. The chief designer of NPO "Energomash" Peter Liovochkin called the comparison of the characteristics of Russian rocket engine RD-180 propulsion system Elon musk Raptor is like comparing diesel and gasoline engines. "Mr. Musk, without being too technical, does not consider that the RD-180 engine for rocket vehicle Atlas will use a completely different fuel scheme -" oxygen-kerosene ", And that other characteristics of engine operation " - quoted Liovochkin on the Internet representation of the Russian space Agency. He said that "Energomash" has certified the RD-180 with a 10% margin, that is, the pressure in the combustion chamber above 280 ATM. Liovochkin said that the Raptor engine is working on the scheme "gas-gas" and that in such schemes a level of pressure in the combustion chamber is not something outstanding. "in your design for these schemes, we are laying the pressure level in the chamber is more than 300 atmospheres. And the parameter is the pressure in the chamber is not the output characteristic of the engine, such as thrust and specific impulse, " He explained. at the same time Lyovochkin said that, despite the competition of 2 manufacturers of engines, " as engineers, we welcome the initial success of the partners from the organization of SpaceX in the field of rocket engine ". "With the creation of the Raptor engine American engineers reached a record level of pressure in the chamber. This indicates a fairly high level of developments and production processes in the organization SpaceX, " said He. before SpaceX CEO Elon Musk said about the fact that the Raptor engine testing broke the record for the pressure in the combustion chamber is established by the RD-180 engine. According Mask, Raptor reached pressure 268, 9 bar (approx 274, 2 kilograms of force per square centimeter. Russian liquid rocket engine RD-180, according to information on the Internet representation of the manufacturer NPO "Energomash" develops pressure in the combustion chamber 261, 7 kilograms force per square centimeter. <span style="color:darkgray