There were several proposals for new designs based on the chassis of the M551 Sheridan. One of these was presented by General Motors under the unofficial designation M551A1 and aimed to utilize as many proposed improvements as possible. While it retained the original armament of the Sheridan, its engine was replaced by the 400 horsepower 8V53T. This gave the tank an estimated top speed of 45 mph and an operational range of 300 miles. The foam flotation "armor" was also eliminated entirely, replaced by a collapsible flotation barrier. The estimated weight of this redesign was 34,150 pounds.
Compared to the Sheridan, this tank simply loses its troll spaced armor in exchange for a bit of extra mobility. It's pretty much just another XM551 Test Bed and should be expected to play similarly.
Guns: 152 mm Gun-Launcher XM81E12 (conventional)
Engines: GM 8V53T (400 hp)
Turrets (Turret Armor (mm)): M551A1 Sheridan (38/15/15)
Suspensions/Alternate Hulls, Total Weight (metric tons): M551A1 Sheridan (15.49)
Hull Armor (mm): 15/32/13
Top Speed: 72 km/h
Crew: 4 (Driver; Gunner; Loader; Commander/Radio)
Sources:
Hunnicutt, R. P. Sheridan, 2015.
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