Calculating rolling resistance force and coefficient

[boba]

I am comparing three brands of tires to see which one provides the lowest rolling resistance and thus give the best efficiency at low speeds. I have the information of the tires such as footprint, weight (of the tire and load), speed.

How would i go about doing this ? am really stumped
thanks

 

[BvU]

Hello boba,

There's no theory that can help you here. You'll need to determine this experimentally.

 

[boba]

Hello boba,

There's no theory that can help you here. You'll need to determine this experimentally.

Hey BvU thanks for the reply, What kind of experiment would you recommend? the size of the tire and load (0.5tone tire and 10 tonne load).

I was thinking measuring the hysteresis and thus getting the loss due to rolling, but i couldn't think of a safe was of doing it.

thanks

 

[jrmichler]

Rolling resistance of different tires, and the effect of tire pressure on rolling resistance, is a regular topic of discussion at www.ecomodder.com/forum. There is also information at: https://www.tirerack.com/landing/fuel_efficiency.jsp.

You can measure rolling resistance by a coastdown test, but that requires four tires installed on a car. There are other ways to estimate rolling resistance, but the only way to accurately measure it is on a real road while loaded. That pretty much requires a coastdown test. There is no good way to calculate it from published properties.