In charge are the Defense Advanced Research Projects Agency (DARPA) and the Boeing subsidiary Aurora Flight Sciences.
[3] Aurora Flight Sciences embarked on the development of an experimental X-plane, as part of the DARPA's CRANE programme, in November 2020.
DARPA allocated funds for the detailed engineering design of a full-scale X-plane in December 2022.
Aurora Flight Sciences was commissioned to construct a full-scale X-plane in January 2024.
[4] The acronym CRANE refers to a DARPA programme called Control of Revolutionary Aircraft with Novel Effectors.