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#1 (permalink) Old 12-21-2011, 02:47 PM
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handbrake theory ?!

ok peeps, this is my original post:
http://www.bimmerwerkz.com/forum/3-s...che-75113.html

i have a theory!!!!
i did a routine check on the brakes today and did a drop link (nightmare)
i noticed the disc , despite being greased well enough to slide off, didn't.
is it possible that what has happened is that the adjuster for the parking brake shoes is set too far that the shoes are literally sitting on the disc when the handbrake is not on?
so when the handbrake is released there is not enough pull in the springs on the shoes to pull them away from the disc. effectively allowing them to seize to the disc.
still not sure why the cars rolls though......................
if anyone could give me a bit of a low down it would be helpful
and of course
merry christmas
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#2 (permalink) Old 12-21-2011, 02:57 PM
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Quite possible mate... The cables have adjusters on them, if this doesn't release them then there will be an internal fault !


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#3 (permalink) Old 12-21-2011, 03:00 PM
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yeah meant to take a pic but i was caked in grease and oil and blood. didn't want it on touch screen phone. but the disc was bitch to get off. doing the other one tomorrow so will have a look.
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#4 (permalink) Old 12-22-2011, 06:27 PM
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i also have a theory,as to why gluons and W and Z bosons have a ltd range.
W and Z bosons are exhange bosons. The appear do there job and disapear again. The uncertainty pricinciple governs this. high mass short range. Gluons are confined by their nature. I will let someone else explain that one. The energy "borrowed" to create this particle must be "paid" back with a set time. Given these particles travel at neary the speed of light the following can be said.

Uncertainity principle states
ΔxΔp ≥ h/(4*pi) or

ΔEΔt ≥ h/(4*pi)

ΔEΔt = mc^2Δt ≥ h/(4*pi)

Virtual particles are travelling close to c so:

Range ≈ cΔt ≥ h/(4*pi*m*c)

Given the mass of a W boson is 80.4 Gev that works out to be 1.43E-25 kg. That gives a range of 1.2E-18 m. The same goes for the slightly more massive Z boson.

Last edited by jimmythepie; 12-22-2011 at 06:28 PM. Reason: spelling,oops
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#5 (permalink) Old 12-23-2011, 02:53 PM
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Quote:
Originally Posted by jimmythepie View Post
i also have a theory,as to why gluons and W and Z bosons have a ltd range.
W and Z bosons are exhange bosons. The appear do there job and disapear again. The uncertainty pricinciple governs this. high mass short range. Gluons are confined by their nature. I will let someone else explain that one. The energy "borrowed" to create this particle must be "paid" back with a set time. Given these particles travel at neary the speed of light the following can be said.

Uncertainity principle states
ΔxΔp ≥ h/(4*pi) or

ΔEΔt ≥ h/(4*pi)

ΔEΔt = mc^2Δt ≥ h/(4*pi)

Virtual particles are travelling close to c so:

Range ≈ cΔt ≥ h/(4*pi*m*c)

Given the mass of a W boson is 80.4 Gev that works out to be 1.43E-25 kg. That gives a range of 1.2E-18 m. The same goes for the slightly more massive Z boson.
Would this be a tangent, by any chance?


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#6 (permalink) Old 01-10-2012, 10:58 AM
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Quote:
Originally Posted by jimmythepie View Post
i also have a theory,as to why gluons and W and Z bosons have a ltd range.
W and Z bosons are exhange bosons. The appear do there job and disapear again. The uncertainty pricinciple governs this. high mass short range. Gluons are confined by their nature. I will let someone else explain that one. The energy "borrowed" to create this particle must be "paid" back with a set time. Given these particles travel at neary the speed of light the following can be said.

Uncertainity principle states
ΔxΔp ≥ h/(4*pi) or

ΔEΔt ≥ h/(4*pi)

ΔEΔt = mc^2Δt ≥ h/(4*pi)

Virtual particles are travelling close to c so:

Range ≈ cΔt ≥ h/(4*pi*m*c)

Given the mass of a W boson is 80.4 Gev that works out to be 1.43E-25 kg. That gives a range of 1.2E-18 m. The same goes for the slightly more massive Z boson.
uhh?
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