hot pump barrel

John Forrest Tomlinson said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

Dear John,

It's normal.

Any pump heats up because gas heats up as you compress it.

Try a few other pumps and you'll see how the bottom end (where the
compression takes place) heats up.

If the barrel is metal, the heat is conducted up toward the other end
of the pump. Plastic barrels conduct heat poorly, so the effect isn't
as likely to be noticed.

When I switched from a plastic Zefal mini-pump to a metal Topeak Road
Morph, the difference in how hot the pump got where I held it was
striking.

Cheers,

Carl Fogel

John Forrest Tomlinson said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

I believe this is quite normal; my RoadMorph did the same thing over the
weekend pumping up a friend's tire.

The increased air pressure in the pump barrel causes heating, similar to how
the decreased air pressure when you open up the relief valve on an air
compressor causes a rapid drop in temperature inside the compressor.

<http://en.wikipedia.org/wiki/Boyle%27s_Law>

--

__o Kristian Zoerhoff
_'\(,_ [email hidden]
(_)/ (_)

John Forrest Tomlinson said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

http://en.wikipedia.org/wiki/Adiabatic_process#Adiabatic_heating_and_cooling

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary

In article
<[email hidden]>,
John Forrest Tomlinson <[email hidden]>

Quoted message said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

Air molecules bounce off of the moving piston face with
more energy than they had before impact.

--
Michael Press

John Forrest Tomlinson said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

I think you are just blowing hot air! 😉

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com

On Jul 18, 2:14 pm, John Forrest Tomlinson <[email hidden]>

Quoted message said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?
--
JT
****************************
Remove "remove" to reply
Visithttp://www.jt10000.com
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Adiabatic heating, see: http://en.wikipedia.org/wiki/Adiabatic_heating

Mike Jenkins

On Jul 18, 12:14 pm, John Forrest Tomlinson <[email hidden]>

Quoted message said:

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

If you lubricate the rubber parts with petrolium based lubricants they
will expand and the pump will no longer work!

That said, also be careful not to pump the tire too fast as it
overheats the rubber and it becomes soft and rolls off of the shaft
and the pump will no longer work.

On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>

Quoted message said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?
--
JT

Now you know how diesel engines get away with using no spark plugs.

Leland Yee

On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>

Quoted message said:

On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>

Quoted message said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

Quoted message said:

Now you know how diesel engines get away with using no spark plugs.

I didn't know diesel engines have no sparks plugs.
--
JT
****************************
Remove "remove" to reply
Visit http://www.jt10000.com
****************************

In article <[email hidden]>,

John Forrest Tomlinson said:

On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>
wrote:

I didn't know diesel engines have no sparks plugs.

http://en.wikipedia.org/wiki/Glow_plug

_ Booker C. Bense

On Thu, 19 Jul 2007 17:16:47 -0000, Rex Kerr <[email hidden]>

Quoted message said:

If you lubricate the rubber parts with petrolium based lubricants they
will expand

That said, also be careful not to pump too fast as it
overheats the rubber and it becomes soft and rolls off of the shaft

Ahem, family newsgroup...

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary

Kinky Cowboy said:

On Thu, 19 Jul 2007 17:16:47 -0000, Rex Kerr <[email hidden]>
wrote:

Quoted message said:

Quoted message said:

That said, also be careful not to pump too fast as it
overheats the rubber and it becomes soft and rolls off of the shaft

Quoted message said:

Ahem, family newsgroup...

Well done, Grasshopper.

John Forrest Tomlinson said:

On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>

Quoted message said:

On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>

Quoted message said:

Well, I guess I jinxed myself by saying how rarely I use it - today I
got a flat tire and used a Zefal HPX pump. While pumping, I noticed
the pump barrel became quite hot.

Is that normal? Should I perhaps lubricate the washer inside to
reduce friction? If so, what should I use?

Quoted message said:

Now you know how diesel engines get away with using no spark plugs.

I didn't know diesel engines have no sparks plugs.

Rudolf Diesel obviously had a much better PR agent than Nikolaus Otto.
Almost everyone refers to the compression ignition engine as a "diesel",
while the four-stoke spark ignition engine is hardly ever called an "otto".

