FCM F1 — The Ultimate French Superheavy

cries in french

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Added a few fresh blueprints mostly regarding tank hull interior and measurements, but also the armor model you can see on both hull+turret blueprint.
Check the Updated note for additional info I already found out

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Now that’s new material to work with. The kind of things that can actually make a difference. Thank you for your work.

not mine, the author is credited anyway

The hardest probleme is the 90mm not having ap, but i think that war thunde could do like they did with the e-100 (in a similar fashion )which is a little bit of inventing, and mouth the 105 mle 1936 which is a field gun (which was a considered armament) instead of the naval gun, cuz i dont think that they should even add with the 90mm as it wouldnt be doing it justice in a tank only game like war thunder

It almost certainly had/would have had an AP shell developed since the 90mm was meant to penetrate German bunkers with heavy AP rounds like the Tortoise and the T95 since an HE shell at those low calibers wont do much to bunkers. Seeing that France adopted the 90mm caliber for their tanks immediately after ww2 i think it wouldn’t be that far fetched to just copy the PCO-50 90mm AP shell and give it to the FCM F1 and recalculate its velocity for the DCA Mle.1926.

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Adding this tank to the game would be the greatest event ever!! Developers, please add it to the game!

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I love this tank ! But I am a bit worried by the effectiveness of the 90mm 1926 gun using only explosive ammo. I am sure it will be like the AuF1, at a high BR but with only explosive ammo doing nothing against armored vehicles. But I still want it at 100% to see it. AND AND AND… Follow my logic :
The ARL 44 uses a 90 mm SA mle. 1945 gun. The 90 mm SA mle. 1945 gun is a derivative of the 90 mm mod. 1939 gun, and the 90 mm mod. 1939 gun is a derivative of the 90 mm Mle 1926 (you see where it is going). The differences seems to be the length of the barrel, the fixations and the gun muzzle.
Do you think there is a world where the gun of the FCM F1 can fire the same shells the gun of the ARL44, as, at the origin, it is the same gun with what is appears to be the same breach and the same tube ?

The gun did have an AP round developed for it during WW2. Figures on it have recently been obtained from archival finds, which OP is aware of. He just hasn’t edited the post yet to include them. He was concerned that Gajin would use the AP round (which has decent performance when plugged into the calculator) to justify putting the FCM F1 at a BR where its armor no longer works.

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I mean it has KV-220 levels of armour so unless it’s put to like 6.7 (which it obviously wouldnt) it would still work.

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With 90mm AP I see it as 5.3-5.7 material, where it would suffer due to lack of speed. Turrets would be huge weakspots, with just 100mm of armor, penetrable by most TDs starting from 2.0 (rarer examples with 1.3). And Fourche still hasn’t provided me the full info on the shell, I only saw some side talks about it. However I was doing research with some other fellas and the incendiary naval 90mm shell may have been appropriate AP analogue - essentially armor piercing shell with incendiary head, like 37mm armor piercing shells were. So we have two options on sight, except I haven’t seen proper info on any of them.

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I mean it depends what the shell would look like in game but I think its armour would be still good for like 5.0-5.3. The turrets are flat but also have the same armour on the sides so they can be very well angled. Also 24 kph is not that slow vehicle such as this, I mean it is better than something like black prince or churchill VII and dont forget it would be pretty much impossible to oneshot it.

But in the end it’s hard to guess when we dont know the shell performance. Also is there any info about its gun elevation/traverse speed and reload time?

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+1 as long as it gets AP for the big gun. Otherwise, might be awful.

+1 for the mega goober

Here’s the fabled AP round. It’s an 11.2 kg APCBC round designated 90-40-1.

Depending on which 90 mm the FCM F1 gets (since 3 different 90 mm guns were considered), the velocity could be 750 m/s or 820 m/s. This yields 165 mm and 187 mm of penetration respectively in the DeMarre calculator.

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We have found the holy grail of information

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+1 for sure.

I wonder what is explosive filler as it plays a fairly significant role in what pen the round might have.

Otherwise gun’s performance gonna be comparable to that of American 90mm, which is wild for a tank like… this

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According to the blueprint this APCBC uses the same shell as the HE shot we already have all the data on (And which is already in game). Note the line of vertical text to the left of the centre of the full shell blueprint on the left page:

Montage de l’obus explosif en acier de le 90 mle 1939

Which translates to:

Assembly of the 90mm steel explosive shell mle 1939

Now I am no expert on artillery metallurgy but it seems like this APCBC is quite literally the HE shell but with an added armour piercing cap (and ballistic cap).

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Yeah, I saw that too.

However, what we have in-game is model 1925 HE shell (I haven’t fiund a vessel with 90mm cannon more modern than model 1926).

Idk if the one we have in-game is the same as model 1939, but if it is indeed so, I wonder what should be the penetration value for it. If it is modeled after the one we have, it should have 906g of TNT and a penetration of 123-140mm point blank, which is bonkers considering the filling being able to overpressure practically anywhere if round succeeds to go through most of the armor.

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The only difference between the Mle 1926 and the Mle 1939 is that the latter had a barrel that was 1m shorter. There are no differences in the shells used as far as I could find.

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