Hybrid Car – More Fun with Less Gas

70 mpg - Page 9

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Posted by Neo on January 5, 2010, 12:48 pm
 



I agree that a scooter is would have no problem in a
urban driving environment - it would also have a parking
and manueverablity advantage over the larger cars and
trucks as well. Its disadvantage would be protection
from the weather and safety.  Certain metro-only cars
like ones made in Inda or China (e.g. Reva, Flybo)
might be a better fit than a scooter if weather or cargo
capacity was a primary need/mission. If cargo capacity
is not a problem and the operator is physically fit -
a regular bicycle might be a better fit in an urban
environment  than a scooter.

With a ICE vehicle the power transfer efficency is not just
a matter of power to weight ratio but also the ICE transmission
efficiency (power to transfer ratio). for a particular speed which
is why very skilled drivers can optimize energy efficiency
with a manual transmission and why a properly tuned
transmissions with additional drive gears (or a CVT) has
better fuel efficiency than the a vehicle with less drive
gears. Each vehicle is designed with a maximum payload
in addition to its curb weight which the ICE is designed
to efficiently handle - that maximum payload includes the
weight of the operator/driver - so a 400 lb scooter operator
take more fuel to move than a 100 lb scooter operater
(with no other payload)  - not to mention that a skinny
operator might have less wind resistance at higher speed.
Once the kinetic energy of the ICE moves the tires - the
vehicle has wind resistance and the tire's friction/rolling
resistance of the tires to deal with.  The wind resistance
is a function of wind surface and that wind's surface
drag coefficient.  Most scooters and motorcycles have
very little wind surface but a high wind surface drag
coefficient.  Most four wheeled vehicles like trucks
have a much larger wind surface but a lower wind
surface drag coefficient.  While one passenger/driver
motorize bikes have the potential for the lowest overall
wind resistance and probably the highest fuel efficiency
that commercial potential has not been realized.

Posted by vaughn on January 5, 2010, 1:03 pm
 




While I am currently a fan of the plain 'ole bicycle, e-bikes are looking better
and better, especially for commutes up to 10 miles or so.

Vaughn



Posted by nospam on January 5, 2010, 1:05 pm
 

Neo wrote:

The fact remains that there are no 70+ mpg cars in the USA, and there
are no cars that sell for anywhere near a scooter does. As most scooters
are driven in urban settings under 40mph wind resistance isn't a problem.

For what the original poster needed transportation for the scooter fit,
even if you had a car you'd cut your gas consumption considerably by
taking the scooter when weather permitted. Personally I'd go with an
electric scooter and a small pv set up as I drive less than five miles a
day and pay nothing for gas at all.

Posted by Neo on January 5, 2010, 1:55 pm
 

On Jan 5, 8:05am, nos...@nevis.com wrote:

It is true there are no 70+ mpg cars in the USA, and there
are no cars at the same price point as a scooter (electric or gas).
If a scooter is driven under 40 mph, they should be able to
achieve FE over 50 mpg.

In the next decade, the USA will likely eventually follow
the current global market trend of using urban/metro-only
vehicles like India's Reva. Metro only vehicles will take
a good slice ouf to scooter-motorcycle-car urban market.
Metro only four wheeled vehicles will get a much  higher
FE than car, cost much less than a regular car, while
providing a higher level of functionality than a two wheel
vehicles.  I expect Metro only cars will be first introduced
in the USA as urban-use-only taxis/car rental service.

Posted by Josepi on January 5, 2010, 6:24 pm
 

Grid power is much cheaper than PV and peddling would be far cheaper than a
set of those rechargable batteries you would be replacing.

Lots of fun though.


Neo wrote:

Personally I'd go with an
electric scooter and a small pv set up as I drive less than five miles a
day and pay nothing for gas at all.



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