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-   -   How does a differential work? (http://www.peachparts.com/shopforum/off-topic-discussion/271060-how-does-differential-work.html)

cmac2012 02-07-2010 04:44 PM

Quote:

Originally Posted by kerry (Post 2400421)
I think it has less to do with time and place and more to do with a sharp person who understood differntials and knew how to communicate that knowledge effectively in a very simple manner. I think that a pretty high percentage of people who knew exactly how and why differentials worked couldn't have come up with that simple model to explain it to the ignorant.
I've looked at a number of differentials in my day, saw what was happening but didn't understand it.

That was some pretty nifty model making in that piece. Someone put some time into that.

Jorn 02-07-2010 05:00 PM

Last Friday night during the rain I did a 90* on the 110 freeway off/on ramp towards the 101 and landed face up on a mud hill facing the 101 above me.

What I think happened was that when coming out of the curve I gave to much gas and at the same time hitting a large pile of dirt/mud on the pavement making the drivers side rear wheel spin. The psg side rear wheel doing all the work now pushing me to the left of the the road doing a 90* upwards off the road.

Would a "Limited slip differential" have made a difference?

cmac2012 02-07-2010 05:09 PM

I would think probably but I'm not certain.

okyoureabeast 02-07-2010 05:22 PM

The Differential and YOU!

One of the things that annoys me from old news reels is the music. Old WW2 reels had the worst music underneath.

That however was one of the best videos I have ever seen.

MS Fowler 02-07-2010 06:49 PM

Quote:

Originally Posted by cmac2012 (Post 2400590)
Another favorite canard of the right.

. . . thought less of the poor little dears' self image . . .


People can get damaged for life by overbearing, cruel people. Why are some people filled with self-confidence and courage while others are afraid to take risks? A bit of attention to this subject strikes me as a worthy task.

A little attention, OK, but not at the cost of real achievement, or success. Not keeping score, giving everyone a participation award, giving inflated grades really doesn't fool anyone. The kids know who are the smart ones, and who aren't.

cmac2012 02-07-2010 10:23 PM

Quote:

Originally Posted by MS Fowler (Post 2400670)
A little attention, OK, but not at the cost of real achievement, or success. Not keeping score, giving everyone a participation award, giving inflated grades really doesn't fool anyone. The kids know who are the smart ones, and who aren't.

This business of giving out trophies for showing up was not run by me for approval in advance. It has gotten a bit overmuch. But this notion is raised all the times by critics of public education, none of whom are willing to put up with the grief of being a teacher for $50K or less per year.

Let Limbaugh try to teach in public schools for 5 years, I mean really try and I'll give the malarkey that he spouts and righties one and all parrot some credence.

MS Fowler 02-08-2010 07:07 AM

Quote:

Originally Posted by cmac2012 (Post 2400770)
This business of giving out trophies for showing up was not run by me for approval in advance. It has gotten a bit overmuch. But this notion is raised all the times by critics of public education, none of whom are willing to put up with the grief of being a teacher for $50K or less per year.

Let Limbaugh try to teach in public schools for 5 years, I mean really try and I'll give the malarkey that he spouts and righties one and all parrot some credence.

My wife is a certified substitute teacher with a BS degree. I hear the horror stories every day she subs. One of my best friends is a career teacher, so I have a pretty good idea of what goes on in school.
I wouldn't last half a day before being up on assault charges.
The kids know that ALL the rules favor them, and that there are no consequences for any of their behavior. Even if the get suspended--its what they want-- no school. Their parents are illiterate, and do not encourage their children. One older sibling actually pays his kid brother for failing tests and getting into trouble. With family like that, how can anyone suceed?

Kuan 02-08-2010 08:36 AM

I thought they were gonna use motorcycles to explain the whole damn thing, but anyway, the spokes explanation was pretty good.

MS Fowler 02-08-2010 09:14 AM

Quote:

Originally Posted by Kuan (Post 2400951)
I thought they were gonna use motorcycles to explain the whole damn thing, but anyway, the spokes explanation was pretty good.

Well, they did use the motorcycles to demonstrate how the outside wheel travels farther, and faster than the inside wheel. Other than that, I saw no purpose, other than entertainment value, to the stunt riders.

R Leo 02-08-2010 09:19 AM

Quote:

Originally Posted by kerry (Post 2400421)
I think it has less to do with time and place and more to do with a sharp person who understood differntials and knew how to communicate that knowledge effectively in a very simple manner. I think that a pretty high percentage of people who knew exactly how and why differentials worked couldn't have come up with that simple model to explain it to the ignorant.

It goes along with what I've always said about the biggest problems in learning mathematics is that it's almost always taught by mathematicians.

HuskyMan 02-08-2010 01:10 PM

Quote:

Originally Posted by MS Fowler (Post 2400923)
My wife is a certified substitute teacher with a BS degree. I hear the horror stories every day she subs. One of my best friends is a career teacher, so I have a pretty good idea of what goes on in school.
I wouldn't last half a day before being up on assault charges.
The kids know that ALL the rules favor them, and that there are no consequences for any of their behavior. Even if the get suspended--its what they want-- no school. Their parents are illiterate, and do not encourage their children. One older sibling actually pays his kid brother for failing tests and getting into trouble. With family like that, how can anyone suceed?

might it have started with Roosevelt's "New Deal" and then progressed onward and downward with LBJ's "the Great Society"? the powers that be have determined that the children should be not held responsible for anything. as a matter of fact, the school system has done a 180 in that the system now REWARDS little Johnnie and Susie for acting out.

several years ago, I met a retired school teacher who had spent 30+ years teaching in the public school system. she said teaching jobs had been converted to baby sitting jobs. emphasis on the baby part.

when people offload their parental responsibilities to the "state", why are they surprised when it doesn't turn out well?

HuskyMan 02-08-2010 01:21 PM

Quote:

Originally Posted by Jorn (Post 2400603)
Last Friday night during the rain I did a 90* on the 110 freeway off/on ramp towards the 101 and landed face up on a mud hill facing the 101 above me.

What I think happened was that when coming out of the curve I gave to much gas and at the same time hitting a large pile of dirt/mud on the pavement making the drivers side rear wheel spin. The psg side rear wheel doing all the work now pushing me to the left of the the road doing a 90* upwards off the road.

Would a "Limited slip differential" have made a difference?

just curious on this one. does the W126 have a limited slip differential and might it make a difference in this type of situation?

kerry 02-08-2010 01:27 PM

Quote:

Originally Posted by R Leo (Post 2400976)
It goes along with what I've always said about the biggest problems in learning mathematics is that it's almost always taught by mathematicians.

I've sat on a number of math hiring committees and have been repeatedly impressed by the inability of highly educated mathematicians to teach their way out of a paper bag. I can remember one committee which tasked all candidates to teach a twenty minute lesson on a limit in calculus. The only one that made any sense began with "Imagine an apple pie in an oven. . ." He got the job.

MS Fowler 02-08-2010 03:27 PM

Quote:

Originally Posted by kerry (Post 2401144)
I've sat on a number of math hiring committees and have been repeatedly impressed by the inability of highly educated mathematicians to teach their way out of a paper bag. I can remember one committee which tasked all candidates to teach a twenty minute lesson on a limit in calculus. The only one that made any sense began with "Imagine an apple pie in an oven. . ." He got the job.

I must have had one of the other candidates as my calculus instructor.

RadioTek 02-08-2010 06:21 PM

With the mindset of the system teaching to the high value test, the concept of how or why something works is given short shrift.


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