Question: In which state is the Aero-propulsion Systems Test Facility located where aircraft propulsion systems are tested in true mission environments without leaving the ground?
Context: The RBCC, or Rocket-Based Combined Cycle propulsion system, is one of the two types of propulsion systems that may be tested in the Boeing X-43 experimental aircraft.  The RBCC, or strutjet as it is sometimes called, is a combination propulsion system that consists of a ramjet, scramjet, and ducted rocket, where all three systems use a shared flow path. White Sands Test Facility (WSTF) is a U.S. government rocket engine test facility and a resource for testing and evaluating potentially hazardous materials, space flight components, and rocket propulsion systems.  NASA established WSTF on the White Sands Missile Range in 1963.  WSTF services are available to NASA, the United States Department of Defense, other federal agencies, universities and commercial industry.  WSTF is managed by the Lyndon B. Johnson Space Center.  WSTF is located in the western foothills of the Organ Mountains, eleven miles east of Las Cruces, New Mexico. Advanced Space Propulsion Investigation Committee (ASPIC) was a research group of specialists, including Y.Minami, and T.Musha, which was organized under the Japan Society for Aeronautical and Space Sciences in 1994.  The purpose of which was to study all kinds of non-chemical space propulsion systems instead of the conventional rocket for the use of space missions to the nearby Earth, the Moon, and the outer solar system, including plasma propulsion, laser propulsion, nuclear propulsion, solar sail and field propulsion systems which utilize a strain on space, zero-point energy in a vacuum, electro-gravitic effect, non-Newtonian gravitic effect predicted from the Einstein Theory of Gravity, and the terrestrial magnetism.  The research report was published by the Japan Society for Aeronautical and Space Sciences in March 1996. Dr. A.E. Muthunayagam was born on 11 January 1939.  He is a leading Space Scientist in Indian Space Research Organisation and the chief architect of Rocket Propulsion in India.  He was responsible for the creation of Liquid Propulsion Systems Centre.  For his significant contributions to the development of Propulsion Technology in India, he is known as the Father of Propulsion Technology in Indias Space program.  He chose to return to India from NASA, United States for the development of Propulsion Technology in ISRO.  He established the Test Stands and Assembly and Integration facilities in Liquid Propulsion Systems Centre, Mahendragiri for testing Liquid Stages of PSLV and GSLV vehicles.  He is the Founder Director of LPSC and held the position for 9 years from 30/11/1985 to 14/04/1994.  He held the Secretary position in the Department of Ocean Development.  He worked as an Executive Vice-President in Kerala State Council for Science Technology and Environment.  He worked as Chairman of the Board of Governors of the Indian Institute of Technology, Chennai from 2005 to 2008.  He was appointed under Section 11 of the IIT Act of 1961, which lays down the composition of the Board of Governors for each of the seven IITs across the country. L-3 Combat Propulsion Systems, a division of L-3, was formerly a division of General Dynamics Land Systems until L-3 acquired it in 2005.  It is located in Muskegon, Michigan.  L-3 - Combat Propulsion Systems employs over 500 people and was the 4th largest employer in Muskegon County as of 2006. Gary L. Bennett (born January 17, 1940) is an American scientist and engineer, specializing in aerospace and energy.  He has worked for NASA and the US Department of Energy (DOE) on advanced space power systems and advanced space propulsion systems.  His professional career has included work on the Voyager, Galileo, and Ulysses space missions, and is currently working as a consultant in aerospace power and propulsion systems.  He is also a science fiction author ("The Star Sailors"). The ISRO Propulsion Complex (IPRC), located at Mahendragiri of Tamil Nadu, is an Indian Space Research Organisation centre involved in testing, assembling, and integrating propulsion systems and stages that are developed at ISRO's Liquid Propulsion Systems Centres. Formerly, IPRC was known as LPSC, Mahendragiri, functioning under LPSC, Valiamala in Thiruvananthapuram of Kerala.  It was elevated as IPRC with effect from February 1, 2014. Arnold Engineering Development Complex (AEDC), Arnold Engineering Development Center before July 2012, located at Arnold Air Force Base, Tennessee is a ground-based flight test facility operated by the Air Force Test Center. The Aero-propulsion Systems Test Facility, located at Arnold Engineering Development Complex is a unique national facility designed to test aircraft propulsion systems in true mission environments without leaving the ground.  The test unit is owned by the United States Air Force and operated by Aerospace Testing Alliance. Electromagnetic formation flight (EMFF) investigates the concept of using electromagnets coupled with reaction wheels in place of more traditional propulsion systems to control the positions and attitudes of a number of spacecraft in close proximity.  Unlike traditional propulsion systems, which use exhaustible propellants that often limit lifetime, the EMFF system uses solar power to energize a magnetic field.  The Massachusetts Institute of Technology Space Systems Laboratory is exploring this concept by developing dynamics and control models as well as an experimental testbed for their validation.
Answer: Tennessee