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Ron read page 2 of this article, and if your next criticism is leaks, then consider the new hydraulic fluids are biodegradable and you could actually drink them. "I can hold a 500 HP hydraulic motor in my hand, and I am not a big person" quote from Charles Gray on the second page. How big is your 500 HP electric motor?
How about the 15% loss of power in charging the Nissan Leaf's battery (source Consumer Reports testing).
Parker Hannifin has held a chain less challenge for students to design hydraulic hybrid bicycles. Human powered hydraulic hybrids (not saying they are more efficient than a regular bike).
That fairly addresses the size issue, and carbon fiber tanks addresses the weight issue.
Lots of old biases against HH designs, all of them wrong.
You could even put a simple launch assist in the rear axle of Nissan Leaf and extend it's range by recovering 80% of braking energy instead of the 30% of an electric vehicle.
Kind of hard to cram 600 HP seconds of energy into a chemical battery in 20 revolutions of the wheels (60-0 fast stop and no electric solution except maybe adding capacitors).
You could even use hydraulics as a load leveler to increase the recharge efficiency of an electric car (stored in the accumulator in 4 seconds released over a minute to charge the battery more efficiently).
I find the it's my way or the highway tunnel vision of advocates of different solutions to be disturbing. It should be an open minded solution oriented perspective that includes every pathway to success.
regards
Mech
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