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.
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)
Hunnicutt, R. P. Patton, 2015
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