Why Do I Need 1000+ ft lbs in an Impact?

[MikeF2316]

i completely understand how they work, i am simply asking this b7labelle character to explain them, how they work, and how a regular extension does not do the same thing, only at an unspecified rate.

how bout it b7labelle?

how does a torque stick reduce applied torque when used on an impact, but transfer 100% when used on a breaker bar?its well understood concept, but i just gotta hear it.

Exactly. Any extension is just a torque stick with a high value. All else being equal, longer and thinner will give lower torque.

To use the spring analogy, a sports car and a stereotypical Cadillac going over the same pothole at the same speed transmits a totally different maximum force to the occupant of the vehicle. Softer springs = lower maximum force. The difference is made up by the lower force taking place over a longer time.

There's some high school physics in that.

 

[zkling]

how bout it b7labelle?

Come on b7labelle, give us the "I have an engineering degree" answer. I am waiting to see how little you truly learned during your degree.

Either admit you were wrong (multiple times) or give a proper answer. Only two options.

To use the spring analogy, a sports car and a stereotypical Cadillac going over the same pothole at the same speed transmits a totally different maximum force to the occupant of the vehicle. Softer springs = lower maximum force. The difference is made up by the lower force taking place over a longer time.

Are you referring to the difference in natural frequency between a sports car and typical road car?

 

[MikeF2316]

Are you referring to the difference in natural frequency between a sports car and typical road car?

Nope, just the spring rate. The harder spring will transmit a higher force to the sprung mass, but for a shorter time.

 

[Bull]

Come on b7labelle, give us the "I have an engineering degree" answer. I am waiting to see how little you truly learned during your degree.

Either admit you were wrong (multiple times) or give a proper answer. Only two options.



Are you referring to the difference in natural frequency between a sports car and typical road car?

I'm being serious: what's with this antagonistic and sort of "younger" approach to disagreement? It doesn't sit well with me. I don't know which of you two is correct because I know jack about science or math, but as an observer I can detect which approaches to debate are off-putting and which are productive.

 

[zkling]

Nope, just the spring rate. The harder spring will transmit a higher force to the sprung mass, but for a shorter time.

Right but what usually is considered for overall ride confortability is natural frequency (which is dependent on the spring rate) as well as the ratio of sprung to unsprung mass.

 

[zkling]

I'm being serious: what's with this antagonistic and sort of "younger" approach to disagreement? It doesn't sit well with me. I don't know which of you two is correct because I know jack about science or math, but as an observer I can detect which approaches to debate are off-putting and which are productive.

It has nothing to do with age. Heck I bet I am younger than he is. It has EVERYTHING to do with someone that provides false information and tries to back it up with their educational background. Combined with a very cocky tone, addition of mathematical definitions, I just had enough. I am a very confrontational person at times, especially when someone tries to call me out on something then back up their argument with false information.


This is where is went down hill. Untill this I thought this thread was very informational.

do you even know what impulse is? It is the integral of a force with respect to time.

Not trying to sound pompous, but I have a mechanical engineering degree. And a strong interest in tools.

This topic drives me insane.

of "younger" approach to disagreement?

EDIT, Bull, so are you calling me immature? All I am asking is for the guy to put up or shut up.

 

[MikeF2316]

Right but what usually is considered for overall ride confortability is natural frequency (which is dependent on the spring rate) as well as the ratio of sprung to unsprung mass.

Right. My example wasn't really very well thought out. Everything else being equal, the harder spring will transmit a higher force for a shorter time. A better example would be the comparison between a car before and after sport springs are installed, there would be way fewer variables.

 

[zkling]

Right. My example wasn't really very well thought out. Everything else being equal, the harder spring will transmit a higher force for a shorter time. A better example would be the comparison between a car before and after sport springs are installed, there would be way fewer variables.

Cool. I understood it, just trying to elaborate. Are you a vehicle dynamics guy? Sounds like it.

 

[b7labelle]

What is the point in offering explanations? We are well past the point of anything constructive.

 

[TwoInch]

I'm being serious: what's with this antagonistic and sort of "younger" approach to disagreement? It doesn't sit well with me. I don't know which of you two is correct because I know jack about science or math, but as an observer I can detect which approaches to debate are off-putting and which are productive.

whats off putting to me is when someone claims to be an egg-spurt on a subject, is completely wrong, but cant admit so. then continues to act as though they have an understanding of something because of "credentials".

when you are wrong, you are wrong. i find that when people need to spout credentials on a subject, they are generally over confident, and portraying themselves as more than they actually are.

some of the approach here may have been a little over the top, but not out of bounds in my opinion(worth little).

 

[Bull]

EDIT, Bull, so are you calling me immature? All I am asking is for the guy to put up or shut up.

I don't do the name-calling thing because I think it's ridiculous.

I said younger approach because the repeated use of badgering and "I'm right, you're wrong, your education is crappy" responses reminds me of a younger approach. I don't know how else to say it.

And he's right, we are way past the point of constructive, which is too bad. So, I gotta axe my own thread. What a bummer.