Hermeus's Chimera engine combines turbojet and ramjet operation in a single system, targeting Mach 5 commercial flight by the mid-2030s after 70 years of failed attempts.
Radio Hangar explores Hermeus and the Chimera Engine, the Turbojet That Turns Into a Ramjet in Flight, and the Long Road From Mach Five on a Test Stand to a Passenger Someday.
Atlanta startup Hermeus is developing the Chimera combined-cycle engine targeting Mach 5 commercial flight, which would cut New York-to-London transit time to roughly 90 minutes.