Hill Climbing Primer

[SPYDERLK]

Yep.

I give Larry credit for trying real hard to dummy it down so I can understand it. But he continues to add stipulations to my simple statement. It's obvious to me that it does not matter to Larry what my statement is. He will continue to dispute it. Even though in one comment he admitted that the front of the tractor would lighten in my stated situation.

CalG gives my statement no credibility and matter of factly states so.

I have tried to always stick to the facts of my statement. I've also tried to get a simple answer to my questions. I now believe that is not possible from Larry or CalG. It's just not in their nature to put this situation into daily use terms. Instead they try to complicate it with lengt hy dialect about varying situations and conditions.

So, I am left with little to add.

I answered every question. You were silent. I gave you a simple answer illustrating by math that the broad claim you and Egon make is incorrect. In response I hear that there is something else missing that makes your claim correct. There is not. You are throwing chaff. You have taken something that is evident from using wrenches to get a stuck nut off a bolt and totally missed its significance.

The use of mysticism in science, and by others against science is the most effective weapon against actual knowledge. - - Find an explanation that survives a minimum of surface scrutiny and makes a good sound byte and then quit thinking. "Everybody knows". People latch on and resist anything complete enuf to be correct.
larry

 

[SPYDERLK]

Or maybe a rear flip is possible when hooked below the drawbar.

Maybe inspect your parameters for obvious overlooked items you can get your head around.

I know of things that could cause it. I have mentioned several. No evidence that the ideas entered your head ay all..
larry

 

[CalG]

Simple terms:

When the front end of the tractor lifts, the rear drawbar of the tractor will lower. This is a function of tractor geometry. The higher the front end raises, the lower the rear drawbar is driven. As the drawbar lowers, the angle of pull and the leverage the load has to tip a tractor rearward is also lowered. By design, a load will always lose its ability to tip a tractor rearward before the tractors CG reaches the rear stability baseline. As the load loses its ability to continue to tip he tractor rearward, the front end falls back to the ground. [end]

From National Ag Safety Database - Tractor Overturn Hazards ( previously posted)

But without explanation of why.

Understandable?

 

[CalG]

Information most pertinanent to the OP topic of "a hill climbing primer".

From the same document;
National Ag Safety Database - Tractor Overturn Hazards

[quote} For example, when a tractor is in a deep hole, or is traveling up a steep incline, the distance between the tractors CG and rear stability baseline is narrowed. If excessive rear axle torque is applied, the tractor will reach the point of no return more quickly. Figure 4 illustrates this situation. [end]

Of particular note , and missing from the document description, is when ascending an incline going forward, the Center of Mass of the tractor both moves rearward, and UP relative to the drive point of the tires and the rotation axis at the axle compared to a similar configuration of travel and load on flat ground. This change in CoM location exacerbates the effects of wheel torque and high hitched load, if present.

High CoG is Good if you desire maximum weight transfer on acceleration, such as a fuel dragster, but not so good is just pulling a heavy load. High CoG does NOTHING to improve traction in a steady state situation. That is, Not accelerating. But it does make things "tippy".

 

[SPYDERLK]

Simple terms:

When the front end of the tractor lifts, the rear drawbar of the tractor will lower. This is a function of tractor geometry. The higher the front end raises, the lower the rear drawbar is driven. As the drawbar lowers, the angle of pull and the leverage the load has to tip a tractor rearward is also lowered. By design, a load will always lose its ability to tip a tractor rearward before the tractors CG reaches the rear stability baseline. As the load loses its ability to continue to tip he tractor rearward, the front end falls back to the ground. [end]

From National Ag Safety Database - Tractor Overturn Hazards ( previously posted)

But without explanation of why.

Understandable?

The words are good, but not if you look at Fig 5.
I said rufly the same thing back in post#83.

 

[CalG]

Don't look at figure #5, ! [;-)

yes, (previously posted) includes your contributions.

Are we on track yet? Some need to know why, some ask for simplicity.

How to get those logs up safely!

 

[Egon]

I know of things that could cause it. I have mentioned several. No evidence that the ideas entered your head ay all..
larry

Don't worry, not much enters my head these days. Seems it's already been breached and the cache is full.

Like; tractors can flip over backwards when hooked below the axle. Knew that one before I was ten and it's still entered in my head. Also knew that the three point hitch wasn't common in my area so hitching was below the axle. Also knew enough to keep a foot on the clutch when pulling a heavy load. Even popped it in so the falling front of the tractor would give a little advantage when I popped it out. Musta been thinking of spaners when that was done?

Are you gona come up with facts soon or just keep on trying to sell yourself to the challenged. Got no money to buy any of that stuff anyway.

 

[CalG]

Don't worry, not much enters my head these days. Seems it's already been breached and the cache is full.

Like; tractors can flip over backwards when hooked below the axle. Knew that one before I was ten and it's still entered in my head. Also knew that the three point hitch wasn't common in my area so hitching was below the axle. Also knew enough to keep a foot on the clutch when pulling a heavy load. Even popped it in so the falling front of the tractor would give a little advantage when I popped it out. Musta been thinking of spaners when that was done?


Are you gona come up with facts soon or just keep on trying to sell yourself to the challenged. Got no money to buy any of that stuff anyway.

Egon

Your comments in this post are "trolling". That is, stirring up emotions and so trouble. Such approaches seldom result in anything worthwhile.

I ask you to please not do that. And I ask that you point out such comments by me in turn.

 

[CalG]

Simple terms:
The words are good, but not if you look at Fig 5.
I said rufly the same thing back in post#83.

Did you note the mis information that is presented in the plan view of the "stability baseline" associated with conventional and tricycle wheel arrangements?
The front axles on all of my tractors pivot on a single pin ;-)

 

[Egon]

Did you note the mis information that is presented in the plan vie of the "stability baseline" associated with conventional and tricycle whell arrangements?
The front axles on all of my tractors pivot on a single pin ;-)

Had my head around that one too!

Picked up a fishing licence last week but just havin a canoe makes trolling difficult.