PurpleT3 wrote:As I originally said, an internal combustion engine is only about 30% efficient at best. So if we can get 30-35MPG out of a conventiional internal combustion engine, if we can improve the efficiency we could get at least 3x the mileage. So 100MPG is possible, we just have to figure out a better way to use the energy in the petrol.
These terms aren't really related. MPG fuel economy is influenced by engine efficiency, but it's not the main factors.
The main factors in MPG is the weight and wind resistance of the vehicle.
For example, I have a Petrol VW Passat, it can get above 40mpg on the highway, because it's coefficient of drag is 0.27 (very good).
Current turbo-diesel smaller and lighter volkswagens are pushing the 50mpg mark (which is better than what these crappy hybrid cars like the Prius are getting).
My motorcycle doesn't have an efficient motor, has terrible aerodynamics (probably over 0.7 - as the most aerodynamic motor cycles are only 0.56), but gets over 50mpg. That's because it's light.
So that Aptera isn't really that impressive. I mean the thing is basically a slightly bigger 2-seat solar car. Very light with very low drag. It should have fantastic fuel economy.
I have an old VW Beetle ad where VW take the p*ss out of the other car manufacturers fuel economy claims by stripping down a beetle, putting a jockey in to drive, and achieving a fantastic fuel economy figure.
In Australia most of the electricity comes from coal fired power stations. So electric cars over here are essentially coal powered cars.
Hydrogen has exactly the same problem at the moment. The hydrogen is made from electricity which mainly comes from coal fired power stations. So again hydrogen cars are essentially coal powered cars.
The only way for this to change is to either put huge amounts of money into renewable energy (wind / solar) or the public learns to accept that nuclear is the easy way to large amounts of low emissions / pollutants electricity.
Wes -
www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control...
🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.