Engine Talk

[ebbfolls]

I've plotted a graph similar to the one you posted. This is the power output of the same engine measured at the output end of 2 reduction gear ratios. As can be seen, both power curves have the same HP levels as power does not change regardless torque reduction or multiplication, assuming negligible friction.

It's interesting to note how the difference between the HP requirement and the HP output of the engine is much greater with the lower gear from Point A to Point B. Points C and D, on the other hand, point to the increase of the top speed afforded by the taller gear.

The 'area under the curve' should probably equate to energy expenditure.

You are welcome to correct any misconceptions.


(Sorry, that didnt work. How do you paste a picture here anyway?)