A model of an A-10 Thunderbolt II, more commonly known as “The Warthog” due to its unique shape, recently underwent a pressure-sensitive paint (PSP) test in Arnold Engineering Development Complex’s 16-foot transonic wind tunnel. PSP was used to obtain surface pressure data on the model. The photo above shows a rear view of the A-10 model during testing in 16T. The A-10 is the only U.S. Air Force aircraft designed to be specifically used for close air support. The aircraft is notorious for its maneuverability at low speeds and low altitudes and its accurate weapons delivery.