Worthless tip over calculations...are interesting!

[4570Man]

If you put the tractor on a platform and lifted it up until it tipped the angle would be quite steep. If you introduce movement and a hole on the low side the angle is much less.

 

[Hermio]

That is true, as long as the platform is made of a material which would not let the tractor slide. Generally, on soil, a tractor will slide sideways before it reaches the static tipping angle. But even then, if the soil builds up and forms a ridge downhill of the tractor, it may cause it to stop sliding and tip over. I have come close to this with a Kubota B7100, which has a 48" width. My Mahindra, with OEM tire setting, has a 75" width. It can be set to 78.6".

 

[MossRoad]

13 year old thread CPR! :laughing:

45 degree slope mower!
TSM Class

 

[Hermio]

Can't open link.

 

[LD1]

Yea, really old thread....

I did similar calculations about a year ago for my tractor. I checked with different setups combinations of tractor, FEL, and bushhog.

The static point is higher than alot of people think, but there is something important that was missed 13 years ago. Not only do you need to know the COG height, but you need to ALSO know its fore/aft location. The closer to the rear, the higher the tipping angle. The closer to the front, the less the tipping angle since the front is on a pivot.

To find COG fore and aft, its simply measuring the F/R weights and using that ratio against the wheel base.

To find the exact height requires a way to lift one end of the tractor a specified distance and having the ability to weigh the tractor with one end elevated. (usually 24", but the higher, the greater accuracy). Then there is a formula that factors the weight transfer. Obviously the higher COG will transfer more weight when one end is raised.

 

[MossRoad]

Yea, really old thread....

I did similar calculations about a year ago for my tractor. I checked with different setups combinations of tractor, FEL, and bushhog.

The static point is higher than alot of people think, but there is something important that was missed 13 years ago. Not only do you need to know the COG height, but you need to ALSO know its fore/aft location. The closer to the rear, the higher the tipping angle. The closer to the front, the less the tipping angle since the front is on a pivot.

To find COG fore and aft, its simply measuring the F/R weights and using that ratio against the wheel base.

To find the exact height requires a way to lift one end of the tractor a specified distance and having the ability to weigh the tractor with one end elevated. (usually 24", but the higher, the greater accuracy). Then there is a formula that factors the weight transfer. Obviously the higher COG will transfer more weight when one end is raised.

My tractor's articulated, so the COG changes drastically with each turn of the steering wheel. For example, on flat land, I can load the bucket and be fine. However, if I turn the steering wheel left or right, the tractor can dip down and raise the rears off the ground. Turn the wheel back to center and the rears go back down. Very important to remember when carrying loads on hills.