[RedDevil]

Originally Posted by JulianEdgar

Aerohead has often in the past equated a 10 per cent reduction in drag with a 5 per cent reduction in fuel consumption. There are no qualifications in the title of the thread - he's simply pushing the old barrow.

If you're not prepared to find out information for yourself, and you're not prepared to believe me, well you're going to end up with some major misconceptions about car aerodynamics.

When I say: "Don't believe me - find out for yourself" that's apparently not OK? At least some people here have taken me at my word, and looked at some books and done some testing - and of course have quickly found the depth of misinformation being disseminated here.

And I love it how you suggest I am "making claims"!

I mean, what a claim it is to state that (for example) Reynolds Numbers aren't calculated using area! That's a bit like making the "claim" that Force = mass * acceleration. For most people, that's a fact.

I feel Aerohead put it in the banner like that because it is such a dead-beat horse. The fact that roughly about half the fuel consumption at highway speeds is due to aerodynamic drag is something that often comes up in explanations of car aerodynamics to the general public. Nobody on this site believes that the 10%-5% ratio is a precise and immutable truth for all cars in all conditions.

Please bear in mind that I indeed cannot evaluate or fact check everything.
Many things that are factual to you evade my knowledge or insight.
What should I do with that? Just accept all for true just because you say so? I still would not understand it. What have I learned then?

But I'm glad we can at last discuss it in a cordial way. I hope it will continue like this.