On 23/06/18 14:28, John Rumm wrote:
On 23/06/2018 06:56, The Natural Philosopher wrote:

https://www.youtube.com/watch?v=_2l5bOhHNxU

Answer. not by very much, if at all.

So the short answer to your question is "yes".

This seems to be a perpetual urban myth.

Which you have just agreed with by claiming there is a small change.

No the urban myth says that since there is say a 10% change in what
peooplle think is 'the radius', therefore the RPM will be 10% slower.


It tyre pressure sensors are using this, it has to be a very very
complicated bit of software to detect - say - less than 1% change in
RPM relative to the other wheels.

Can't see that being too difficult in itself - especially as you
probably have input from other sensors and know the steering angle input
Â*and so can assess when you are driving straight and not under high
acceleration etc.


Why would there be monitors on steering angle?


Type pressure monitoring will need to be more sensitive to rate of
change than absolute difference since unequal tyre wear would otherwise
be flagged.


Well teh way it aseems to work is that one wheel will overotate with
respect to its diagonal consisetntly.

But not by very much.




--
Its easier to fool people than to convince them that they have been fooled.
Mark Twain