math question for jobst

1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

On Aug 17, 9:44*pm, jim beam wrote:
1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

On Aug 17, 9:15*pm, "
wrote:
On Aug 17, 9:44*pm, jim beam wrote:

1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

Seems that Jim has a beef with Jobst regarding cable elongation on a
post a few days ago in which OP was having a problem with his brakes.
Jim, clearly the OP's problem was not cable stretch as he recently
posted his stopping power has much increased after performing some of
the suggested maintenance in followup posts, however he did NOT
replace the cables.

-Tom

TT wrote:
[...]
Seems that Jim has a beef with Jobst[...]

That is the crux of the matter.

--
Tom Sherman - 42.435731,-83.985007
Celebrity culture is an opposite of community, informing us
that these few nonsense-heads matter but that the rest of
us do not. - Jay Griffiths

On 18 Ago, 07:57, Tom Sherman °_°
wrote:
TT wrote:
Seems that Jim has a beef with Jobst[...]
That is the crux of the matter.

Bolinig down to a minor issue.
jb being envious of JB's patented capital letters.

Sergio
Pisa

TT wrote:
On Aug 17, 9:15�pm, "
wrote:
On Aug 17, 9:44�pm, jim beam wrote:

1.6mm cable diameter.
1000N applied force.
160cm cable length.
what is the elastic elongation of that cable with this load?
assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.
Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

Seems that Jim has a beef with Jobst regarding cable elongation on a
post a few days ago in which OP was having a problem with his brakes.
Jim, clearly the OP's problem was not cable stretch as he recently
posted his stopping power has much increased after performing some of
the suggested maintenance in followup posts, however he did NOT
replace the cables.

-Tom

indeed, basic prep solves most braking problems. but this bull**** from
jobst that brake cable evidences no elasticity is completely
fundamentally wrong.

wrote:
On Aug 17, 9:44�pm, jim beam wrote:
1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

50lb pull [your number, is it not?] ~= 25kg ~= 250N. most road levers
are a 6:1 ratio, but even at 4:1...

On Tue, 18 Aug 2009 06:29:22 -0700, jim beam wrote:

wrote:
On Aug 17, 9:44?pm, jim beam wrote:
1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

50lb pull [your number, is it not?] ~= 25kg ~= 250N. most road levers
are a 6:1 ratio, but even at 4:1...

Dear Jim,

Who needs to apply 1000 N through a _1.6 meter_ _rear_ brake cable?

Cheers,

Carl Fogel

On Tue, 18 Aug 2009 09:40:29 -0600, carlfogel wrote:

On Tue, 18 Aug 2009 06:29:22 -0700, jim beam wrote:

wrote:
On Aug 17, 9:44?pm, jim beam wrote:
1.6mm cable diameter.
1000N applied force.
160cm cable length.

what is the elastic elongation of that cable with this load?

assume elasticity of steel = 193GPa
the formula you need to calculate this is in your own book.

Dear Jim,

Who needs to apply 1000N through a 1.6 meter rear brake cable?

Cheers,

Carl Fogel

50lb pull [your number, is it not?] ~= 25kg ~= 250N. most road levers
are a 6:1 ratio, but even at 4:1...

Dear Jim,

Who needs to apply 1000 N through a _1.6 meter_ _rear_ brake cable?

Cheers,

Carl Fogel

two very heavy tandem riders?

Carl Fogel wrote:

jim beam wrote:

Carl Fogel wrote:

Who needs to apply 1000N through a 1.6 meter rear brake cable?

50lb pull [your number, is it not?] ~= 25kg ~= 250N. *most road levers
are a 6:1 ratio, but even at 4:1...

Who needs to apply 1000 N through a _1.6 meter_ _rear_ brake cable?

Based on my experience, someone using a rear drum brake might need to
plan for that much length and tension and resultant stretch.

When added to casing compression, deflection in the cable anchor
points, flex in the actuator arm, and squishing brake shoes, bottoming
out the lever is one of the more problematic issues with drum brakes.
Drums really want the mutually exclusive combination of long cable
throw and high gain, which sharply limits the selection of
satisfactory levers.

Using 19-strand drawn cable is a good first step to getting decent
performance from drums.

Chalo