On Dec 1, 3:21 am, firstname.lastname@example.org wrote:
Low rolling resistance tyres are available that allegedly knock up to
7% off fuel consumption.
Some of them run at 60psi.
I think they need special wheels though.
A lot of energy is lost through hysterysis in tyres.
There are plenty of cars do 70mpg in Europe.
If you go electric, 300mpg+ (equivalent) is available.
Most have low RR tyres.
So the OP is correctish.
On Saturday, December 1, 2012 3:36:38 AM UTC-5, harry wrote:
Yeah, but if you're actually going to be serious about the subject, note that this page suggests that only about 15% (max) of fuel consumption is used by rolling resistance, so if you drove around on titanium disks that 20 mpg car would still only get around 23 mpg. At highway speed, it's all about air resistance and engine efficiency.
Hmm.. Define "equivalent". Either way, getting any significant portion of the world using electrics would probably only be made possible any time soon by building a bunch of new nuclear plants... Pick your "poison".
Personally, I think our only real hope is some fundamental breakthrough in solar... (With our luck, when they find something, it will be arsenic-based.)
Has anyone done the calculations yet to see if replacing the nuclear plants with wind power will alter the path of the jet-stream enough to destroy the planet? :)
present power plants are sized for peak loads...
mid afternoon at 115 degrees, business output too....
electric rechargable vehicles would tend to be recharged during off
hours, like after 5 pm till 8 am .....
that should be plenty of time to recharge batteries
On Saturday, December 1, 2012 9:02:42 PM UTC-5, bob haller wrote:
And my point was that that works as long as very few people have them. If there
were one charging in even half the houses in the U.S., 5pm-8am would no longer
be "off hours".
And even if you didn't have to build more plants, using more electricity during
"off hours" still means more fuel rods used up and needing to be disposed of.
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