Quote:
Originally Posted by oil pan 4
That's only for a 100% efficient system with no friction.
To get a vehicle such as my suburban up a hill, I calculated at a speed of 100fps, I think that was about 70mph a 4% grade doubles the amount of horsepower needed to maintain speed.
Unfortunately interstate commerce isn't as efficient as an elevator.
Soon electric hybrid tractor trailers may become common and I think they are going to have really big packs
Even then I really only expect to see them mostly in the city.
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Battery to wheels is typically better than 80% efficient for EV's.
There's been research if one could gain back electricity from elevators by making them go up empty and down fully loaded. But it isn't, the sheer weight of the cabin, cables and counterweight and the friction over the wheels and motor cause losses any way.
An EV of hybrid can harvest energy doing down...
Electrified interstate commerce would be far more efficient than an elevator.
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