>>924591Duty cycle defines energy storage requirements. It may be unfavorable to have a KERS dedicated B unit, but having B-unit traction motors (like a slug) may be attractive for passenger service. The Green Goat switcher uses I believe a fuel cell and lithium batteries as it's very peaky in power consumption, too much for supercaps (and maybe KERS), so having your powerplant sized for average power and your energy bank covering the peaks is sane.
Turbines, like most engines, have preferred power RPM bands. Thu, rather than having one large turbine, having multiple turbines that you can turn off sequentially can better match performance needs if highly variable. Interesting thing about capstone miroturbines is their sizing and their recuperator design. If you need forced air to cool your resistor bank, rather than a fan, used the forced draught of the microturbine as it needs the preheating.
Ram air effects won't be worth it at usual HSR train speeds unfortunately unless you are hitting the top end.
