Sheldon Brown's website question

I don't know it (sorry) but have you tried to start here:

http://www.sheldonbrown.com/harris/hub.html

and use the www.sheldonbrown.com Googleoid search tool at the top of the page. The site is
exceptionally well linked together. I don't think it will take long to find an article of
interest.

Perhaps you meant the pages of articles broken down by type? In the Googleoid search tool at the
top of the page type "index" and press the "enter" key. HTH.

Kirby.

"Dan Daniel" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?

Anyone know the link? I can't find that page again. Thanks.

Dan Daniel said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?

Maybe http://www.sheldonbrown.com/articles.html ?

Dan Daniel said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?

Anyone know the link? I can't find that page again. Thanks.

http://sheldonbrown.com/articles

That page is also accessible via the alias:

http://captainbike.com

Another good way to find stuff on my site is to start at the Bicycle
Glossary...it has links to all of the articles.

http://sheldonbrown.com/glossary

Sheldon "Lynx" Brown
+-----------------------------------------------------+
| Oh, the cyclist and the runner should be friends, |
| Yes, the cyclist and the runner should be friends; |
| Some folks like to kick their heels, |
| Some folks like to spin their wheels, |
| But that's no reason why they can't be friends! |
| |
| Human-powered folks should stick together, |
| Non-polluting folks should get along; |
| If you agree with what I'm saying, |
| Won't you join me in my song? |
| -- Rogers & Brown |
+-----------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

Sheldon Brown said:

Dan Daniel said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?

Anyone know the link? I can't find that page again. Thanks.

http://sheldonbrown.com/articles

That's the one!!! Thanks. And thanks for the whole site. An amazing
collection and an amazing job.

Quoted message said:

That page is also accessible via the alias:

http://captainbike.com

Ah, maybe I got sent to this from a google search or something.

Quoted message said:

Quoted message said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?
Anyone know the link? I can't find that page again. Thanks.

http://sheldonbrown.com/articles
That page is also accessible via the alias:
http://captainbike.com
Another good way to find stuff on my site is to start at the Bicycle
Glossary...it has links to all of the articles.

I can't remember which page it's on, but it has a picture of you
pulling a rusty bicylce out of a river. Beside it, your caption
claims that you know why the tires on such a thing are still inflated.
Do explain.

Adam Rush said:

I can't remember which page it's on, but it has a picture of you
pulling a rusty bicylce out of a river. Beside it, your caption
claims that you know why the tires on such a thing are still inflated.
Do explain.

You're thinking of one of the photos on my personal Bicycle Page:

http://sheldonbrown.org/bicycle.html

I'm not in the photo, I took it though, way back in the (Yuck!) black
and white era.

The explanation of the intact tire being still inflated was that even
with a slow leak, since the bike was under water, the air could only
leak out until the air pressure inside equalled the water pressure
outside.

Once the bike was dragged to the surface (by persons unknown) the
pressure in the tire was greater than atmospheric pressure.

Felt like maybe 15-20 psi, which is consistent with the river depth nearby.

Sheldon "Figured It Out" Brown
+--------------------------------+
| Happy Reynolds Day! (5/31) |
+--------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

Dan Daniel said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?
Anyone know the link? I can't find that page again. Thanks.

Please try this link below:

http://www.sheldonbrown.com/articles.html

--

"Sheldon Brown" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Adam Rush said:

I can't remember which page it's on, but it has a picture of you
pulling a rusty bicylce out of a river. Beside it, your caption
claims that you know why the tires on such a thing are still inflated.
Do explain.

You're thinking of one of the photos on my personal Bicycle Page:

http://sheldonbrown.org/bicycle.html

I'm not in the photo, I took it though, way back in the (Yuck!) black
and white era.

The explanation of the intact tire being still inflated was that even
with a slow leak, since the bike was under water, the air could only
leak out until the air pressure inside equalled the water pressure
outside.

Once the bike was dragged to the surface (by persons unknown) the
pressure in the tire was greater than atmospheric pressure.

Felt like maybe 15-20 psi, which is consistent with the river depth

nearby.

Quoted message said:

Sheldon "Figured It Out" Brown
+--------------------------------+
| Happy Reynolds Day! (5/31) |
+--------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

And because we know that 1 inch of water is 0.036127 PSI we can work out
that if the bike was retrieved with 20 PSI in the tyres {and the tyres
didn't lose a significant amount of air after retreival} you can estimate
the depth it was submerged.

20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!

Also, as the bike was hauled to the surface it would have felt lighter
because when the bike was lying on the bottom of the river the tyres would
have been "flat", that is, the pressure the tyre inside would be the same as
the pressure outside. As the bike is hauled to the surface the pressure
outside the tyre decreases and the tyre"inflates", displacing a larger
volume of water.

Marty "Too much spare time" Wallace

On 05/31/2004 05:37 PM, in article
[email hidden], "Marty Wallace"

Quoted message said:

"Sheldon Brown" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Adam Rush said:

I can't remember which page it's on, but it has a picture of you
pulling a rusty bicylce out of a river. Beside it, your caption
claims that you know why the tires on such a thing are still inflated.
Do explain.

