"The Natural Philosopher" wrote in message
...
IMM wrote:

"Rod Hewitt" wrote in message
.. .

"IMM" wrote in
:


A car has no insulation, as they produce so much waste heat the
engines can provide enough even in the coldest conditions. Adding
insulation, bonded to the cars sheet metal around the cabin, would
improve matters. The drive motors and batteries produce heat, so this
must be available for use.


And also add to the cost and weight...


Insulation should not add that much weight. Cost? Mass production will
bring that down.


I doubt that any heat would be available from motors if they are fitted
into the wheel hubs.


If they are. Most electric cars have one motor.


There may be problems supplying enough electrical power for the
demisters,
seat heaters (oops, well I have a Saab), and other things (maybe needing
a
heater for the screen/headlamp wash and other currently
unnecessary/rarely
fitted devices).


Cars are full of unnecessary crap which add cost and weight affecting
fuel
consumption, such as rev counters. Why does anyone need to know how
much
the engine is revving in a normal road car? Beats me. I know when it
is
revving, I hear and feel it. If it is revved too much the management
system
cuts it out.


True. Fashion accessory.

An electric window on the drivers side is unnecessary too


IMHO its mandatory. Its the window you use the most in paying for
parking tickets, and pulling them out of silly little slots only to feed
them into other sily little slots later...not to mention tossing coins
into teh darford crossing machines. The ability to get it down, and up,
quickly, without doing more than touch a button is essential.

, as
are electric sunroofs, which are a British fascination. The French
don't
want to know them.


Did you know IMM that it has been calculated that the weight, ad cost,
of winding handles exceeeds teh weight, and cost, of electrically driven
windows and sunroofs?

No. I don't suppose you do.

Or that the loss in power due to aerodynamic compromise of an open
window in hot weather is greater than the loss due to using a modern
efficient aircon?

No, I don't suppose you do.


Or that the losses in colling an engine via teh viscous fan exceed the
losses in blowing hopt airt into te caboin in winter?

You probably could work tat one out..

I knew all them, and knew them before you.

Why isn't the a/c an absorption system using waste engine heat, instead
of
taking power off the crank, reducing mpg?

Because its low grade power, and would need a HUGE HEAVY installation to
get colling out of it.

In the US absorption systems were found to be viable in cars.

Its time you enlisted in a snotty uni and learnt basic engineering.

The sort of engineering I should engage in is demolition engineering, and
run bulldozers through Oxbridge, Eton, Harrow, etc. Then we will all be
better off.


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