I have tried this scheme. During tests, it is able to go to full power even if the engines are not started at the same time, although I’m not sure that it will always work. It seems to depend on the tick order and depending on the direction, either start without problems or at the start, some engines can temporarily block and Power fluctuations can break Axles even if theoretically their strength is sufficient, so you have to use stronger Axles.
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