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Science...
I love reading Becky Chamber's novels, but I'm finding a common flaw in several of them - perpetual motion machines.
Sidra human form AI, in A Closed and Common Orbit, generates power by harvesting kinetic energy when she moves, but the energy cost of moving will be far greater than that harvested - and that's not allowing for the power requirement of data processing, etc.
Ships in the fleet generates energy from water flowing from the centre to the outside - the ships used to spin, so it would effectively be flowing downhill - but that same water would have to be pumped back uphill for recycling.
Similar problem with the first Monk and Robot book. No way are a couple of small solar panels going to power his bike (which is pulling a fair size load) and the other stuff he has with him.
Who has spotted similar gaffes in other novels?
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