You're thinking of one of the photos on my personal Bicycle Page:

http://sheldonbrown.org/bicycle.html

I'm not in the photo, I took it though, way back in the (Yuck!) black
and white era.

The explanation of the intact tire being still inflated was that even
with a slow leak, since the bike was under water, the air could only
leak out until the air pressure inside equalled the water pressure
outside.

Once the bike was dragged to the surface (by persons unknown) the
pressure in the tire was greater than atmospheric pressure.

Felt like maybe 15-20 psi, which is consistent with the river depth

nearby.

Quoted message said:

Sheldon "Figured It Out" Brown
+--------------------------------+
| Happy Reynolds Day! (5/31) |
+--------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

And because we know that 1 inch of water is 0.036127 PSI we can work out
that if the bike was retrieved with 20 PSI in the tyres {and the tyres
didn't lose a significant amount of air after retreival} you can estimate
the depth it was submerged.

20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!

Also, as the bike was hauled to the surface it would have felt lighter
because when the bike was lying on the bottom of the river the tyres would
have been "flat", that is, the pressure the tyre inside would be the same as
the pressure outside. As the bike is hauled to the surface the pressure
outside the tyre decreases and the tyre"inflates", displacing a larger
volume of water.

Marty "Too much spare time" Wallace

Try again:

http://www.atozdiving.co.nz/waterpressure.html

20 PSI occurs at 146.815 inches (12 feet, 2.815 inches) depth.

You forget that at in 0 inches of water the PSI is will still be 1
atmosphere, or 14.6959 PSI.

--
Steven L. Sheffield
stevens at veloworks dot com
veloworks at worldnet dot ay tea tee dot net
bellum pax est libertas servitus est ignoratio vis est
ess ay ell tea ell ay kay ee sea aye tee why you ti ay aitch
aitch tee tea pea colon [for word] slash [four ward] slash double-you
double-yew double-ewe dot veloworks dot com [four word] slash

Steven L. Sheffield said:

On 05/31/2004 05:37 PM, in article
[email hidden], "Marty Wallace"
<[email hidden]> wrote:

Quoted message said:

Quoted message said:

Quoted message said:

The explanation of the intact tire being still inflated was that even
with a slow leak, since the bike was under water, the air could only
leak out until the air pressure inside equalled the water pressure
outside.

Quoted message said:

Quoted message said:

And because we know that 1 inch of water is 0.036127 PSI we can work out
that if the bike was retrieved with 20 PSI in the tyres {and the tyres
didn't lose a significant amount of air after retreival} you can estimate
the depth it was submerged.

20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!

Also, as the bike was hauled to the surface it would have felt lighter
because when the bike was lying on the bottom of the river the tyres would
have been "flat", that is, the pressure the tyre inside would be the same as
the pressure outside. As the bike is hauled to the surface the pressure
outside the tyre decreases and the tyre"inflates", displacing a larger
volume of water.

Quoted message said:

Try again:

http://www.atozdiving.co.nz/waterpressure.html

20 PSI occurs at 146.815 inches (12 feet, 2.815 inches) depth.

You forget that at in 0 inches of water the PSI is will still be 1
atmosphere, or 14.6959 PSI.

No need for him to "try again" since Marty got it right the first time.
When we measure the pressure in a bike tire it's really the "gauge
pressure" that we're using - i.e. the difference between the pressure
inside the tire and atmospheric pressure outside. So when Sheldon says
the tires had 20 psi, it means 20 psi above atmospheric; technically 20
psig (lbs per sq. in. gauge) which equals 34.7 psia (lbs per sq. in.
absolute). 20 psig occurs at a depth of just over 46 feet of water.

On Tue, 1 Jun 2004 07:37:27 +0800, "Marty Wallace" <[email hidden]>

Quoted message said:

20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!

Tube and tire permeability would result in an imperfect pressure
equalization; the tube would hold more pressure than something with
a gaping hole, although I suspect it would equalize given a long
enough period of time -- maybe longer than the tube would last,
though.
--
Rick Onanian

Quoted message said:

Quoted message said:

Quoted message said:

One time I stumbled across a single page at his site that had a large
'table of contents.' Seemed to list almost every article broken down
into various categories, etc. Might have even had a brief summary of
each article?
Anyone know the link? I can't find that page again. Thanks.

http://sheldonbrown.com/articles
That page is also accessible via the alias:
http://captainbike.com
Another good way to find stuff on my site is to start at the Bicycle
Glossary...it has links to all of the articles.

Adam Rush said:

I can't remember which page it's on, but it has a picture of you
pulling a rusty bicylce out of a river. Beside it, your caption
claims that you know why the tires on such a thing are still inflated.
Do explain.

Why shouldn't they be inflated?

