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Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Sun Apr 09, 2023 3:24 pm
by Iceman 29
....
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Mon Apr 10, 2023 12:06 am
by DrPR
Pascal,
Nice work!
However, I count four rectangular windows in the sides of the rear cabin in the picture, and you have five in your model. Maybe the rear (fifth) one is the window with the round port.
Phil
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Mon Apr 10, 2023 2:07 am
by Iceman 29
Yes, it�s � choie, I made a mix of the diagram and the picture, they are not exactly the same boat. I wanted to keep the ratio length / width of the windows.
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Tue Apr 11, 2023 3:59 am
by wefalck
I don't know about the French navy, but in Germany the navy looked on for a while how the merchant navy, particularly the fishing industry slowly developed and adopted small marine engines. The Danish and the Dutch were the avantgarde in marinising the petrol and in particularly the diesel engines. The latter in particularly proved difficult initially, as it required a high-pressure fuel-injection pump, compressor and compressed air cylinders to start and reverse. A Dutch gentleman named Brons came up with a sort of semi-diesel engine that was suitable for installation in small (fishing) boats. The other route were engines with a glow-cap that worked with lower compression.
Destillation products from crude oil were not yet widely available in the early years of the 20th century and the navies experimented with different fuels, also with a view to have control over their supply chains. Thus, engines running on alcohol (a 'biofuel' in the modern sense) seems to have been in use right to the end of WW1. Petroleum was used, but not very popular, due the soot formation in the engine and the strong smell. Benzol, a distillation product from coal-tar was common too. Petrol in the modern sense was not common until the years running up to WW1.
Some boats also used two types of fuel, something easier to ignite to start up the engine, particularly for the glow-cap engines, and when the engine was warmed up switched to heavier oils and even semi-liquid fuels with pre-heating of a reservoir to reduce viscosity.
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Tue Apr 11, 2023 4:40 pm
by Iceman 29
Tks Wefalck, I didn't know this development.
Photo of the Bretagne at anchor in 1915, we can clearly see this type of boat with the typical keel drop, but with 4 ports instead of 5, as I drew, and a fender on the bow.
Looking at the picture of the Bretagne 2 days before she sank, I noticed this still different canoe with a 3 ports cabin with a different line on the water, more modern, normal for the time (1940):
Addition of a deck girder between the two cabins
Drawing of the stairs and I stop here.
The launch boat fleet is complete.
I made a quick plan of the little 3,5 mts clinthed pram. The hull is 0,25 mm thick.

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Wed Apr 12, 2023 3:14 am
by wefalck
Interesting that the French navy used nordic 'prams'. What were they used for, for outboard paint jobs, like the British painting-punts?
What surprised me a bit in your design was, that you drew battens over the clinker-seams. Was it done this way in the French navy? Otherwise, it is not very common and technically not needed.
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Fri May 05, 2023 12:31 pm
by Fliger747
Speaking of Battleships, today is the Cuban Holiday "Sinko de Maino".
Back to the real world of model warship construction, this is quite a tour de force of printed technique and construction. As a beginner in this field, I can testify that considerable judgment and experience are necessary for Pascal to make it look easy!
Regards: Tom
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Sat Aug 05, 2023 4:18 pm
by Iceman 29
Thanks!
Work resumed on the Bretagne a few days ago.
I started drawing this battleship almost a year ago...
Painting of the dinghies is almost complete.
Installation of the stern railings is also almost complete.

