The YF-12 was an experimental fighter-interceptor version of the Lockheed A-12 reconnaissance aircraft. YF-12s were used in a joint Air Force-NASA research program to study the thermal, structural, and aerodynamic effects of sustained, high-altitude flights. The YF-12 was fabricated primarily from titanium alloy and was painted flat black, which enabled it to withstand high stresses in altitude and temperatures over 500The postage stamp die-cast metal, historical airplanes include aircraft from WWI to present. They are fully decorated with authentic details and come with a display stand. Wingspans are from 4 1/2" to 8".