DARPA-Backed Phantom Express Scheduled For 2021 Flight Test

Credit: Boeing Concept
Boeing faces several technical hurdles in its quest to develop a business-jet-size reusable launch vehicle suitable for daily flights, but it has answered questions about whether the liquid-oxygen-and liquid-hydrogen-fueled AR-22 engine that will power the first stage is up to the task. On July 6...
Irene Klotz

Irene Klotz is Senior Space Editor for Aviation Week, based in Cape Canaveral. Before joining Aviation Week in 2017, Irene spent 25 years as a wire service reporter covering human and robotic spaceflight, commercial space, astronomy, science and technology for Reuters and United Press International.

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