The more prototypes and and drawingboard ideas I see the more I think, WOW! Some are plain rediculous, but others really seem quite plausible.
You haven't seen crazy yet.
Swimming Tank proposal from the 50s. The turret is basically a normal angled turret inside, but with a huge outer steel shell built around it to provide flotation buoyancy with the air inside it.
Slat Armor is not new. The above image is from either the 50s or 60s.
Autoloading 105mm turret from the 1950s.
That M60A3 doesn't look that different. The gun is longer, perhaps a higher calibre? What is this about an alternate timeline?
Sorry if I wasn't clear. I colored in that drawing for a friend of mine who is writing an alternate history story, and technology takes a different bent than it did historically.
Some history first...
The Army decided that an all new tank would be needed for it's future main battle tank in the mid 1950s, to replace the M-46/47/48 Pattons in service, which were all the results of "interim" tanks adapting parts of the previous tank in order to get them into service as fast as possible. You can still see a lot of the original tank, the M-26, in the M-46/47/48.
The first T-95 prototypes were fitted with a
smoothbore 90mm gun.
The later T95E3 prototype had a 105mm gun installed.
Later, a 120mm gun was put into the T95E6; which was never built in prototype form, but you can see an artists rendering of it below.
An early precursor of Chobham Armor; known as Silaceous Cored armor, was to be used with the T95 program; and that search light thing on the side of the turret isn't a searchlight. Instead, it's a giant infrared light source used in the fire control system called OPTAR. Basically, a beam of intense IR light is bounced off a target, and the fire control system calculates range by counting the time between the IR light being on and the time it takes for the IR beam to bounce back. Sort of like how laser rangefinding works, but with IR and not affected by smoke apparently.
What happened was that the Army decided that the T95 program was too ambitious in 1960 and officially cancelled the T95 project; and decided to use the M48A2 rearmed with the 105mm T254E2 and call it the XM-60.
In my friend's story, the Army doesn't cancel the program, and instead produces the T95 as the M-60; and the never-built T95E6 is built as the M-60A3 of that story.
Other than that if you like I coud also work on that "FV4401" providing you gave me some idea as to the scale of it.
The dimensions for it are on this image
Linka
Hull is 13' 10" long and 8'3" Wide.
Overall length with the 120mm rifles forward is 17' 6".