Coalition casualties for september

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman" )
wrote:

"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...

I doubt that the rail road rolling stock has much problem with
hydroplaning...

ck
--
The Ten Commandments display was removed from the Alabama Supreme Court
building, But here was a good reason for the move.*

You can't post "Thou Shalt Not Steal" in a building full of lawyers and
politicians without creating a hostile work environment.

Edna H. on alt.books.m-lackey, 20030930

charles krin wrote:

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman" )
wrote:

"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...

I doubt that the rail road rolling stock has much problem with
hydroplaning...

ck

I agree...
--

-Gord.

"charles krin" wrote in message

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.

"Duke of URL" macbenahATkdsiDOTnet wrote:

"charles krin" wrote in message

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.


Sure it will, but it's from the lubrication of the water reducing
the friction between the wheels and the rail, not hydroplaning.
--

-Gord.

On Fri, 24 Oct 2003 19:04:01 GMT, "Gord Beaman"
) wrote:

"Duke of URL" macbenahATkdsiDOTnet wrote:

"charles krin" wrote in message
m
On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.


Sure it will, but it's from the lubrication of the water reducing
the friction between the wheels and the rail, not hydroplaning.

There is a difference between lubrication and hydroplaning?
Aren't they different aspects of the same thing?

Peter Skelton

"Peter Skelton" wrote in message
...
On Fri, 24 Oct 2003 19:04:01 GMT, "Gord Beaman"
) wrote:


There is a difference between lubrication and hydroplaning?
Aren't they different aspects of the same thing?


That depends on the type of lubrication.

Hydrodynamic lubrication is essentially the same
thing as aquaplaning, the fluid forms a complete
layer between the surfaces and the wheel
(or bearing) , this is how plain bearings in engines work
when the engine is at speed. The function of the oil
pump is to help maintain this continuous layer of oil.

In the case of boundary layer lubrication there is no
complete layer but instead individual molecules fill
pits and troughs in the bearing surface effectively making
it smoother and more slippery. When you first start
your engine this is the form of lubrication that occurs
until the oil pressure builds up.

Keith

Keith

Peter Skelton wrote:

On Fri, 24 Oct 2003 19:04:01 GMT, "Gord Beaman"
) wrote:

"Duke of URL" macbenahATkdsiDOTnet wrote:

"charles krin" wrote in message
om
On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.


Sure it will, but it's from the lubrication of the water reducing
the friction between the wheels and the rail, not hydroplaning.

There is a difference between lubrication and hydroplaning?
Aren't they different aspects of the same thing?

Peter Skelton

I see that quite a number answered this so I'll just give my gut
reaction to your suggestion Peter. I feel that it isn't
hydroplaning because speed isn't required to start the process.
The wheel will 'slide' on the rail just as easily no matter how
slowly it's being moved, therefore it's not the 'pressure' of the
wedge of fluid 'lifting the wheel' but the molecules of the
lubricant that's filling the dips and valleys between the two
surfaces that's reducing the friction.
--

-Gord.

Peter Skelton wrote:

:On Fri, 24 Oct 2003 19:04:01 GMT, "Gord Beaman"
:
:Sure it will, but it's from the lubrication of the water reducing
:the friction between the wheels and the rail, not hydroplaning.
:
:There is a difference between lubrication and hydroplaning?
:Aren't they different aspects of the same thing?

Actually, this is true. Hydroplaning is actually a lubrication
phenomenon. We don't generally consider it 'hydroplaning' when it is
a braking phenomenon, though.

At least I don't think we do. :-)


--
"It's always different. It's always complex. But at some point,
somebody has to draw the line. And that somebody is always me....
I am the law."
-- Buffy, The Vampire Slayer

In article , "GordBeaman" says...

Sure it will, but it's from the lubrication of the water reducing
the friction between the wheels and the rail, not hydroplaning.

Well, as long as you don't have the wrong kind of leaves.....

Cheers,
dba

On Fri, 24 Oct 2003 12:08:54 -0500, "Duke of URL"
macbenahATkdsiDOTnet wrote:

"charles krin" wrote in message

On Fri, 03 Oct 2003 17:56:05 GMT, "Gord Beaman"
) wrote:
"Brian Sharrock" wrote:

Now, go and check your tire pressures before the next rain shower.

Yep that's right...we used to use "nine times the sq root of the
tire pressure" for the onset of hydroplaning, which is about
right...you ever think about where a steel wheel rolling on a
flat steel surface will hydroplane?...

follow ups trimmed...
I doubt that the rail road rolling stock has much problem with
hydroplaning...

It actually is a serious consideration when the rails are underwater,
as happens frequently out here in the Plains when we get heavy rain.
Engineers have to be aware that it's going to take longer than usual
to come to a stop.


I agree, but I doubt that this is a result of traditional
hydroplaning...but rather as a lesser level of 'lubrication' between
the rail and wheel...

ck
--
The Ten Commandments display was removed from the Alabama Supreme Court
building, But here was a good reason for the move.*

You can't post "Thou Shalt Not Steal" in a building full of lawyers and
politicians without creating a hostile work environment.

Edna H. on alt.books.m-lackey, 20030930