Although none of the proposals from the first Questionmark conference were selected for development, the conference served a very useful purpose in exchanging ideas. To obtain alternate design concepts from the industry, a research and development program was initiated in April 1952. Under this program, contracts were awareded to the H. L. Yoh Company, Inc.. The company presented a report on June 1, 1953 outlining seven preliminary design concepts for a new medium tank. The tank concepts ranged from conventional to outlandish. All seven tanks used the AOSI-1195-5 engine and mounted the 105 mm T140 gun.
The first design proposed was a fairly conventional design. The turret ring was 89 inches in diameter and was estimated to weigh about 46 tons. The concept included several unique features, such as a machine gun in the turret side wall for use by the loader, a cable ammunition hoist to assist the loader, and a "track within a track" for emergency use, so the tank could briefly move itself out of danger in case the front road wheel or track was blown off. The suspension utilized horizontally mounted shock absorbers. A new hollow gun shield would allow the shield to function as spaced armor.
This tank should be a fairly conventional design. For a medium tank, it would have exceptional hull-down capabilities and above-average reload speed. This can be balanced out by having poor gun handling characteristics and overall maneuverability. While the "track within a track" concept would probably be impossible to implement, this can be mitigated by giving the tank strong track health.
This tank could most likely be compared to the M60, but with worse gun handling in exchange for a better turret. Truthfully, this tank would behave more like a heavy tank than a medium tank. I think this tank would make for a fine reward vehicle.
Guns: 105 mm Gun T140
Engines: Continental AOSI-1195-5 (675 hp)
Turrets (Turret Armor (mm)): M-I-Y (??/??/??)
Suspensions/Alternate Hulls, Total Weight (metric tons): M-I-Y (41.73)
Hull Armor (mm): 127/??/??
Top Speed: 48 km/h
Crew: 4 (Driver; Gunner; Loader; Commander/Radio)
Sources:
Hunnicutt, R. P. Abrams, 2015
Actually, the track within track system was implemented.
ReplyDeleteEven if both tracks is destroyed, the M-IV-Y can move with reduced speed.