Quarter-scale test model of Vladimir Israilevich Levkov's proposed 120kph "hovering amphibious tank". The inevitable cancellation can be attributed to the usual factors: insufficient political support, a lack of funding, and the cruel and unexpected whims of [checks notes] basic physics.
Looking like a Dalek's commode can't have helped.
@DreadShips This post inspired me to rewatch Sgt. Bilko today.
@gargron it's usually a 24-hour wikihole marathon that people tell me I'm responsible for, so I guess you got off lightly!