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com

Johnny Sunset aka Tom Sherman said:

John Forrest Tomlinson said:

On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>

Quoted message said:

On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>
wrote:

> Well, I guess I jinxed myself by saying how rarely I use it - today I
> got a flat tire and used a Zefal HPX pump. While pumping, I noticed
> the pump barrel became quite hot.
>
> Is that normal? Should I perhaps lubricate the washer inside to
> reduce friction? If so, what should I use?

Quoted message said:

Now you know how diesel engines get away with using no spark plugs.

I didn't know diesel engines have no sparks plugs.

Rudolf Diesel obviously had a much better PR agent than Nikolaus Otto.
Almost everyone refers to the compression ignition engine as a "diesel",
while the four-stoke spark ignition engine is hardly ever called an "otto".

Obviously you never sat through any (long, tedious) thermodynamics
classes. Now the poor [censored] that invented the two-stroke is the one
who got the PR shaft (I don't even remember his name.)

nate

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Nate Nagel said:

Johnny Sunset aka Tom Sherman said:

John Forrest Tomlinson said:

On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>
wrote:

> On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>
> wrote:
>
>> Well, I guess I jinxed myself by saying how rarely I use it - today I
>> got a flat tire and used a Zefal HPX pump. While pumping, I noticed
>> the pump barrel became quite hot.
>>
>> Is that normal? Should I perhaps lubricate the washer inside to
>> reduce friction? If so, what should I use?

> Now you know how diesel engines get away with using no spark plugs.

I didn't know diesel engines have no sparks plugs.

Rudolf Diesel obviously had a much better PR agent than Nikolaus Otto.
Almost everyone refers to the compression ignition engine as a
"diesel", while the four-stoke spark ignition engine is hardly ever
called an "otto".

Obviously you never sat through any (long, tedious) thermodynamics
classes.

???

Quoted message said:

Now the poor [censored] that invented the two-stroke is the one
who got the PR shaft (I don't even remember his name.)

Joseph Day (spark ignition) and Dugald Clark (compression ignition),
which reminds me there is nothing like the sound of a 2-stroke V-6
Detroit Diesel [1].

[1] <http://www.telusplanet.net/public/ryq/6V-53_on_dyno.mp3>.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

--
Posted via a free Usenet account from http://www.teranews.com

Johnny Sunset aka Tom Sherman said:

Nate Nagel said:

Johnny Sunset aka Tom Sherman said:

John Forrest Tomlinson wrote:

> On Thu, 19 Jul 2007 20:58:18 -0000, Leland Yee <[email hidden]>
> wrote:
>
>> On Jul 18, 3:14 pm, John Forrest Tomlinson <[email hidden]>
>> wrote:
>>
>>> Well, I guess I jinxed myself by saying how rarely I use it - today I
>>> got a flat tire and used a Zefal HPX pump. While pumping, I noticed
>>> the pump barrel became quite hot.
>>>
>>> Is that normal? Should I perhaps lubricate the washer inside to
>>> reduce friction? If so, what should I use?
>
>
>
>> Now you know how diesel engines get away with using no spark plugs.
>
>
>
> I didn't know diesel engines have no sparks plugs.

Rudolf Diesel obviously had a much better PR agent than Nikolaus
Otto. Almost everyone refers to the compression ignition engine as a
"diesel", while the four-stoke spark ignition engine is hardly ever
called an "otto".

Obviously you never sat through any (long, tedious) thermodynamics
classes.

???

I remember the names Otto and Diesel being frequently mentioned in
reference to various thermodynamic cycles, along with Carnot, Stirling,
etc. etc. etc...

Quoted message said:

Quoted message said:

Now the poor [censored] that invented the two-stroke is the one who got
the PR shaft (I don't even remember his name.)

Joseph Day (spark ignition) and Dugald Clark (compression ignition),
which reminds me there is nothing like the sound of a 2-stroke V-6
Detroit Diesel [1].

[1] <http://www.telusplanet.net/public/ryq/6V-53_on_dyno.mp3>.

I'm a bit partial to the good old fashioned Otto engine, myself, but
there are so many that make wonderful yet delightfully distinct noises.
I guess favorites at the moment would be a high-compression Studebaker
V-8 (which I can indulge myself in) and probably a Porsche flat-six
(which I can't; so when I have the opportunity I roll the windows down
and tell passengers to shut the heck up <G>😉

nate

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