Reply to post: Re: Only 2 motors

Tesla's Elon Musk shows the world his D ... and it's a monster

Nigel 11

Re: Only 2 motors

Interesting that they went with two motors. It means they still have to mess about with differentials, whereas a four motor design can do all the power distribution electronically as well as use smaller motors which would be easier to cool.

A safety issue? If something went wrong with the control of four independant motors the car would suffer an enormous turning torque and would become completely uncontrollable. In contrast if the distribution of power between front and rear motors went haywire, there's a decent chance the driver could deal with the problem (at least if he's not going round a corner at high speed when it happens).

Similar to the way civilian aeroplanes waste fuel when cornering and generally can't turn sharp corners, because they are built to be highly stable and self-correcting onto straight-line flight. In contrast, military aircraft these days are designed completely unstable, and can't be flown without the avionics. That's because for military use, failure to dodge incoming fire is a much more likely failure mode, than avionics failure sending the plane tumbling out of control.

On a racetrack we may get to see four independant electric motors in action. On the public roads, I doubt it.

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