The most classified aircraft to date. The UI-4054 Aurora was built in 1996 by the Lockheed Martin "Skunk Works" Company in complete secrecy. It is the cornerstone of the project code named "Have Grey". The project cosists of five aircraft: The Su-43, the R-103, the XFA-36, the R-325, and the UI-4054. Like the devolopment of the F-117 stealth bomber in the early 80s this plane is flown and operated under the highest level of secrecy. The Aurora uses a state of the art engine and an unknown jet fuel. The entire plane is a flying wing (a design NASA has been tinkering with).