Re: brush hogging with a narrow front?

Posted by Burnie on July 27, 2005 at 05:49:11 from (144.138.73.168):

In Reply to: brush hogging with a narrow front? posted by chris sweetland on July 26, 2005 at 09:44:08:

When a tractor rolls over, it rotates around either the left or right tipping axis. On wide front tractors, the axis lines run from the outside of each rear wheel (where they touch the ground), and meet at the front axle pivot pin. On narrow fronts, the lines run from the same points at the rear,to the point where the outside of the front wheel/s touch the ground. In this case the lines will meet at a point just forward of the tractor.
When viewed from above, the two lines form two sides of a triangle. This is known as the tractor's "stability triangle".
When a tractor's centre of gravity moves outside the stability triangle, the tractor rolls. The larger the triangle, the more stable the tractor.
So it doesn't matter whether you have a wide or narrow front, the way to improve stability is to increase the rear wheel spacing.
The stability triangle is only part of the story. We all know about things like high centre of gravity, high speeds and sharp turns.
As pointed out in the other posts, rollovers can happen with any tractor. The issues with narrow fronts is that they may have a high centre of gravity and are capable of very sharp turns. Have a look at the "stuck and troubled photo gallery. One picture labled 'Rollover Farmall B' shows what can happen with a sharp turn on a slope that wasn't particularly steep. This could have happened with any type of tractor and I don't mean to single out narrow fronts (or their operators). If you know the capabilities and and limitations of your tractor, operate correctly with common sense,you should be able to avoid the dreaded rollover.
A ROPS is your last line of defence and I wouldn't operate in rough or steep country without one.

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