Abstract: A method and system for supporting a test article or structure in a gravity environment for the purpose of testing the article in a simulated weightless condition includes at least one support assembly attached to the article for suspending the article from an overhead support. The support assembly includes three cables each having an end attached to the article. The cables are capable of being actuated to cooperatively maintain a constant resultant vertical force on the test article which is equal to the weight of the article. The system includes a controller which is capable of adjusting the force in each cable to continuously maintain the constant resultant force on the article as it moves from position to position. The controller can calculate the new position of the test article as it moves from position to position.