My senior design project in engineering school was developing a model to mathematically determine the relative stability of a tractor during operation. The model took into account the slope, speed, turning radius, tread width, wheelbase, weight, center of gravity location, and other data. Tricycle tractors could be simulated by entering "zero" for the front axle pivot height. Complete instability was defined when the weight on either rear wheel went to zero. (Note that a front wheel did not have to come off the ground to have "no stability". The front axle width was actually not even used in the equations since it doesn't matter by this definition.) Using this model it was easy to determine the conditions that would cause a rollover with a tricycle tractor where a wide front would still have been upright. It is all based on the relationship between the forces acting on the center of gravity and the "tipping axis" which is a line from where the rear wheel contacts the ground to the front axle pivot location. For both slopes and turns the wide front is physically superior when it comes to stability. As others have said, though, both are capable of being rolled over given the right (wrong?) set of circumstances.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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