TA torque reaction-not!

[dunerocket]

I'm not kidding. In my work, ignoring items like that cause multi-million dollar losses. Remember that o-ring that failed and destroyed the space shuttle? There plenty of people on that decision that were not intimately involved with thermal cycle testing of that o-ring.

There are close to 2000 members, and I have no idea how many guests. I'd guess many of those take statements from here as fact. Some probably do not understand the physics and fomulea that describe what is happening. Some are students that are, may or will be taking physics and engineering courses. They should question statements until they are throughly convinced the information is correct.

I'm merely pointing out that everyone here that said it does not happen is technically incorrect.

I do agree though that for practical use it could be ignored.

Here is a link to some simple free body diagrams

Drawing Free-Body Diagrams

[masterfabr]

Originally Posted by dunerocket

I'm not kidding. In my work, ignoring items like that cause multi-million dollar losses. Remember that o-ring that failed and destroyed the space shuttle? There plenty of people on that decision that were not intimately involved with thermal cycle testing of that o-ring.

There are close to 2000 members, and I have no idea how many guests. I'd guess many of those take statements from here as fact. Some probably do not understand the physics and fomulea that describe what is happening. Some are students that are, may or will be taking physics and engineering courses. They should question statements until they are throughly convinced the information is correct.

I'm merely pointing out that everyone here that said it does not happen is technically incorrect.

I do agree though that for practical use it could be ignored.

Here is a link to some simple free body diagrams

Drawing Free-Body Diagrams

I'm not argueing your point and a good point it is.I'm also saying that when something such as this is discussed in this exact context there is no appreciable torque reaction that should be considered .I think the practical is what is being discussed here and not the infinitely analyzed to the last decimal point conclusion that for all intents and purposes is not relevant. For this particular discussion I think you agree that any torque reaction that you are talking about is totally irrelevant.

[dunerocket]

I'm merely using this thread as a tool. There are many times that people state "can't", "won't", "impossible", "that will surely break".... This is a perfect example of people applying their personal and/or professional experience to make such claims and are in fact wrong.

[masterfabr]

In practical terms they are right.THe real world also dictates that some things are so small (in our world not rocket world)to not be relevant and therefore are useless to consider.I do understand that technically you are right. In the case that we are talking about what relevance would the bearing drag and seal drag and lube and dust on the seals and how tight the bearings were torqued and and and whatever else have?

[masterfabr]

THe question that should be in this discussion is: Is there any torque reaction that could lift the rear of a car through a trailing arm or is the car lifting from the wheel/tire trying to "drive under the car" ,pivoting around the front pivot and causing the lifting action? Probably still not stated correctly for you but I'm pretty sure you know what I mean. We are on the same page anyway. I'll concede this technically you are correct but in the practical application I am.

[LEE1969GB]

I do not pretend to know everything about torque reaction but from my own experiance I once built a buggy with a quad type swinging arm and put the front drive sprocket dead center on the swinging arm pivot thinking that would be best (no chain movement through the swinging arm stroke) when I drove the buggy it just lift the rear when I accelerated and would not allow the swinging arm to move even on big bumps. Rolling in neutral it worked fine.
This is why they have adjustable swing arm pivot point on road race bikes so you can change how the bike reacts when you put on the power or shut off.
Its sort of like the bike, buggy or what ever trying to rotate itself around the pivot point instead of driving forward.
I hope that makes some sence, I know what I am trying to say !!!