Another one of the many North American Space Agency's research centers.

-They are more or less specialized, each one offers propellants according to their work field.

-For example that of mercury ions, known as the SERT program (Space Electric Rocket Test), is about electric flows charged with ions expelled in one direction, producing a small thrust.

“Lewis Center, ion thruster”

-Formerly known as the Lewis Flight Propulsion Laboratory, its activity is to research cases like the following: a turbojet capable of reaching 2,600 miles per hour, Mach 4, working as turbine and ram. What catches our attention is the small compressor, compared to modern turbojets.

“Turbojet for Mach 4”