Quote:
Originally Posted by Richard Lowe
Actually on 3 gear 2wd's the armature/rotor spins in opposition to the wheels  |
Yes of course. I phrased that sentence in a poor manor, sorry. What I'm trying to say is that on a 2 wheel drive the motor is rotating along the lateral axis, the same as the wheels. And that this isn't always the case for 4wd, as in shaft drive 4wd the motor rotates around the longitudinal axis. As obviously within the gearbox each gear is spinning in a different direction, hence I said in my original post that some parts will contribute to the moment of inertia, and some will detract. As you say for 3 gear 2wd (I don't think you can buy belt ones any more?) The rotor in the motor will be opposing the moment of the wheels, as will the idler gear in the box. However the spur, slipper clutch, input and differential all add. It's all about the net difference, hence I said it depends on each model.
In 4wd shaft models the rotor, spur and slipper have no effect on the rotation of the car about the lateral axis (i.e. nose up/down) as they are rotating in the longitudinal axis. Sorry for confusion.