MOSCOW, July 8 Tests of the RD-191M engines, which will increase the payload capacity of the Angara rocket, have been completed, reported » Roscosmos».
“Testing of developmental engines RD-191M has been completed,” the message says. 
It is noted that the single-chamber liquid engine is intended for the Angara-A5M heavy-class rocket of the Amur space rocket complex (this is the name of the Angara complex at the Vostochny cosmodrome.
The RD-191M engine runs on kerosene and liquid oxygen. The RD-191M differs in thrust level from the “base” RD-191 engine — it is boosted by 10%. In the future, rockets with boosted engines will be able to send cargo to the Russian orbital station. .