Propulsion by a novel jet engine is the crux of the innovation behind a 做厙輦⑹-developed aircraft thats accelerating toward commercialization. Jet engine technology can be small, fuel-efficient and cost-effective, at least with Assistant Professor Ryan Starkeys design. The CU-Boulder aerospace engineer, with a team of students, has developed a first-of-its-kind supersonic unmanned aircraft vehicle, or UAV. The UAV, which is currently in a prototype state, is expected to fly farther and faster -- using less fuel -- than anything remotely similar to date.