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Garupan History Profile picture
@GarupanH
Jul 29, 2024 • 6 tweets • 2 min read • Read on X
Scrolly
It was actually much easier to conduct transmission maintenance and repair on the Panther and Tiger II when compared to the Tiger I.

This is because removing the transmission on the Panther and Tiger II did not require the removal of the turret. Image
These tanks had a maintenance hatch above the crew compartment in the hull which can be opened to give access to the transmission.

Afterwards you just need to remove the radio equipment and then you could pull the transmission out of the tank with the help of a crane truck. Image
On the Tiger I heavy tank, the only way to take out the transmission was through the turret ring which is obviously only possible after you remove the turret from the hull. Image
The reason this is a problem is because the turret of the Tiger I weights 11 tons and lifting it off the hull for is mainly done using 16-ton capacity Strabokran gantry cranes. Image
There is a photo of a Tiger I turret being lifted up by a half-track and a truck equipped with 6-ton Bilstein cranes working together but this was probably very risky and was only done when a gantry crane wasn't available. Image
Tiger II maintenance hatch Image

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More from @GarupanH

Garupan History Profile picture
Oct 10, 2024
The Japan Steel Works 120mm L/44 smoothbore gun used by the STC-1 and the TKX-0002 prototypes of the Type 90 main battle tank actually had superior accuracy and higher armor penetration than the Rheinmetall 120mm smoothbore gun as proven during tests conducted by the JSDF in 1983 Image
The JSW 120mm smoothbore gun was based on an experimental 135mm smoothbore gun developed by Daikin Industries for the STC-1 prototype in 1979.

This massive 135mm gun had APFSDS ammunition capable of extremely high muzzle velocities exceeding 2,000 m/s. Image
However, the development of this 135mm cannon was soon cancelled due to the expensive costs of manufacturing the gun and its ammunition as well as the difficulty of handling its massive rounds. Image
Read 4 tweets
Garupan History Profile picture
Jul 29, 2024
The Hedgehog armor (Igelpanzerung) is a special roof armor used by the Panzerhaübitze 2000 155mm self-propelled gun and the Schützenpanzer Puma infantry fighting vehicle designed to defeat shaped charge cluster bombs which target the thin roof armor of tanks.


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Anti-tank cluster bombs deploy hundreds of shaped charge bomblets over armored vehicle formations and convoys.

These bomblets are very small in size but could penetrate over 100mm of armor, more than enough to pierce through the 20-40mm roof armor of modern main battle tanks. Image
The M77 bomblet you see here for example is only 38mm in diameter but could penetrate up to 200mm of steel armor. Image
Read 6 tweets
Garupan History Profile picture
Jul 26, 2024
Ever wonder why are the T-64 and the T-72's side skirts intended to be flipped open in combat?

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These are actually a special type of side skirts called "gill armor" which is designed to protect the tank's hull sides from shaped charge weapons.
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These are flipped open outwards to provide a much greater stand-off distance when hit by HEAT shells and anti-tank weapons within the 70° frontal arc of the tank. Image
A regular side skirt would only provide a stand-off distance of 2,650mm when hit by a shaped charge at a 30° angle but a flipped open skirt would provide 3,500mm. Image
Read 4 tweets
Garupan History Profile picture
Jul 7, 2024
I updated my Abrams turret composite armor illustrations based on the armor of the M1150 ABV and other information I got from some experts.

It turns out the only times the physical thickness of the turret armor was increased was on the M1A1 in 1985 and on the M1A2 SEPv3 in 2020. Image
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The downgraded composite armor of export Abrams models likely only reverted back to the original BRL-1 NERA arrays which used rubber.

However, the M1A1s sold to the Australians has the same third generation composite armor used by American Abrams tanks, just without the DU armor

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The original BRL-1 composite armor of the M1 Abrams was a rubber based Non-Explosive Reactive Armor developed by the Aberdeen Ballistics Research Laboratory.

The Abrams never used the British Chobham armor. Image
Read 4 tweets
Garupan History Profile picture
Jul 4, 2024
The Stillbrew armor of the Chieftain tank was actually very effective against APFSDS rounds

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Testing of the armor prototypes in 1985 showed that it can easily defeat the new L23 Tungsten alloy 120mm APFSDS round of the Challenger 1 even at a distance of just 1,000 meters.

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At that distance, the L23 APFSDS can penetrate 455mm of rolled homogeneous steel armor.

They also tested the Stillbrew against the 3BK-14 125mm HEAT-FS shell which can penetrate 450mm and the armor was also able to defeat it.

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Stillbrew Armor:

~460mm vs APFSDS
~500mm vs HEAT


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This means that Chieftain tanks equipped with the Stillbrew had superior KE protection over the new Challenger 1 tanks with the Chobham armor.

However, the Stillbrew was only added on the turret of the Chieftain and the hull remained to be very vulnerable to more modern threats.


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Read 4 tweets
Garupan History Profile picture
Jun 30, 2024
The hull composite armor of the T-14 Armata is actually only ~650mm thick and mainly consisted of three steel armor plates sloped at 40°

However, it also uses special Silicon Carbide nanoceramic armor inserts which can be equal to almost 200% of steel armor against APFSDS rounds
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Nanoceramic armor achieves this higher effectiveness by having more compact nano scale grains which makes them up to 70% harder than conventional ceramics.


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Its been public knowledge that the T-14 Armata used nanoceramic armor ever since it was revealed back in 2015 but the actual thickness of the armor and how they were arranged only became known very recently.


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Read 4 tweets

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