Assertion: tank's predecessor | /r/HasProperty | vk
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text: The principal problem in the design of the Maus was developing an engine and drivetrain which was powerful enough to adequately propel the tank, yet small enough to fit inside it — as it was meant to use the same sort of "hybrid drive", using an internal-combustion engine to operate an electric generator to power its tracks with electric motor units, much as its Porsche-designed predecessors, the VK 3001 (P), VK 4501 (P), and Elefant had.