

 

Will

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14 hours ago, Killingholme said:

I also enjoy this thread because I am learning about the design and construction considerations of dreadnought battleships. I have just realised, for example that the forecastle is considerably shorter than on an equivalent British ship of the period. I guess that is because of her being designed to work in the inshore seas such as the Mediterranean?

 

Will

 

Thanks Will, I don't know.. 🤨

 

The drawing of the stopper continued today a bit. 

 

The top gears and screws are in right-hand pitch on both sides, I'll rectify that later. 

 

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I didn't make much progress today, I wasn't at home.

 

Too sad, no direct access to this slide show.

https://imagesdefense.gouv.fr/fr/le-sto ... enet.html#

"This device is used when towing a large tonnage vessel and allows the operation to be made safer by braking or stopping the tow-roap , so that the personnel can control the speed at which the tow-roap is pulled.

After these generalities, the slide show moves on to the description of the stopper: its general diagram and its frame for attachment to the deck.

The next part is devoted to the operation of the stopper, the hawser spinning is explained by diagrams.

The last part is devoted to the use of the stopper, diagrams and commented photographs explain how to prepare and carry out a tow with the stopper.


Presented by the Navy's military schools.


Prepared by the Manoeuvre School."

 

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Hello Pascal,

 

despite your always fascinating  3D skills, i like the background information you are

providing to the interested modelers/readers! 

Thanks for the time you spend on it!

Regards

 

Andreas 

   

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