Lockheed Martin X-55

X-55 ACCA
Role Technology demonstrator
Manufacturer Lockheed Martin Skunk Works
First flight 2 June 2009
Primary user United States Air Force
Number built 1
Developed from Fairchild Dornier 328JET

The Lockheed Martin X-55 Advanced Composite Cargo Aircraft (ACCA) is an experimental twinjet transport aircraft. It is intended to demonstrate new air cargo-carrier capabilities using advanced composite materials. 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 (Skunk Works) facility in Palmdale, California.