WranglerX
Super Member
As if the distinction hasn稚 been made several times here already.
Yeah, but some were rather vague in the wording/description..
Dale
As if the distinction hasn稚 been made several times here already.
The forces would be extreme. But you don't need vector analysis to imagine the scenario where the rear axle can't move forward (due to the drawbar chained to an immovable object) and a mechanical driveline continues to send torque to the rear axle that has perfect traction. If nothing breaks then rotating the tractor up and over backward is inevitable. I suppose if the drawbar extended out beyond the tires and didn't bend then the rotation would end when the weight of the tractor rested on the tip of the drawbar so the tires lost traction.
Vector analysis may help you here, actually.
100% true.
I was in HST PLUS/LOW/LOW with quite a bit of throttle, moving very, very slowly, over known sand where load would not hang up on something fixed. I had to lift front of the stump a tad to keep from plowing too much sand, stopping progress.
I like your analysis. It seems the most accurate of anything in this thread.Vector analysis may help you here, actually.
Given perfect traction, and the drawbar attached to the immoveable object, as the tractor attempts to climb, the drawbar would dip down, which would require an increase in the distance between the drawbar and the immoveable object. Assuming a perfect non-deforming (no stretch) attachment - a chain made of adamantium or unobtanium or somesuch - this distance can't increase, so the tractor can't climb.
Something, somewhere, has to break - either traction (tires spin), tires (tear?), chain (breaks or stretches), object (starts to move), axle, transmission, engine (breaks or stalls).
Vector analysis may help you here, actually.
Given perfect traction, and the drawbar attached to the immoveable object, as the tractor attempts to climb, the drawbar would dip down, which would require an increase in the distance between the drawbar and the immoveable object. Assuming a perfect non-deforming (no stretch) attachment - a chain made of adamantium or unobtanium or somesuch - this distance can't increase, so the tractor can't climb.
Something, somewhere, has to break - either traction (tires spin), tires (tear?), chain (breaks or stretches), object (starts to move), axle, transmission, engine (breaks or stalls).
First, the 3 PH is different from the drawbar. A true drawbar is attached to the belly of the tractor and only swings from side to side (on some models but not all). They cant be raised up or down and can never cause the tractor to flip over. With lots of traction like with dual rear tires, one may get enough traction to raise the front wheels a bit but as the front comes up, the drawbar gets lower and this tends to lessen traction to the point that the front wheels will go back down (been there done that a lot with my Dads 9000 Ford tractor with dual rear wheels).The very best answer, call a tow truck, that's what they are designed for. No risk to you or your tractor.
There is nothing to prevent the 3pt and drawbar from rising up and putting the forces above the rear axle under the right circumstances. If you try to pull from the front you will lose a lot of tractive effort from the rear wheels.
Joe