scott wrote:
>> I was under the impression that the rod is ridig, and therefore can't 
>> twist (only rotate).
> 
> Nothing is perfectly rigid, a strain gauge on the rod will easily pick 
> up the twist in a rod accurately enough to determine the torque and 
> angle it is twisted.
> 
> On the older style mechanical systems they probably have a special small 
> section that is a more flexible than the actual rod, that incorporates 
> the valve design etc.

Mmm, OK.

Presumably you want it to not be *too* flexible though, lest the power 
steering mechanism stops working. It would be nice to still be able to 
steer. ;-)

Tell me, does this mean that there's no such thing as an inelastic 
collission outside of textbooks?

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