Re: The Electric Car

On Sep 25, 6:38 pm, Eeyore <rabbitsfriendsandrelati...@xxxxxxxxxxx>
wrote:
BradGuth wrote:
Eeyore wrote:
MooseFET wrote:

The main problem with the Hummer on the highway is that it is less
streamlined than a brick.

It has a drag area of about 2.5 sq metres. Its 3 1/2 tons results in a fair bit of rolling
resistance too.

I just calculated the power required to propel it @ 70 mph (the UK national speed limit) as
52kW. That means that 100 miles (at 70 mph) would require 52 x 3600 x 100/70 kJ = 267 MJ

Regular gasoline (per Wikipedia) contains 34.8MJ/litre. A US gallon therefore contains 132 MJ.

So it would only need a 200% efficient engine *** LOL *** to propel this Hummer at 100 mpg (at
70 mph).

Brad Guth doesn't seem to understand the problems about ICE efficiency.

Thanks for those honest enough numbers. However, add quality silicon
enhanced tires,

Bollocks. No such thing. You're just making stuff up. Besides, the rolling resistance is a small
proportion of the total drag. You could of course fit SOLID wheels but the ride would be a bit harsh
!

give that brick of a Hummer a high energy density
battery/fuel-cell, feed it and that little one-cycle efficient engine
with h2o2 plus whatever fossil derived fuel (such as common diesel
road fuel) for accommodating the little ICE, and say it again, KT.

That will not affect the energy required. So your 100 mpg claim is quite simply barking mad.

Graham- Hide quoted text -

- Show quoted text -

Once again, Sir ExxonMobil, up yours.
- Brad Guth -

.

Relevant Pages

  • Re: The Electric Car
    ... Bollocks. ... the rolling resistance is a small ... with h2o2 plus whatever fossil derived fuel (such as common diesel ...
    (sci.electronics.design)
  • Re: Audio Research power transformer
    ... PT's burnt primary winding (only 0,8 Ohm DC ... ** BOLLOCKS - the primary resistance value is a BASIC characteristic ... Power transformers of the same VA and voltage have very similar values and ...
    (rec.audio.tubes)
  • Re: Audio Research power transformer
    ... PT's burnt primary winding (only 0,8 Ohm DC ... ** BOLLOCKS - the primary resistance value is a BASIC characteristic ... Power transformers of the same VA and voltage have very similar values and ...
    (rec.audio.tubes)