[AT] ROPS

[Dennis Johnson]

I agree with Dean that the only significant this is the height of the center of gravity, and the width of the rear heels. The front only comes into play only on a few extreeme circumstances such as dropping the rear wheel in a hole or something like that.
I have personally done rollover testing of big trucks on tilt tables, and have also designed rollover bars (Headache racks) for many truck. I have seen some of these units tested when the trucks rolled over, and have seen some fail, but still took enough energy to prevent killing or severly huring the driver.
The problem with most rollovers is it is rarely as simple at the tilt table testing. Many times there are 2 or 3 factors that add up to cause accidents.