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Tue Aug 08, 2023 3:35 pm
by Iceman 29
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Tue Aug 08, 2023 8:36 pm
by BB62vet
Excellent work, Pascal...Well Done!
Hank
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Wed Aug 09, 2023 6:03 am
by Iceman 29
Tks Hank!
I've had too many problems with elastic thread, it pulls a lot on the plastic masts, plus it's too straight, there's always a curve on a long cable, so it's not very realistic.
The advantage of stretched wire is that you can give it a shape, but it's very fragile.
But my models are in display cases whenever possible (the size of the ship). This prevents admirers from touching them, which is almost always the case... Like the children we always are...
I now systematically warn people when I have visitors, explaining that even I break things when I handle the model being assembled with a thousand precautions.
I've found some metric draught scales, I'll see if I like them, if I don't I'll do something else, I'm not a fan of decals...
They also exist in black.
https://www.modelbouwshopnederland.nl/e ... escription

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Thu Aug 10, 2023 4:39 pm
by Iceman 29
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Fri Aug 11, 2023 1:28 am
by wefalck
Looking very good!
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Sat Aug 12, 2023 11:52 am
by setori
trop beau !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Sun Aug 13, 2023 5:51 pm
by MartinJQuinn
Magnificent work!
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Mon Aug 14, 2023 5:44 am
by Iceman 29
setori wrote:trop beau !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Merci � toi! Je suis avec attention ton projet.
Tks Martin and Welalck

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Mon Aug 14, 2023 5:14 pm
by Iceman 29
The forecastle is almost finished.
I've fitted the railing and the masts for the sun awning. Quite a few other accessories on the port side too.
The rigging is tricky to fit on the masts. It has to be lazy and taut without distorting the masts.
These masts are curved at the top, which wasn't always the case, especially when the ship was launched. On the Courbet class, they are straight, for example. I prefer this version, as seen in 1916, which is more elegant, and also allows the canvas to overhang the planking, so there's less rain/sun on the deck?
I've still got the droppable anchor chain fittings to fit. It secures the anchors to the sea.
You can see the port anchor in this photo, disconnected from the chain, the ship is at anchor here (on the roadstead, no natural deep-water port at Saint-Quai), the port anchor is ready to anchor in case of a problem, you can see its chain swivel indicating that it is in the up position:
The masts in question:
Advances:

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Tue Aug 15, 2023 1:51 am
by wefalck
How thick/thin are these awning-stanchions? They must be incredibly flimsy and break easily!
I shied away from showing them on my current project, claiming that they were stowed when under way. I still have to make them and 'stow' them, but there they will be a lot less vulnerable to bending or breaking.
Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Wed Aug 16, 2023 3:20 am
by Iceman 29
0.6 to 0.4 mm , it's conical.
I don't UV-treat parts any more, so they stay supple and less brittle.
There were two types of Blast bag on the 340 mm guns of the Bretagne battleship: the "square" skeleton later found on the Richelieu, which of course has many more folds, and the oval following the opening for the turret gun.
The modification may have been made during the 1st redesign, when the 340 guns were raised from 12� to 18� to increase their range in 1919.
I've shown the 1916 oval version.
The "square" Blast bag model:
Without Blast bag:
Oval Blast bag :
Here on the Battleship Provence:
1915-16:
Two of my favorite reference photos that I use all the time for what I want to represent in 1916. These two photos are probably very close in time, but we can see small differences in maturity, as a warship is in perpetual transformation.
Little progress yesterday:

Re: ? Battleship Bretagne - France - Design & 3D printing 1:
Posted: Fri Aug 18, 2023 5:32 pm
by Iceman 29
The white may need to be toned down further.
Evolution of the position of the forward draft scale:
Aft and forward draught, 1915:
Here it clearly reads 98 and above 100, i.e. 9m80 and 10 meters, which is consistent;
Technical specifications
Length 166 m
Main beam 27 m
Draught 9.80 m (full load probably, coal, water, oil, ammunition)
1915
After recasting, the forward draft scale is moved aft of the port anchor. No photo for starboard.
1926
1929
I can't conceive of assembling a ship without taking a close interest in its history.
It's often fascinating
I've received the vinyl decals, and they're not bad. I reinforced the gluing with extra fluid glue, which I apply after gluing around the vinyl. But it'll be varnished later anyway.
I "rusted" the numbers. White is too white. But pictures increase the white effect.
