A B C D E F G H I J K L M N O P R S T U V WXYZ


understeer:
a handling condition in which the slip angle of the front tires is greater than the slip angle of the rears. An under steering car is sometimes said to push, because it resists turning and tends to go straight.

unitized construction: a type of body construction that doesn't require a separate frame to provide structural strength or support for the car's mechanical components. A unitized body can employ monocoque construction, or it can utilize strong structural elements as an integral part of its construction.

universal joint: a joint that transmits rotary motion between two shafts that aren't in a straight line. Depending on its design, a universal joint can accommodate a large angular variation between its inputs and outputs. The simplest kind of universal joint, called a "Hooke joint," causes the output shaft to speed up and slow down twice for every revolution of the input shaft. This speed fluctuation increases with the angular difference between the shafts.