T69

As originally specified for the T42, it was concluded an automatic loading mechanism should be integrated into the T42 design if it was feasible. Preliminary attempts to design and mount such a device for the T42 turret proved unsuccessful because of the limited space the turret provided. Further studies suggested an automatic loader could be practically designed if integrated into an oscillating turret.

Dated 10 January 1951, the proposed turret was drafted for integrating a T139 based 90 mm gun. The turret would be installed on the third T42 pilot and the complete vehicle was designated as the T69. The gun was designated as the T178, essentially being a T139 mounted upside-down.

The T69 underwent tests from June 1955 through April 1956. During this time, the automatic loader experienced several failures which prevented adequate evaluation of the system. This was a contributing factor in the project's termination. While the T69 wouldn't enter production, it provided valuable information towards the design and implementation of oscillating turrets.

This tank is essentially the elite version of the old regular T69, just turned into a premium tank. My main reason for this decision is because there was only one version of the T69, with no upgrades or changes considered for the design (as far as I can tell). It would make more sense for the vehicle to be a premium in that regard. Also, the US is sorely lacking in potential premium medium tanks with 4 member crews, so this would be the go-to for that.

Guns: 90 mm Gun T178 (autoloader)

Engines: Continental AOS-895-3 (500 hp)

Turrets (Turret Armor (mm)): T69 (102/76/147)

Suspensions/Alternate Hulls, Total Weight (metric tons): T69 TBS (34.47)

Hull Armor (mm): 102/76/25

Top Speed: 51 km/h

Crew: 4 (Driver; Gunner; Loader; Commander/Radio)

See Also: T42, T77

Sources:

Hunnicutt, R. P. Patton, 2015