Essay On Space Launch System

2348 Words5 Pages

CHAPTER 1 SPACE LAUNCH SYSTEM : GENERAL STAGES BOOSTERS PROPOSED MISSIONS WHAT IS THE SPACE LAUNCH SYSTEM? The Space Launch System (SLS) is NASA’s new heavy launch vehicle. It is to replace the retired Space Shuttle. Its initial Block I version, without an upper stage, is to lift a payload of 70 metric tons to orbit. The final Block II version is to have a payload lift capability of at least 130 metric tons to low earth orbit, 12 metric tons above that of Saturn V, which would make the SLS the most capable heavy lift vehicle ever built. WHY SLS? SLS is to be capable of lifting astronauts and hardware to near-Earth destinations such as asteroids, the Moon, Mars, and Earth's Lagrangian points. SLS can also support trips to the International Space Station. The SLS program is in combination with NASA's Orion Crew and Service Module, which would have astronauts returning to earth in a capsule-shaped, four-person module. SLS will use the ground operations and launch facilities at the Kennedy Space Center, Florida. The first flight-test of the Block I variant of the vehicle, (Exploration Mission 1) is scheduled to be in 2017. *Low Earth orbit (LEO): Orbit around Earth with an altitude between 160 kilometers and 2,000 kilometers. *Lagrange points: There are five other locations around a planet’s orbit where the gravitational forces and the orbital motion of the spacecraft, Sun and planet interact to create a stable location from which to make observations. STAGES OF THE SLS 1. CORE STAGE The core stage of the SLS consists of a modified Space Shuttle External Tank with the aft section modified to accept the rocket's Main Propulsion System (MPS) and the top modified to hold an interstage structure. Since the M... ... middle of paper ... ...ines, will be installed on the stand for propellant fill and drain testing and two hot-fire tests. Engine Testing A new 7755-pound thrust frame adapter for the A-1 Test Stand is being fabricated to enable testing of the RS-25 engines. Each rocket engine type requires a thrust frame adapter unique to its specifications. On the test stand, the adapter is attached to the thrust measurement system. The rocket engine is then attached to the adapter, which must hold the engine in place and absorb the thrust produced during a test, while allowing accurate measurement of the engine performance. The design has to account for a number of considerations, such as specific stresses on the equipment as an engine is fired and then gimbaled during a test, what type and strength of bolts are needed to fully secure the equipment, and what materials can be used to build the adapter.

Open Document