Cat vs Powerstroke torque curves
I drew out what I expect the Powerstroke torque curve would look like relative to a Cat C11. I think it is very interesting how these curves reveal the different pulling characteristics of ...
Forum Discussion
transamz9 wrote:
I have a stupid question for all the mathematicians on here. Everyone always says that torque is not work it's a force. Answer me this. If you ran out of HP on a slope and stalled out and stop you are now not making any hp correct? So now no work is being achieved because now you have torque applied to hold you from rolling backwards but no RPM are being achieved. Now reduce the applied torque just enough to allow you to roll backwards but still keep torque applied. Now you have RPMS, how do you measure how much hp it takes to hold a certain speed going backwards down the hill?
The negative HP that the engine, exhaust brake and wheel brakes would have to come up with could be calculated as follows: (% grade of hill x speed of descent x weight of truck and trailer/46875) minus the power required on level ground at the speed you are descending. So on the Eisenhower pass example an engine and exhaust brake would be responsible to generate about (8 x 40 x 30000/45000) - 90 or about 123 negative HP.
