"A rig hauling 80,000 lbs is going to have a constant power requirement of about 150HP to maintain 65MPH on flat, level ground. No help from aerodynamics or bearing drag"
That is nonsense.
If there is no drag: then there is no power requirement at all as soon as the car/truck has reached its speed.
He didn't say no drag, he just explicitly removed 2 of the components.
By my calculations using http://ecomodder.com/forum/too... show 62HP needed for .0045 rolling resistance of 40 tons at 65mph.
(.0045 is based on lower end of range for truck tires from wikipedia)
100HP or even 150HP is within the range of possible requirements.
I'd expect even significantly more than 150HP needs to be available for when going up a long hill.
But I dont' see why the math doesn't "add up" - even if we use 150HP.
Even with 150HP, and a range (on just battery) of 190miles, the article says "travel up to 1,200 miles with the natural gas range extender"
The point isn't that it doesn't run on fossil fuels (it explicitly does)
The point is that it can run 1200 miles between refueling and do so at much lower fuel costs. 1200 miles would be 18 hours at 65mph; and truck drivers can only drive for 11 hours within a 24 hour period, so that's more than enough from that perspective - and 1200 miles will get you pretty far - enough that you wouldn't have to have the refueling points be completely ubiquitous.