Originally Posted by Fabrik8

Horsepower is mathematically derived from torque. That's why the plots look like that. Flat torque will make a linear HP plot, because HP = torque*RPM/5252. That's also why the HP plot has a knee where the torque falls off, and also why they peak at the same time. Put those values for torque vs RPM in Excel, and plug them into that formula, and you'll get the power plot. You can see the relationships on the dyno plot once you know it's just math. Once the torque plot becomes a curve instead of a line, the HP plot becomes a curve also. You get the picture.

It's an electric motor, so it makes max torque from zero RPM and then has decreasing efficiency as it goes up in RPM. It all has to do with a decreasing amount of time to build enough magnetic flux per motor pole, I can't remember the specifics of how all that works. L*di/dT and all that crap.

Redline doesn't have to do with anything except engine damage. Lots of engines make good power up to (and above) redline, but you run the risk of valve damage, etc. so a rev limit is there for a reason. An electric motor has a damage threshold too (mostly for the bearings) but because torque decreases with RPM, the safe operating RPM limit isn't going to be the same place that it keeps making lots of power. It's a different device, so you can't really compare the same characteristics of an engine and a motor because of that.

So yeah, it's pretty normal for what an electric motor plot should look like..

Originally Posted by efnstuffup

whom makes these

Originally Posted by BentValve

These guys:

Originally Posted by Fabrik8

It's a car club flyer.

Originally Posted by staticv0id

What's that on the windshield? Did the metermaid give him a parking ticket?