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

Peter said:

Steven L. Sheffield said:

On 05/31/2004 05:37 PM, in article
[email hidden], "Marty Wallace"
<[email hidden]> wrote:

Quoted message said:

Quoted message said:

>The explanation of the intact tire being still inflated was that even
>with a slow leak, since the bike was under water, the air could only
>leak out until the air pressure inside equalled the water pressure
>outside.

Quoted message said:

Quoted message said:

And because we know that 1 inch of water is 0.036127 PSI we can work out
that if the bike was retrieved with 20 PSI in the tyres {and the tyres
didn't lose a significant amount of air after retreival} you can estimate
the depth it was submerged.

20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!

Also, as the bike was hauled to the surface it would have felt lighter
because when the bike was lying on the bottom of the river the tyres would
have been "flat", that is, the pressure the tyre inside would be the same as
the pressure outside. As the bike is hauled to the surface the pressure
outside the tyre decreases and the tyre"inflates", displacing a larger
volume of water.

Quoted message said:

Try again:

http://www.atozdiving.co.nz/waterpressure.html

20 PSI occurs at 146.815 inches (12 feet, 2.815 inches) depth.

You forget that at in 0 inches of water the PSI is will still be 1
atmosphere, or 14.6959 PSI.

No need for him to "try again" since Marty got it right the first time.
When we measure the pressure in a bike tire it's really the "gauge
pressure" that we're using - i.e. the difference between the pressure
inside the tire and atmospheric pressure outside. So when Sheldon says
the tires had 20 psi, it means 20 psi above atmospheric; technically 20
psig (lbs per sq. in. gauge) which equals 34.7 psia (lbs per sq. in.
absolute). 20 psig occurs at a depth of just over 46 feet of water.

Dear Peter, Steven, and Marty,

Bah! You cowards can squabble about PSI to three, four, or
six decimal places and debate physics.

I intend to wait for a post from some hero who will rope his
wheel to a cinder block, drop it in the deep end of al
swimming pool with 100 psi in the tire right after sticking
a pin in it, and let us know next week how much air remains
after he fishes it up again.

(Actually, I find this absurdly fascinating.)

Carl Fogel

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Peter said:

Steven L. Sheffield said:

On 05/31/2004 05:37 PM, in article
[email hidden], "Marty Wallace"
<[email hidden]> wrote:

Quoted message said:

>>The explanation of the intact tire being still inflated was that even
>>with a slow leak, since the bike was under water, the air could only
>>leak out until the air pressure inside equalled the water pressure
>>outside.

Quoted message said:

>And because we know that 1 inch of water is 0.036127 PSI we can work

out

Quoted message said:

Quoted message said:

Quoted message said:

>that if the bike was retrieved with 20 PSI in the tyres {and the tyres
>didn't lose a significant amount of air after retreival} you can

estimate

Quoted message said:

Quoted message said:

Quoted message said:

>the depth it was submerged.
>
>20 PSI divided by 0.036127 gives you 553 inches of water or 46 feet!
>
>Also, as the bike was hauled to the surface it would have felt lighter
>because when the bike was lying on the bottom of the river the tyres

would

Quoted message said:

Quoted message said:

Quoted message said:

>have been "flat", that is, the pressure the tyre inside would be the

same as

Quoted message said:

Quoted message said:

Quoted message said:

>the pressure outside. As the bike is hauled to the surface the pressure
>outside the tyre decreases and the tyre"inflates", displacing a larger
>volume of water.

Quoted message said:

Try again:

http://www.atozdiving.co.nz/waterpressure.html

20 PSI occurs at 146.815 inches (12 feet, 2.815 inches) depth.

You forget that at in 0 inches of water the PSI is will still be 1
atmosphere, or 14.6959 PSI.

No need for him to "try again" since Marty got it right the first time.
When we measure the pressure in a bike tire it's really the "gauge
pressure" that we're using - i.e. the difference between the pressure
inside the tire and atmospheric pressure outside. So when Sheldon says
the tires had 20 psi, it means 20 psi above atmospheric; technically 20
psig (lbs per sq. in. gauge) which equals 34.7 psia (lbs per sq. in.
absolute). 20 psig occurs at a depth of just over 46 feet of water.

Dear Peter, Steven, and Marty,

Bah! You cowards can squabble about PSI to three, four, or
six decimal places and debate physics.

I intend to wait for a post from some hero who will rope his
wheel to a cinder block, drop it in the deep end of al
swimming pool with 100 psi in the tire right after sticking
a pin in it, and let us know next week how much air remains
after he fishes it up again.

(Actually, I find this absurdly fascinating.)

Carl Fogel

Well when he dives in don't make him go too deep. When he freedives to a
depth of about 7 metres the air in his lungs compresses sufficiently to make
him lose buoyancy, (he displaces less water) and looses his ability to float
to the surface. This is why if you want to dispose of a body in the ocean or
a lake, you should make sure it's in deep water, otherwise it'll probably
just bob back to the surface.

Cheers

Marty