3 ms·
Elevator pitch: It's not well known that the diesel engine in a diesel locomotive does not mechanically drive the wheels to make the train go, it turns a genera
by goodthink 1y ago
Elevator pitch: It's not well known that the diesel engine in a diesel locomotive does not mechanically drive the wheels to make the train go, it turns a generator that supplies power to electric motors that turn the wheels.
I'd like to build a better hybrid by replacing an EV's battery with a (towable) generator. ~$5k for SmartForTwo EV with an 84kW motor would be my choice. The generator needed is unknown so budget an electrical engineer for $10k or so and that leaves $20k for the generator.
(The towable requirement is only in case the research proves to be a failure I could still sell electricity to my neighbors in a grid-down situation :) Production targets would be busses, 18-wheeler tractors, Cybertrucks...
If we could attain a multiple of current mpg at decent speeds it would be a startup.
- brudgers 1y agoDiesel-electric locomotives solve the what-about-when-you-don’t-need-power-problem with large resistors to convert generator output to heat. Any other solution is non-trivially more complex. Because you need to be able to slam your brakes and then punch the throttle. Dedicated right-of-way means trains don’t operate in rush hour traffic and infrastructure costs dominate their economics. Dedicated right-of-way is also a good way to improve bus efficiency, but nobody wants to pay the political price for that infrastructure.