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The Natural Philosopher The Natural Philosopher is offline
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Default Electric cars a step nearer mainstream?

Adrian wrote:
The Natural Philosopher gurgled happily, sounding much like they
were saying:

And the answer to how big that is, is well under half a tonne for
the smaller one.


...or about half the weight of the rest of the car...


Similar to the power train on an IC car.


Rubbish. Rover's K-series weighs about 130kg with transmission.


And radiator?


Weighs sod all.


Er.. alt least 13 litres of coolant in it, so 13kg..


and starter motor?


I would assume included.

and exhaust system?


10kg at most.


It all adds up,. thats anoteh 25kg weve added to your 130kg.

and fuel pump


Oh, please...


about a kg.


and mountings for all those, and ancillary pipework?


Next-to-nothing.


about 40kg for enough steel to take the torque and vibration of a big IC
engine, and connect the stresses to the suspension pickup points.





Add 50kg for fuel, and you have a complete powertrain with a 300 mile
range (and five minutes recharge for the next 300 miles) for 40% of
that "half a ton".


And costs ten times as much per mile on fuel to run.


These 70 nuclear powerstations and tripling of the National Grid - free
to build, are they?

Nuclear electricity comes in at about 2.5p/Kwh and 90% of that is the
cost of building and decomissioning it.

I suppose you are going to tell me that oil pipelines, oil tankers,
refineries, car engine plants. Motorway service staions are all 'free'
are you?


If you look at the cost of nuclear stations with respect it the oil
import bill, you mihht be surprised at how little real opportunity cost
they add.



Current lipo technology is about 185Wh per kilogram.

http://www.maxamps.com/Lipo-10000-Cell.htm

That puts a 50Kw pack at 270kg.


The powertrain on a 2cv - engine and gearbox - is light enough to be
carried by two people. With 25 litres of fuel, it'll give a four-seater
car weighing half a ton _complete_ a range of 200+ miles.


pretty much the same as an electric would be, then.


Apart from the small detail that 200 miles worth of batteries alone would
weigh the same as, if not more than, the petrol car.


So a 2CV weighs 1/4 ton?

But you just said it weighs half a tonne?

A 50KW pack is more than enough to take a 2CV type car 200 miles. It
weighs 275kg or less.

Leaving another 225kg for te rest of the car.

So either you are simple, a liar, or you cant do maths: Your choice really.