That's awesome! I hadn't seen it before. The fact it is completely impractical doesn't stop it being a creative solution to a major challenge.Indeed, I'm a big fan of convertible tanks (meaning tanks with a drive system capable of being converted between tracked and wheeled modes, not a tank with a removable roof)- they were a major fad in the 1930s. In addition to the ones you listed, the Czech KH-50 looks properly ridiculous in side view:
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In general, tank transport and logistics hadn't really been worked out before WW2, and tank transporters and the heavy trucks to pull them were generally in short supply when they were available at all. All of this has been an excuse to post my personal favorite design vaguely along these lines, the Polish Ursus Autotransporter:
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This may look like a tankette on a trailer that hasn't yet been hitched up to its towing vehicle- but it is not! Instead, the TK3 tankette was designed with a power take-off system designed to let it hook up to the special trailer and power it, with one of the crewmen getting out of the tankette and driving the autotransporter which was designed with everything needed for a vehicle except the engine. In theory the tankettes were supposed to be able to tow the autotransporter behind them over rough ground- in practice, had this contraption been tried in a real war there would have been a bunch of abandoned Ursuses (Ursi?) littering the fields and a bunch of tankettes with worn-out tracks...
You could make a lifelong enemy just by saying "or we could build a flatbed truck" to the designer's boss.