Scale model studies of the Shuttle Orbiter Arrestment System have been completed. The system was tested with a 1/27.5 scale model at the NASA Langley Research Center and a 1/8 scale model at All American Engineering Company. The purpose of these studies was to determine the proper net arrestment system configuration to bring the Orbiter to a safe stop in the event of a runway overrun with minimal damage. Tests were conducted for centerline engagements and off-center engagements at simulated speeds up to 95 knots full scale. The results of these studies defined the net-orbiter interaction, corrections to prevent underwing engagements, corrections necessary to prevent net entanglement in the main gear, the dynamics of off-centerline engagements, and the maximum number of vertical straps that might become entangled with the nose gear.