In this article series, you ask me questions, and I answer them! Email your questions to tankarchives@gmail.com, and I’ll answer them here (as long as they’re within scope, of course).
Q: What was the highest caliber gun mounted on a tank (not artillery or tank destroyer)?
问：一台坦克上安装过的口径最大的炮是多少？（不算火炮和TD）
A: Off the top of my head, the KV-2′s 152 mm howitzer was the biggest, but that was practically an SPG anyway.
答：我记得KV-2的152MM榴弹炮是最大的了，不过那个怎么说都要算成火炮了吧。
Q: Were there German plans for autoloading tanks?
问：德国人有过打算做弹夹炮坦克的计划咩？
A: The T-25 was supposed to have an auto-loader. SerB says that the Waffentrager E-100 was, too. Aside from that, no idea, but there were probably some obscure autoloader projects.
答：T-25本来计划是要有弹夹炮的。SerB说 weapons carrier E-100也是要有弹夹炮的。除此之外，没了，不过 也许还有一些不为人知的弹夹炮坦克计划。
Q: Is there any other kind of gun that the PzII Ausf J had aside form the 2.0 cm KwK 38?
问：2号J型的炮除了那杆2.0cm KWK 38以外还有别的炮么？
A: Nope. The PzII Ausf J was meant to be a scout tank, so improving armament over the original PzII was not a priority. The tank quickly proved inadequate for its task, and was discontinued without receiving further modernizations.
答：没了。2号J型本来到定义是侦查用坦克，所以火力在2号上就不是那么重要了。 这辆坦克迅速的被认定为不合适侦查用，于是这辆车在没有更多的改装型号的情况下就这么没了（退役/消失）。
Q: Were there tanks like E-100 planned by other nations (big gun on a heavy tank)?
问：像E-100这样的坦克，其他国家也有过打算生产的计划吗？（重坦外带一门强力的炮）
A: Heavy tanks fell out of favour after the end of the war, so nothing quite like that. The closest thing was the BL-10 armed IS-7 SerB talked about, but that was never built.
答：重坦在战后就不怎么吃香了，所以没有。SerB说过最接近E-100的计划就是带BL-10的IS-7坦克，不过那个也从没有投入过生产。
Q: Were there Soviet rear turreted tanks? Why were they made? How did they compare in combat?
问：苏联以前真的有炮塔后置的坦克吗？为什么要造出来？他们在战斗中与其他坦克的表现比较一下又如何？
A: The reason for putting the turret in the rear was to allow for a larger gun. The gun’s weight would not shift the center of mass too much, the length would not interfere when fighting in the city or on bumpy terrain. Several Soviet rear-turreted tanks were planned, like the A-44, Object 416, and Shashmurin’s breakthrough tank. None were ever mass produced, so it is hard to judge how well they would have performed in combat.
答：炮塔后置的原因是为了放一杆更大的炮进去。炮的重量就不会干扰到整个车的重心（如果放在前面很有可能不平衡直接翻车之类），炮管的长度也不会在坦克进行市区战和恶路行军时造成太大的影响。苏联有过几辆计划中的炮塔后置车，例如 A-44, Object 416（416工程）以及Shashmurin’s breakthrough tank（Shashmurin的突破坦克）。不过没有一辆进入过量产阶段，所以很难判定他们在实战中的表现如何。
Q: How legit is this?
问：这东西可信度有多高？
A: Completely legit.
答：妥妥的。
“鉴于新的85mm炮不能满足所有基于T-34底盘制造的火炮，在1943年的秋天，安装更大口径的武器的工作完成了。在白板炮塔的基础上安上了一门122mm A-19炮。整个火炮的质量就变成了32吨。相对于D-5S-85炮，穿深提高了30%。这辆车的工厂编号是SU-D25。”
“除了SU-D25工程之外，UZTM（坐落于俄罗斯叶卡捷琳堡的一家重工厂，下略——译注）也基于SU-85开发了一辆强力的火炮：一杆由9号工厂设计的152.4mm D-15榴弹炮。一颗48~49kg的炮弹的出膛速度是508m/s。穿深相比85mm炮增加了28%，HE的能力（应该是杀伤能力）提高了100%。这辆火炮的推荐重量是31吨。它的工厂编号是SU-D15。这辆火炮与SU-152有着非常相似的武器配备，但是还是比基于KV底盘的SU-152火炮轻很多。”
Solyankin et al，苏联中等火炮，1941-1945