sentences:  The engines were hot-fire tested at White Sands Test Facility in 2007 and 2008 to verify that they could perform the pulsing duty cycle required by Ares I-X.At the top of the Ares I-X flight test vehicle was a combined Orion crew module and launch abort system simulator, resembling the structural and aerodynamic characteristics of Ares I.The full-scale crew module (CM) is approximately 16 feet (5 m) in diameter and 7 feet (2.1 m) tall, while the launch abort system (LAS) is 46 feet (14 m) long.