I'm also curious. I'd bet that they use a smaller version of a pancake generator like [0]. And power it through a gear train from four mainsprings as it says i

I'm also curious. I'd bet that they use a smaller version of a pancake generator like [0]. And power it through a gear train from four mainsprings as it says in TFA. [0] https://www.sciencedirect.com/science/article/abs/pii/S030626192030194X https://www.sciencedirect.com/science/article/abs/pii/S03062...