159 2.4Ti Alfatuned
Join Date: Dec 2010
Location: United Kingdom
County: Vale of Glamorgan
my knowledge of Air resistance and drag factors is limited, so bow to your superior knowledge of it,
But i am a bike rider aswell and because of that i "feel" the drag in a much different way to car drivers and from that i find that drag doesnt affect you as much untill you in the speeds of around 80mph +, unless ofc your in a cross wind or very strong wings. i ride cruisers so they are not setup to "cut" through the air like a sport'er bike or imo a car.
having said that if your driving a brick of a car old rover or volvo ect then resistance will effect the car at much lower speed, and so my knowledge starts to waver here as tyre pressure and condition , suspension setup etc will have a large effect of the resistance created and the cars ability to cut through the air even at low speeds.
not sure how much this has to do with air resistance but our national speed limit is 70mph ,Most of Europe is 68-80mph (110-130kph) except a few of the more "greener" country's eg switzerland where it is 62-74mph (100-120kph) could it be that switerzland realizes that once you go start going over 62mph your engine labours more and there for create more pollution and thats why they have set it at around that speed?
this is ofc all ifs and maybes and as i said i dont know enought about air resistance to post "facts" about it.