This next generation spy plane will reportedly exceed its predecessor in nearly every way. “When it comes to a hypersonic system that’s going to carry a significant payload, there are a number of technical challenges,” he explained. Braun also points out that propulsion is an equally daunting challenge, noting that aircraft designed for subsonic flight (a Boeing 737, for example) have very different propulsion needs than supersonic fighter jets and hypersonic spy planes. However, the hypersonic vehicle has to be able to fly at all three speeds. “A hypersonic system is going to be relatively costly to build and operate,” Braun said.

Source: Nigerian Tribune January 20, 2018 18:30 UTC