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Dave Plowman (News) Dave Plowman (News) is offline
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Default The physics of cars - a question sequence.

In article ,
Roger Mills wrote:
On 02/04/2016 11:26, Dave Plowman (News) wrote:
In ,
Roger wrote:
In fact, I invited Mr Plowman to consider these two scenarios - with
a stepless transmission holding the engine either at its max torque
point or at its max power point - but he ruled it invalid because
such transmissions don't exist.


Sigh. Only because the transmission type makes not a scrap of
difference to my original statement. If you did want to discuss
different types of transmissions I'd be happy to join in.


Maybe you'd better remind us what your original statement was, since it
got lost in the mists of time!


Can't be bothered. Many seem unable to read or understand a simple
statement.

Seems to me that we are arguing over semantics and may even be in
agreement over the engineering principles (though I'm not 100%
convinced!). So let's try again.


I'm not arguing over semantics.

Q1: How do you maximise the acceleration of a car in a given gear?


A1: By using full throttle and running the engine at its maximum torque
speed.


If you ran the car at maximum torque there'd be no acceleration, since
that occurs at specific revs.

Q2: How do you maximise the acceleration of a car at a given speed?


A2: By using full throttle and by choosing a gear which enables the
engine to develop its maximum power (or as near to it as the choice of
gearing permits).


And that's where you're wrong.

Unless I misunderstand you, you are saying that the answer to Q2 is A1.
If so, you are simply WRONG!


As I said before, some seem totally incapable of understanding a very
simple and basic condition.

--
*Parenthetical remarks (however relevant) are (usually) unnecessary *

Dave Plowman London SW
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