The solid propellant charge is firmly fastened to the motor casing, with a channel of cylindrical - conical shape with inclined ring groove of "umbrella" type, made of composite propellant of START type.
The nozzle unit is central stationary nozzle partially deepened into the combustion chamber, with telescopic extendable cone head.
Partially deepened nozzle with expendable head provides an advantage over the engines with traditional nozzles for rocket configurations with limitations on length.
The motor is used as a rocket second stage sustainer.