(or just lousy designs that flopped)

The Soviet T35 dated from the 1930's. The longest tank ever built, it had five turrets and broke down often. (Model is 1/87 scale).

The Soviet T26 was an ineffective light tank with neither strength nor speed. Phased out in flames in 1941.

The French AMX-13 dated from the 1950's. A light tank, it was mostly used by third-world armies.

The M551 Sheridan was a light tank with a massive 152mm gun. Not a good combination.