Originally Posted by HybridSS
Damn dude..you fucking rock. Good stuff there.
The only question is...why is the graph on the constant HP example non linear? It should be the inverse of the TQ graph shouldnt it?
Anyways...the constant TQ graph at the top is a great example to look at. Even though HP rises sharply...the car that this motor was in would accelerate at a constant rate from 1000 to 7000 rpm.
I think utilizing HP figures are much more useful for something like an airplane that will operate usually at X rpm and stay fairly constant to get thier work done. The HP # in that case could tell you alot about the potential of the airplane. Where as an accelerating engine in a car its just much easier for me to look at the TQ in the entire rpm band to see what the acceleration may be like.
Airplane or even a boat, both of which operate at a nearly constant RPM range for most industrial applications (ie large ships, ect...). However, most of the heavy industrial engines have such low engine operating speeds, it would be difficult to show on a graph what their true powerband would look like. I'm not an expert in the field or anything, but it would be interesting to see what a really low RPM tug or heavy cargo diesel motor's curve looks like.