Abstract: A molded mat comprises male and female connectors that are configured to exhibit improved connectivity when engaged with connectors of an adjacent mat. A method of molding the mat includes providing specially placed vents in the mold to form the increased density portions of the mat. The mat can also include additional recesses formed in the underside of the mat so that the mat can be cut to a smaller size without losing its ability to connect with other mats.

Abstract: A control system for use with a master engine and one or more slave engines. The master engine produces a master torque and the slave engines produce slave torques. The master engine and the slave engines have computers that control fueling to the engines. The control system of the invention includes an interface between the control computer for the master engine and the control computers for the slave engines. The master control computer controls the slave control computers through the interface, such that the slave torques are a function of the master torque.

Abstract: A control system for use with a master engine and one or more slave engines. The master engine produces a master torque and the slave engines produce slave torques. The master engine and the slave engines have computers that control fueling to the engines. The control system of the invention includes an interface between the control computer for the master engine and the control computers for the slave engines. The master control computer controls the slave control computers through the interface, such that the slave torques are a function of the master torque.