When turning suddenly while pulling doubles, which trailer is most likely to turn over?

When turning suddenly while pulling doubles, the dynamics of the trailers come into play, particularly how weight distribution and momentum affect stability. The rear trailer is more susceptible to tipping over during sudden maneuvers primarily due to its position in relation to the pivot point (which is the connection between the tractor and the front trailer).

As the vehicle makes a sharp turn, the front trailer leads the way, creating a path for the rear trailer to follow. Since the rear trailer is further from the pivot point, it experiences greater centrifugal force, making it more likely to tip over. This is particularly true if the rear trailer is loaded, as the added weight can shift and contribute to instability during a turn.

Meanwhile, the front trailer, being closer to the tractor, maintains a relatively stable position and is less affected by the outward forces experienced during sharp turns. The tractor itself has the lowest risk of tipping over, as it is generally designed with a low center of gravity.

Thus, the assessment that the rear trailer is twice as likely to turn over as the tractor aligns with these principles of vehicle dynamics, particularly in a situation involving doubles where the distance from the pivot increases the chance of tipping.