Source:http://ftr.wot-news.com/2014/01/05/t-54-model-1949-light-tank-variant/
来源↗

Source: narod2.ru via Slakrrr (US forums)
真·来源↗ 

Hello everyone,
大家嚎， 

what we have here is a quite interesting thing. Some of you (with very good memory) might remember one interview with SerB for the Goha.ru portal from more than two years ago (you can check it here), where – while discussing potential light tanks – he mentioned an ultra-lightweight variant of the T-54 tank a potential hightier candidate for World of Tanks. I’ve seen this interview before several times, but I honestly never found anything about this special T-54 variant, until it showed up on US forums today. It’s pretty interesting actually. Here’s what we know about it.
摆在我们面前的是个很有意思的东西。你们中的一部分人（前提是脑子要够好）也许还记得Goha.ru论坛在两年前对SerB进行的一次采访（点我去看） 当他们讨论到可能会出现的轻坦时—他提到了一个可以塞进WOT的超级轻量版的T-54变种，可以拿来做高级车的候选车辆。我自己以前曾经多次的看过这篇采访，但是说实话我从来就没找到过什么有趣的关于这辆特殊的T-54变种的信息。直到今天，它出现在了美服论坛上。还是挺有意思的，以下正文。

The article states that there was some testing of various types of tracks for T-54 tanks around 1949. At the same time, in May 1945, the design bureau of Plant No.183 (Kharkov) designed a light variant of the T-54 tank with improved terrain passability compared to the production T-54 model. This light variant could serve during special operations, where passability, speed and agility were needed more than superior armor protection. In order to achieve that, this light variant had wider tracks (580mm).
文章表示在1949年左右曾经有过一些基于T-54坦克的不同履带的实验。同时在1945年的5月，183号工厂的设计局（哈尔科夫）设计了一种跨越地形能力相比于量产型T-54更强的基于T-54的轻坦。鉴于这个轻坦版的地形通过能力，速度以及机动比优秀的防护更加重要，它可以在进行特殊行动时服役。为了达到这个目标，这辆轻坦的履带更宽了（580mm）

Both tanks were to use the same components, so the lighter variant could be easily produced by the plant in parallel with the original vehicle. The only things different were the hull and the turret, both having reduced level of protection, but kept the original shape (armor angles and such) of the production model. Final drives were also subjected to some small technical changes.
两辆坦克的部件都是一样的。所以轻坦版可以在已经在生产常规T-54的工厂里同时进行生产。唯一的不同点就是车身和炮塔，它们两个的防护能力都降低了，但是保持了原来的制作模型（装甲角度之类的）形状。最终的传动系统也被要求进行小的技术上的改动。

This is how they planned the vehicle to look from front:
以下是这辆坦克正面看上去的样子（计划图） 

Armor schematics of the light vehicle (1949):
轻坦版的侧面的装甲分部图（1949） 

The armor was changed as such:
装甲按照下列数据进行了改动 

– upper frontal plate (60 degrees) from 120mm to 80mm (240mm EFF to 160mm EFF)
正面首上（60度）从120mm降低至80mm（等效从240mm降到160mm）

– lower frontal plate (55 degrees) from 120mm to 80mm (209mm EFF to 139mm EFF)
正面首下（55度）从120mm降低至80mm（等效从209mm降到139mm） 

– hull side (0 degrees) from 80mm to 60mm
车身侧面（0度）从80mm降到60mm

– upper rear armor from 45mm to 20mm
后方上部装甲从45mm降低到20mm

– lower rear armor from 30mm to 15mm
后方下部装甲从30mm降低到15mm

– frontal hull roof from 30mm to 20mm
车身前半部分天花板从30mm砍到20mm

– rear hull roof from 20mm to 15mm
车身后部天花板从20mm砍到15mm 

The suspension was slightly changed. Original T-54 suspension on the right, lighter on the left:
悬挂系统也有轻微的改动。原版T-54的悬挂在右边，轻坦版的在左边 

The turret shape was modified to remove the frontal shot trap. Its frontal armor was also reduced from (T-54) 200mm to 180mm, the sides were reduced from 160mm to 120mm, the turret roof from 30mm to 20mm and the rear from 65mm to 60mm. The roadwheels were also to be a bit smaller (810mm diameter reduced to 790mm), torsion bars were also thinner (52mm to 42mm diameter) and the tank of course was lighter. Its weight was projected 31 tons. It was to armed with the D-10T 100mm gun, the power-to-weight ration was to be 16,8hp/t (using the 520hp T-54 engine) and its maximum speed was to be 58,7 km/h.
炮塔形状也同时被改动以移除正面的窝弹区。它的正面装甲也从（原版T-54）的200mm下降到了180mm，两侧从160mm下降至120mm，炮塔天花板从30mm降低到20mm，后面从65mm降到了60mm。负重轮也变小了一点（从810mm的直径降低到790mm），扭杆也更细了（从直径52mm降低到42mm），所以坦克本身自然而然的就轻下来了。它的预计重量在31吨左右。它所用的主炮是D-10T 100mm主炮，推重比是16.8（使用的是520马力的T-54引擎），设计极速是58.7km/h

This vehicle was, according to its designers, to solve tactical problems where using regular T-54 tanks was not practical. Note that the Chinese actually went even further and reduced not only the armor, but also the size of the original tanks, creating the Type 62 by miniaturizing Type 59. That happened of course more than a decade later. Apparently, this project never progressed past the drawing board stage.
根据设计师们的说法，这辆坦克是要来解决在战术方面使用T-54并不实用的问题的。要注意的是中国人在此之上更进了一步，不仅砍掉了装甲，还把原来坦克的尺寸砍掉了，通过把59式缩小制造出了62式。当然这又是在很久以后发生的事了。这辆坦克从来就没有突破只存在于纸上这个阶段……

So, what do you think? Could this be the tier 8 Soviet light tank? 175mm penetration gun sounds sufficient, maybe the armor would be a bit OP…
所以你觉得呢？这辆会是8级苏联轻坦吗？175mm穿深的主炮听起来好像还够用，装甲也许稍微OP了点……