Today, Major General Valery Menshikov, who is Deputy General Director of the State Space Research and Production Center named after M.V. Khrunichev, as well as the director and supervisor of the Research Institute of Space Systems named after A.A. Maximov shared with the press a curious fact. It turns out that on the current Yubileiny satellite, a new generation engine was installed, in which, according to the major general, “the unknown phenomenon of the interaction of the working fluid with fields, the nature of which has been little studied,” is used. No details about the principles of the "gravitsapy", as the engine creators dubbed it, are not known, except that the impulse occurs due to "movement inside the apparatus of a liquid or solid working fluid along a certain trajectory resembling a tornado shape." Comrade Menshikov also noted that “a similar engine has already been tested on Earth,” and the development of a new engine that is planned to be used in “nanosatellites” will not stop, despite the “frenzied rebuff of people who do not want to dare” (Comrade Menshikov hints at a commission to combat pseudoscience of the Russian Academy of Sciences, organized by Vitaly Ginzburg).
UPD (from WiKi): “It was announced that in May 2008 the Yubileiny satellite with inertial was launched, but this information does not have official confirmation.”