KeRC is the Keldysh Research Center.

-Related to GDL and GIRD around 1933 they made the "Katiusha" rockets, continuously updating them.

-They have made LRE (Liquid Rocket Engines) and also SRM (Solid propellant Rocket Motor) engines including HRE (Hibrid Rocket Engines).

-The KeRC engines with advanced combustion cycle devices have been mounted on the “Proton”, “Zenith“, "Energia” launchers.

"Keldysh HRE and SRM engines"

“Mobile unit with Katiushas”

From Appendix 10: New and more “powerful” ion engine with six coils, recently taken from a Russian magazine.

“Hall-effect engine”

-Test at Keldish Research Center (KeRC).