Panzer VIII Maus
Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.
Tank car
In the early 1960s, the Union Tank Car Company introduced a series of "whale belly" tank cars which offered increased capacity. These cars carried from in CSOX #31084 to as much as in GATX #96500, which had been conceived as a 'rolling experiment' of sorts. The largest tank car ever placed into regular service, UTLX #83699, was rated at . It entered service in 1963 and continued to be used for over twenty years. GATX 96500 is now on display at the Museum of Transportation in Saint Louis, Missouri. This car is in length, weighs empty, and rides on four two-axle trucks to distribute the additional weight. It was used to transport such diverse substances as liquefied petroleum gas (LPG) and anhydrous ammonia.