Viscous unstructured three-dimensional grids by the advancing-layers method

A pair of jack assemblies, each having a longitudinally adjustable body and support foot diagonally coupled to the bottom of the body, are rotationally coupled to a pair of plates mounted to a vehicle. In an operational position, the jack assemblies extend downward to the ground in an outward direction transverse to the longitudinal axis of the vehicle. In a storage position, the jack assemblies are rotated upward to a horizontal position so they extend beyond the sides of the vehicle and then adjusted to decrease their length so the foot engages a portion of the vehicle and prevents downward rotational movement of the jack assembly. The coupling between each jack assembly and the associated mounting plate provides for limiting rotation of the jack assembly between the operational and storage positions.