sentences:  The Ares I-X flight profile resembled the uncrewed Saturn I flights of the 1960s, which tested the Saturn propulsion concept.By flying the vehicle through first-stage separation, the test flight also verified the performance and dynamics of the Ares I solid rocket booster in a “single stick” arrangement, which is different from the solid rocket booster's then-current “double-booster” configuration alongside the external tank on the space shuttle.The Ares I–X vehicle consisted of a functional four-segment solid rocket booster (SRB) stage, a fifth segment mass simulator, an upper-stage simulator (USS), which was similar in shape and heavier than the actual upper stage, as well as a simulated Orion crew module (CM) and launch abort system (LAS).