A test article is a version of space craft or related vehicle or equipment, built as a platform to perform testing. Test articles are built to the same specifications to replicate conditions and behaviors of flight ready versions. Test article version are also built without the certification and quality control steps taken with the versions intended for flight. Test articles are more complete than a boilerplate.
Test articles can sometimes be upgraded to flight ready status. Of the 136 Space Shuttle external fuel tanks produced, one was retained as a test article. The contractor producing the tanks commented that that tank could be refurbished for flight use if necessary. The static test article for the Dream Chaser lifting-body spaceplane "will become the atmospheric flight test vehicle in 2012 for drop tests."
Test articles are often displayed in museums because of their accuracy. Museums may refurbish test articles to match more modern configurations. This was completed on the Hubble Space Telescope Structural Dynamic Test Vehicle on display at the National Air and Space Museum where this 1976 version of the vehicle was removed from display and upgraded in 1996 by the Smithsonian, Lockheed, and NASA to incorporate changes made on the on-mission version of the Hubble Space Telescope over several servicing missions.
Famous quotes containing the words test and/or article:
“We do not quite say that the new is more valuable because it fits in; but its fitting in is a test of its value—a test, it is true, which can only be slowly and cautiously applied, for we are none of us infallible judges of conformity.”
—T.S. (Thomas Stearns)
“It is long ere we discover how rich we are. Our history, we are sure, is quite tame: we have nothing to write, nothing to infer. But our wiser years still run back to the despised recollections of childhood, and always we are fishing up some wonderful article out of that pond; until, by and by, we begin to suspect that the biography of the one foolish person we know is, in reality, nothing less than the miniature paraphrase of the hundred volumes of the Universal History.”
—Ralph Waldo Emerson (1803–1882)