Why does low pressure cost mileage?

In article
,
RichD wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.

--
Alan Baker
Vancouver, British Columbia
"If you raise the ceiling four feet, move the fireplace from that wall
to that wall, you'll still only get the full stereophonic effect if you
sit in the bottom of that cupboard."

Alan Baker wrote in news:alangbaker-
:

In article
,
RichD wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.


no one has stated the largest one yet!!!! the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall ratio,
less distance traveled per rev. less milage. KB

On 02/19/2012 03:44 PM, Kevin Bottorff wrote:
Alan wrote in news:alangbaker-
:

In article
,
wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.


no one has stated the largest one yet!!!! the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall ratio,
less distance traveled per rev. less milage. KB

bull. tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.


--
nomina rutrum rutrum

On Feb 19, 9:51*pm, jim beam wrote:
On 02/19/2012 03:44 PM, Kevin Bottorff wrote:





Alan *wrote in news:alangbaker-
:

In article
,
* *wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. *But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, *hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.

no one has stated the largest one yet!!!! *the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall ratio,
less distance traveled per rev. less milage. * KB

bull. *tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.

--
nomina rutrum rutrum- Hide quoted text -

- Show quoted text -

Jesus ! they let you out ?


escopia cidularus

On Feb 20, 4:51*am, jim beam wrote:
On 02/19/2012 03:44 PM, Kevin Bottorff wrote:









Alan *wrote in news:alangbaker-
:

In article
,
* *wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. *But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, *hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.

no one has stated the largest one yet!!!! *the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall ratio,
less distance traveled per rev. less milage. * KB

bull. *tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.

--
nomina rutrum rutrum

cor,isit that time agaim?

On Feb 20, 4:51*am, jim beam wrote:
On 02/19/2012 03:44 PM, Kevin Bottorff wrote:









Alan *wrote in news:alangbaker-
:

In article
,
* *wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. *But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, *hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.

no one has stated the largest one yet!!!! *the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall ratio,
less distance traveled per rev. less milage. * KB

bull. *tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.

You might like to use a synthetic gearbox oil and engine oil to
correct that problem.


BTW I couldn't be arsed answering such an obviously erroneous
statement and thought it'd be better left to some dick to make a
pointless argument Youv'e saved the bother of embarresment of the
innocent by jumping in wellies first wearing a blancmange hat.

jim beam wrote in :

On 02/19/2012 03:44 PM, Kevin Bottorff wrote:
Alan wrote in news:alangbaker-
:

In article
,
wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.


no one has stated the largest one yet!!!! the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall
ratio, less distance traveled per rev. less milage. KB

bull. tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.



yea the select few that are not enginered correctly, but for most it is
entirely correct, KB

On 02/20/2012 04:35 PM, Kevin Bottorff wrote:
jim wrote in :

On 02/19/2012 03:44 PM, Kevin Bottorff wrote:
Alan wrote in news:alangbaker-
:

In article
,
wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.


no one has stated the largest one yet!!!! the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall
ratio, less distance traveled per rev. less milage. KB

bull. tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.



yea the select few that are not enginered correctly, but for most it is
entirely correct, KB

Depends on the speed and grade, not whether the car is "engineered
correctly."

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

On Feb 20, 2:29 pm, Nate Nagel wrote:
On 02/20/2012 04:35 PM, Kevin Bottorff wrote:



jim wrote :

On 02/19/2012 03:44 PM, Kevin Bottorff wrote:
Alan wrote in news:alangbaker-
:

In article
,
wrote:

Low air pressure in tires retards fuel milege, but why?

The obvious answer is, greater friction. But even though
the tire is flatter, still it rolls, there's no relative movement
between the pavement and tire, hence no sliding friction.

So where and how do the losses occur?

--
Rich

Flexing the rubber.

More flex, more energy lost.

no one has stated the largest one yet!!!! the lower the pressure the
smaller the actuall dia of the rotating tire, lowering the overall
ratio, less distance traveled per rev. less milage. KB

bull. tire size has no more to do with mileage than transmission
gearing does - some cars use /more/ gas in overdrive than they do the
next gear down.

yea the select few that are not enginered correctly, but for most it is
entirely correct, KB

Depends on the speed and grade, not whether the car is "engineered
correctly."


The OP asks why lower tire pressure takes more energy, and now you're
arguing about hills?

On 2012-02-21 03:38:32 +0000, Dan O said:

The OP asks why lower tire pressure takes more energy, and now you're
arguing about hills?

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