Hiclone question

tomstickland

Fuel consumption is a function of power output, and power rises with speed cubed due to air drag. I'd expect the best mpg to result from driving along at 2500rpm in 1st or 2nd gear.

Braking itself doesn't waste fuel, but it is turning the momentum of the car into heat, from which it can't be recovered. So it does waste fuel if a smoother driving style mean that the braking wasn't necesarry.

Conor_3

Pew_Pew_Pew_Lasers! wrote: »

A false generalisation.

Wrong. As you increase speed, wind resistance increases. If you look at a typical wind resistance graph, there gets a point where the resistance increases exponentially compared to the speed.

Pew_Pew_Pew_Lasers! wrote: »

Braking doesn't affect fuel consumption.

Yes it does because it requires energy to get back up to speed again.

FlameCloud

Conor wrote: »

Wrong. As you increase speed, wind resistance increases. If you look at a typical wind resistance graph, there gets a point where the resistance increases exponentially compared to the speed.


Yes it does because it requires energy to get back up to speed again.

I think his point was that breaking in itself doesnt increase fuel consumption at all things that have to happen after it (i.e. acceleration) may do but this is seperate.