CycleBanter.com

CycleBanter.com (http://www.cyclebanter.com/index.php)
-   Techniques (http://www.cyclebanter.com/forumdisplay.php?f=8)
-   -   Curiosity Killed the Cat (http://www.cyclebanter.com/showthread.php?t=252010)

[email protected] January 12th 17 09:22 PM

Curiosity Killed the Cat
 
Frank,

With all of this talk about heating the bottom bracket to get it apart why didn't you explain and show the calculation that demonstrated that the steel cup and the aluminum bottom bracket tube hung on an aluminum frame would have a difference in expansion of a couple of thousandths of an inch max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower conduction rate would be getting warmer than the frame with aluminum having between four and six times the heat conduction of hardened steel and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things from using a hair dryer to a welding torch trying to light the frame on fire.

Since an 80 C warming difference in expansion would only be a couple mils and what normally jams these cups in is rust expansion from water leaking down the seat tube and onto the threads that are slightly in the open part of the seat tube and bottom bracket interface, this expansion can easily be twice or more what the expansion could ever achieve even if you could get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted with everything from lighting his frame on fire to pounding it into flakes with a hammer was pretty entertaining as long as you weren't Ted unaware that most of the help here isn't since the exit of Jobst and Sheldon.

Doug Landau January 12th 17 09:31 PM

Curiosity Killed the Cat
 
On Thursday, January 12, 2017 at 1:22:14 PM UTC-8, wrote:
Frank,

With all of this talk about heating the bottom bracket to get it apart why didn't you explain and show the calculation that demonstrated that the steel cup and the aluminum bottom bracket tube hung on an aluminum frame would have a difference in expansion of a couple of thousandths of an inch max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower conduction rate would be getting warmer than the frame with aluminum having between four and six times the heat conduction of hardened steel and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things from using a hair dryer to a welding torch trying to light the frame on fire.

Since an 80 C warming difference in expansion would only be a couple mils and what normally jams these cups in is rust expansion from water leaking down the seat tube and onto the threads that are slightly in the open part of the seat tube and bottom bracket interface, this expansion can easily be twice or more what the expansion could ever achieve even if you could get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted with everything from lighting his frame on fire to pounding it into flakes with a hammer was pretty entertaining as long as you weren't Ted unaware that most of the help here isn't since the exit of Jobst and Sheldon.


How does the title of this thread relate to the subject?


Benderthe.evilrobot January 12th 17 09:34 PM

Curiosity Killed the Cat
 

wrote in message
...
Frank,

With all of this talk about heating the bottom bracket to get it apart why
didn't you explain and show the calculation that demonstrated that the
steel cup and the aluminum bottom bracket tube hung on an aluminum frame
would have a difference in expansion of a couple of thousandths of an inch
max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower
conduction rate would be getting warmer than the frame with aluminum
having between four and six times the heat conduction of hardened steel
and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things
from using a hair dryer to a welding torch trying to light the frame on
fire.

Since an 80 C warming difference in expansion would only be a couple mils
and what normally jams these cups in is rust expansion from water leaking
down the seat tube and onto the threads that are slightly in the open part
of the seat tube and bottom bracket interface, this expansion can easily
be twice or more what the expansion could ever achieve even if you could
get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted
with everything from lighting his frame on fire to pounding it into flakes
with a hammer was pretty entertaining as long as you weren't Ted unaware
that most of the help here isn't since the exit of Jobst and Sheldon.


As usual; you've painted a very different picture to what was actually said.


[email protected] January 12th 17 09:49 PM

Curiosity Killed the Cat
 
On Thursday, January 12, 2017 at 1:31:51 PM UTC-8, Doug Landau wrote:
On Thursday, January 12, 2017 at 1:22:14 PM UTC-8, wrote:
Frank,

With all of this talk about heating the bottom bracket to get it apart why didn't you explain and show the calculation that demonstrated that the steel cup and the aluminum bottom bracket tube hung on an aluminum frame would have a difference in expansion of a couple of thousandths of an inch max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower conduction rate would be getting warmer than the frame with aluminum having between four and six times the heat conduction of hardened steel and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things from using a hair dryer to a welding torch trying to light the frame on fire.

Since an 80 C warming difference in expansion would only be a couple mils and what normally jams these cups in is rust expansion from water leaking down the seat tube and onto the threads that are slightly in the open part of the seat tube and bottom bracket interface, this expansion can easily be twice or more what the expansion could ever achieve even if you could get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted with everything from lighting his frame on fire to pounding it into flakes with a hammer was pretty entertaining as long as you weren't Ted unaware that most of the help here isn't since the exit of Jobst and Sheldon.


