ZHUHAI /China/, November 9. /TASS/. Russia’s rocket engine producer Energomash and S7 Space will develop a technical design of an engine for a reusable rocket by the end of the year, Energomash CEO Igor Arbuzov told TASS at the Airshow China exhibition on Friday.

"We have now set up a joint working group to develop technical specifications for this engine that will be based on the RD-171MV. We will formulate its basic technical characteristics by the end of this year," the chief executive said.

It is presumed that the new engine should feature the option of its restart as compared to its prototype, Arbuzov said, adding that the number of engines had not been discussed at the talks with S7 Space.

As S7 Space CEO Sergei Sopov told TASS earlier, RD-171 engines can be used on the first stage of a reusable rocket, which this private company is developing on the basis of the conceptual design of the Soyuz-5 carrier (being developed by Energia Space Rocket Corporation).

The company has dubbed the new rocket "Soyuz-7" and "Soyuz-7SL" (Sea Launch).