Archive for category: Truck Science

What is grade resistance?

May 10, 2016/5,897 Comments/in Truck Science /by admin

Grade resistance is the rearward acting force component of the vehicle weight on a grade. It is the amount of force required to overcome gravity, and is given as .01 times the gross weight times the percentage grade, with units of pound force. Read more →

Why does Rolling Resistance matter in the real world?

March 1, 2016/1,129 Comments/in Truck Science /by admin

Some 13% of the power produced by the engine to move a long haul rig along a smooth road at 65 mph is “lost” due to Rolling Resistance. What is it, what causes it, and how can you help to reduce it.