Michael Cooney
Senior Editor

NASA sets heavy-lift rocket design for future space shots

Opinion
Sep 14, 20113 mins

NASA booster uses technology developed for Space Shuttle, Constellation

artist concept of sls
NASA has chosen to reuse a lot of previously developed rocket technology to build a new heavy-lift booster for future space flights.

Known as the Space Launch System, or SLS, it will first carry the Orion Multi-Purpose Crew Vehicle to Earth’s orbit and possibly beyond.  Interestingly NASA said the SLS will operate as a back-up for commercial and international partner transportation services to the International Space Station.

NASA has a variety of commercial developments in the works from Boeing, Space Exploration Technologies (Space X), Sierra Nevada and Blue Origin.   

Cool background: 10 NASA space technologies that may never see the cosmos

From NASA: “The SLS rocket will incorporate technological investments from the Space Shuttle program and the Constellation program in order to take advantage of proven hardware and cutting-edge tooling and manufacturing technology that will significantly reduce development and operations costs. It will use a liquid hydrogen and liquid oxygen propulsion system, which will include the RS-25D/E from the Space Shuttle program for the core stage and the J-2X engine for the upper stage. SLS will also use solid rocket boosters for the initial development flights, while follow-on boosters will be competed based on performance requirements and affordability considerations. The SLS will have an initial lift capacity of 70 metric tons (mT) and will be evolvable to 130 mT. The first developmental flight, or mission, is targeted for the end of 2017. “

NASA said it is utilizing already developed technologies to reduce costs as budget constraints could reduce future developments. The SLS architecture also lets NASA  use existing capabilities and lower development costs by using liquid hydrogen and liquid oxygen for both the core and upper stages. “Additionally, this architecture provides a modular launch vehicle that can be configured for specific mission needs using a variation of common elements. NASA may not need to lift 130 mT for each mission and the flexibility of this modular architecture allows the agency to use different core stage, upper stage, and first-stage booster combinations to achieve the most efficient launch vehicle for the desired mission,” NASA said.

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