How does the title of this thread relate to the subject?


Doug, are you unaware that Frank is a mechanical engineer who could have readily calculated the difference in expansion rates across an inch and an half adjustable cup, known the difference in the coefficient of expansion the lack of heat conduction across the thread barrier and the extreme difficulty in getting an aluminum frame to heat more than the steel bottom bracket cup?

If you do not understand these and these lunatic suggestions to Ted on how to "loosen" his bottom bracket I don't have to wonder why YOU don't have any curiosity about it.

I can only conclude that Frank was getting a good laugh at everyone else but me and Andrew. Luckily Ted seemed to take it all in good humor.

[email protected] January 12th 17 09:49 PM

Curiosity Killed the Cat
 
On Thursday, January 12, 2017 at 1:34:37 PM UTC-8, Benderthe.evilrobot wrote:
wrote in message
...
Frank,

With all of this talk about heating the bottom bracket to get it apart why
didn't you explain and show the calculation that demonstrated that the
steel cup and the aluminum bottom bracket tube hung on an aluminum frame
would have a difference in expansion of a couple of thousandths of an inch
max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower
conduction rate would be getting warmer than the frame with aluminum
having between four and six times the heat conduction of hardened steel
and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things
from using a hair dryer to a welding torch trying to light the frame on
fire.

Since an 80 C warming difference in expansion would only be a couple mils
and what normally jams these cups in is rust expansion from water leaking
down the seat tube and onto the threads that are slightly in the open part
of the seat tube and bottom bracket interface, this expansion can easily
be twice or more what the expansion could ever achieve even if you could
get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted
with everything from lighting his frame on fire to pounding it into flakes
with a hammer was pretty entertaining as long as you weren't Ted unaware
that most of the help here isn't since the exit of Jobst and Sheldon.


As usual; you've painted a very different picture to what was actually said.


And as usual you don't even remember your last postings. Why don't you go hit your bike with a hammer.

Benderthe.evilrobot January 12th 17 09:56 PM

Curiosity Killed the Cat
 

wrote in message
...
On Thursday, January 12, 2017 at 1:34:37 PM UTC-8, Benderthe.evilrobot
wrote:
wrote in message
...
Frank,

With all of this talk about heating the bottom bracket to get it apart
why
didn't you explain and show the calculation that demonstrated that the
steel cup and the aluminum bottom bracket tube hung on an aluminum
frame
would have a difference in expansion of a couple of thousandths of an
inch
max even if you COULD get the aluminum to heat faster than the steel
cup?

After all, if you blow hot air down there the steel cup with a much
lower
conduction rate would be getting warmer than the frame with aluminum
having between four and six times the heat conduction of hardened steel
and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these
things
from using a hair dryer to a welding torch trying to light the frame on
fire.

Since an 80 C warming difference in expansion would only be a couple
mils
and what normally jams these cups in is rust expansion from water
leaking
down the seat tube and onto the threads that are slightly in the open
part
of the seat tube and bottom bracket interface, this expansion can
easily
be twice or more what the expansion could ever achieve even if you
could
get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor
Ted
with everything from lighting his frame on fire to pounding it into
flakes
with a hammer was pretty entertaining as long as you weren't Ted
unaware
that most of the help here isn't since the exit of Jobst and Sheldon.


As usual; you've painted a very different picture to what was actually
said.


And as usual you don't even remember your last postings. Why don't you go
hit your bike with a hammer.


Why not - you've already hit your head with one.


AMuzi January 12th 17 10:00 PM

Curiosity Killed the Cat
 
On 1/12/2017 3:31 PM, Doug Landau wrote:
On Thursday, January 12, 2017 at 1:22:14 PM UTC-8, wrote:
Frank,

With all of this talk about heating the bottom bracket to get it apart why didn't you explain and show the calculation that demonstrated that the steel cup and the aluminum bottom bracket tube hung on an aluminum frame would have a difference in expansion of a couple of thousandths of an inch max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower conduction rate would be getting warmer than the frame with aluminum having between four and six times the heat conduction of hardened steel and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things from using a hair dryer to a welding torch trying to light the frame on fire.

Since an 80 C warming difference in expansion would only be a couple mils and what normally jams these cups in is rust expansion from water leaking down the seat tube and onto the threads that are slightly in the open part of the seat tube and bottom bracket interface, this expansion can easily be twice or more what the expansion could ever achieve even if you could get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted with everything from lighting his frame on fire to pounding it into flakes with a hammer was pretty entertaining as long as you weren't Ted unaware that most of the help here isn't since the exit of Jobst and Sheldon.


