To increase firepower, a new long-barrelled 90-mm gun was mounted on the T26E1 in January 1945. The prototype was designated the T26E4. Development was discontinued in January 1947 due to problems with the gun and the loading mechanism. A total of 25 vehicles had been built by that time, but never entered service.
The T26E4 "Super Pershing" is a M26 Pershing with upgraded protection in the form of spaced armor. It is analagous to the M4A3E2 Sherman Jumbo in that it is the up-armored variant of a mobile medium. The T26E4 does not however have access to the upgraded engine or the long 90mm of the M26, but instead does have the similar but historically-accurate long 90mm tested on the tank. The turret face of the T26E4 has very good durability to complement the tough frontal hull. This makes it nearly impervious to HE shells from the front, and allows it to hold positions or assault them reasonably well.
The armor, while very tough, is not completely immune to gunfire. The T26E4 has three large weakpoints: the turret cheeks under the "ears" formed by the additional armor welded on, the commander's hatch and the machine gun port on the right side of the hull. Shots entering here will penetrate and deal damage. However these weakpoints are covered up nicely when hull-down on a reverse slope. The T26E4 is very slow for a medium tank and is especially vulnerable while climbing hills or when it has found itself to have been flanked. This, coupled with the T26E4's sluggish turret traverse, means it will often be easily flanked, where its much thinner side and rear armor can be engaged. Likewise, this means the Super Pershing will not be able to flank opponents, forcing you to fight enemies head-on. The T15E1 gun has average accuracy, and lacks in penetration, alpha and DPM. When playing the Super Pershing, great care must be taken to aim for the weakpoints on enemy armor and prepare to load premium ammunition.
As a premium Tier VIII tank, the T26E4 is a is relatively inexpensive tank in terms of operating costs per battle, but will not normally generate as much income as other premiums with more effective guns due to its issues generating damage without premium ammo. However, with its HVAP round the T26E4 should not be underestimated when squared off against an opponent, as players who take advantage of the good performance of the premium ammo are still quite capable of easily destroying tanks the 90mm should never have otherwise penetrated while laughing all the way to the bank.
You can download this paper model template here: World of Tanks - T26E4 Super Pershing Medium Tank Free Paper Model Download [Simple Version]