The Lockheed Martin X-55 Advanced Composite Cargo Aircraft (ACCA) is an experimental twin jet engined transport aircraft which will demonstrate new cargo-carrier capabilities using advanced composites. A project of the United States Air Force's Air Force Research Laboratory it was built by the international aerospace company Lockheed Martin at its Advanced Development Programs facility in Palmdale California.
Made by Lockheed MartinSkunk Works.
It is the successor of the Fairchild Dornier 328JET .