How does the title of this thread relate to the subject?


Long leadup to:

Mrs Schrodinger asked, "What have you done to the cat? She
looks half-dead."

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



Doug Landau January 12th 17 10:37 PM

Curiosity Killed the Cat
 
On Thursday, January 12, 2017 at 1:49:12 PM UTC-8, wrote:
On Thursday, January 12, 2017 at 1:31:51 PM UTC-8, Doug Landau wrote:
On Thursday, January 12, 2017 at 1:22:14 PM UTC-8, wrote:
Frank,

With all of this talk about heating the bottom bracket to get it apart why didn't you explain and show the calculation that demonstrated that the steel cup and the aluminum bottom bracket tube hung on an aluminum frame would have a difference in expansion of a couple of thousandths of an inch max even if you COULD get the aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much lower conduction rate would be getting warmer than the frame with aluminum having between four and six times the heat conduction of hardened steel and there only being a 44% difference in expansion rates to begin with.

This is something that's right up your alley while we had all these things from using a hair dryer to a welding torch trying to light the frame on fire.

Since an 80 C warming difference in expansion would only be a couple mils and what normally jams these cups in is rust expansion from water leaking down the seat tube and onto the threads that are slightly in the open part of the seat tube and bottom bracket interface, this expansion can easily be twice or more what the expansion could ever achieve even if you could get the bottom bracket significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor Ted with everything from lighting his frame on fire to pounding it into flakes with a hammer was pretty entertaining as long as you weren't Ted unaware that most of the help here isn't since the exit of Jobst and Sheldon.


How does the title of this thread relate to the subject?


Doug, are you unaware that Frank is a mechanical engineer who could have readily calculated the difference in expansion rates across an inch and an half adjustable cup, known the difference in the coefficient of expansion the lack of heat conduction across the thread barrier and the extreme difficulty in getting an aluminum frame to heat more than the steel bottom bracket cup?


I am aware of that, Tom! I am also aware that Frank likes to debate and is good at it and tends to not play all his cards at once. He might well have ran the calculation and then not disclosed the #s, thus far.

https://www.youtube.com/watch?v=TFxcJp2VQPU



Tim McNamara January 13th 17 12:00 AM

Curiosity Killed the Cat
 
On Thu, 12 Jan 2017 16:00:13 -0600, AMuzi wrote:
On 1/12/2017 3:31 PM, Doug Landau wrote:

How does the title of this thread relate to the subject?


Long leadup to:

Mrs Schrodinger asked, "What have you done to the cat? She looks
half-dead."


LOL! Post of the week!

James[_8_] January 13th 17 12:25 AM

Curiosity Killed the Cat
 
On 13/01/17 09:00, AMuzi wrote:
On 1/12/2017 3:31 PM, Doug Landau wrote:
On Thursday, January 12, 2017 at 1:22:14 PM UTC-8,
wrote:
Frank,

With all of this talk about heating the bottom bracket to get it
apart why didn't you explain and show the calculation that
demonstrated that the steel cup and the aluminum bottom bracket tube
hung on an aluminum frame would have a difference in expansion of a
couple of thousandths of an inch max even if you COULD get the
aluminum to heat faster than the steel cup?

After all, if you blow hot air down there the steel cup with a much
lower conduction rate would be getting warmer than the frame with
aluminum having between four and six times the heat conduction of
hardened steel and there only being a 44% difference in expansion
rates to begin with.

This is something that's right up your alley while we had all these
things from using a hair dryer to a welding torch trying to light the
frame on fire.

Since an 80 C warming difference in expansion would only be a couple
mils and what normally jams these cups in is rust expansion from
water leaking down the seat tube and onto the threads that are
slightly in the open part of the seat tube and bottom bracket
interface, this expansion can easily be twice or more what the
expansion could ever achieve even if you could get the bottom bracket
significantly warmer than the cup.

Or where you sitting back and enjoying the show? This assault on poor
Ted with everything from lighting his frame on fire to pounding it
into flakes with a hammer was pretty entertaining as long as you
weren't Ted unaware that most of the help here isn't since the exit
of Jobst and Sheldon.


How does the title of this thread relate to the subject?


Long leadup to:

Mrs Schrodinger asked, "What have you done to the cat? She looks
half-dead."


Which half?

--
JS


All times are GMT +1. The time now is 05:36 PM.
Home - Home - Home - Home - Home

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
CycleBanter.com