Chung-Tzu Profile picture
Jun 11 15 tweets 7 min read Twitter logo Read on Twitter
(1/14) Many of you are probably familiar with the fact that the Soviets used autoloaders on their late-Cold War tanks.

Today I only really want to talk about something special about the T-64's (and T-80B's) autoloader that is mostly ignored. But first, some background... Image
(2/14) Some of you may also know that the T-64/80 and T-72 families use different basic autoloader designs.

The T-64's (left) is known in Russian as the механизм заряжания ('loading mechanism', MZ), while the T-72's (right) is the автомат заряжания ('automatic loader', AZ). ImageImage
(3/14) I won't get into the reasons/justifications why these tanks ended up using different autoloaders, (long story short: rivalry between the Kharkov and Ural design teams/factories), but let's take a closer look at some of the MZ control panels. Image
(4/14) In particular, note these switches on the T-64A (left) and T-64B (right) gunner control panels for the MZ. They are labelled 'СЕРИЯ' ('SERIES'). ImageImage
(5/14) When turned on, these buttons activate the 'series' working mode for the MZ autoloader. Image
(6/14) Ordinarily, for both the MZ and AZ autoloaders, you must press a button to tell the autoloader to load the next round, as shown in this Switchology video for the T-72M1.

(7/14) However, tanks with the MZ autoloader, like the T-64 and T-80, can activate 'series' mode, where the autoloader will automatically load the next round of the selected type (APFSDS/HE-Frag/HEAT) without the gunner's intervention. Image
(8/14) This means that if you stow your rounds together in type groups, you can obtain the fastest possible reloading time of the MZ autoloader (6 s), since the autoloader only has to rotate to the round immediately next to the one just fired, until that type runs out. Image
(9/14) Note that on the T-64B and T-80B, this mode cannot be used with the 9M112 Kobra gun-launched ATGM, but this is irrelevant today since Ukraine no longer uses the Kobra. ImageImage
(10/14) This 'series' mode is not present on any of the T-72s (T-72B shown left) or the T-80U (right) or T-80UD. ImageImage
(11/14) The 'series' mode, along with the superior 1A33 Ob fire control system compared to contemporary T-72s' TPD-K1 or 1A40 semi-automated FCS, allows T-64s to outshoot and out-reload contemporary T-72s (modern T-72B3s have a superior FCS).

rusi.org/explore-our-re… Image
(12/14) The 1st Tank Brigade in Chernihiv faced the 41st Combined Arms Army and elements of the 90th Tank Division, which at the beginning of the war was exclusively equipped with T-72s ranging from ancient T-72As to T-72B3s.

gurkhan.blogspot.com/2021/09/c-2021…
(13/14) The T-72's AZ cyclogram gives it a reload of ~7.7 s. If the next round to be fired is next to the previous round, then this will reduce the time to about ~7–7.1 s. It may be longer depending on crew reaction, since a button push is needed.

thesovietarmourblog.blogspot.com/2015/05/t-72-s… Image
(14/14) So, even though it's often claimed their rates of fire are similar, under certain configurations/mode of operations, the T-64 can have an edge. This is confirmed by crew testimony such as from Dominikanets, who has experience with both the T-72 and T-64. Image
(BONUS) Dominikanets has created an interesting document listing his opinions of both tanks.

dart-werther.livejournal.com/309465.html

I have made an English translation of it here:

docs.google.com/document/d/1yv…

He is also on YouTube: youtube.com/@asscold13

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More from @CalamineW

Jun 12
(1/17) I wrote earlier about the tracks of the T-64 and how they contribute to the T-64's good cross-country performance in mud and snow, but they are only one part of the equation.

The other part is the road wheels. Image
(2/17) The T-64 uses small-diameter narrow road wheels made mostly out of steel (a basic fact that some books like this 2022 one cannot even be bothered to fact-check). These have internal rubber shock absorbers (24). ImageImage
(3/17) This puts it in stark contrast with every other post-war Soviet medium or main battle tank since the T-34, which use large-diameter stamped aluminum alloy road wheels with external rubber tires.

Left is for the T-72, right is for the T-80B. ImageImage
Read 18 tweets
Jun 10
(1/16) When I did my first thread on the T-64, I mentioned that it is an oft-misunderstood tank. So, let's look at one of these oft-misunderstood aspects: its turret armour. Image
(2/16) Various books in English have gotten it wrong. Often seems to be the result of confusion, because different configurations were tried on the T-64s before 1974.

The first one was published in 2014, so maybe just outdated info, but the latter was published in 2022! ImageImage
(3/16) The development of the T-64's turret was a complicated affair. The best history in English on it is @AndreiBtvt's article on Warspot, which was translated into English by @Tank_Archives.

tankarchives.ca/2022/04/balls-…
Read 17 tweets
Jun 9
(1/16) For a change, today we will look a non-automotive special feature of the T-64A/B: its commander cupola and AAMG mounting. Image
(2/16) Unlike its rivals, the T-72 and T-80, the T-64A and later the T-64B received the remote controlled ZU-64A AAMG mounting with the 12.7 mm Utyos (NSVT) in 1974.

This allows the commander to fire it without exposing himself, as seen in this Georgian Legion video.
(3/16) The cupola and ZU-64A are controlled using two control panels: PG-20 (blue) and PV-20 (red) Image
Read 17 tweets
Jun 8
(1/16) Today, let's talk about something truly unique about the T-64 as far as tanks go: its tracks. Image
(2/16) @Chieftain_armor has an excellent video on the basics of tank track design, and I recommend watching it to understand some of the terms.

(3/16) The T-64 was the first Soviet tank to use double-pin tracks. They are also 'live' tracks, with rubber bushings on the track pins (right). ImageImage
Read 16 tweets
Jun 7
Having looked at the T-64's engine cooling system, now we move just a little over to its engine air intake and cleaning system... Image
Now, of course, like any internal combustion engine, the 5TDF needs air. And it doesn't like dusty air either, so it needs an air cleaning system too. Image
The first thing you'll notice are the flaps next to the intake. These are to deflect dust kicked up by the tracks next to the intake. They're unique to tanks with the 5TDF and 6TD engines due to the intake location, like the T-64, T-80UD, and T-84 (right). ImageImage
Read 21 tweets
Jun 6
Something I've thought of doing for a while, but as the summer heats up and Ukraine prepares to go on the attack, I'd like to to talk about some of the more unique features of the primary Ukrainian MBT, the oft-misunderstood T-64. Today, it will be the engine cooling system. Image
Like any internal combustion engine, the T-64's 5TDF 5-cylinder multifuel opposed-piston engine needs cooling, provided by a liquid coolant that circulates around the engine, which is then cooled by radiators. This is built into the upper deck of the engine compartment. ImageImageImage
However, unlike most tanks, including its eternal rival, the T-72 (left), and the older T-54/55 and T-62, the T-64's cooling system (right) doesn't use a cooling fan. ImageImage
Read 15 tweets

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