According to RIA Novosti, the engine, for the spaceplane, has already been tested and is expected to make its public debut in September at the International Military Technology Forum. The report quotes a Lieutenant Colonel Solodovnikov, who states the plane will take off and patrol the skies like a regular bomber. Once given the command, the bomber would ascend into space and could hit any target on Earth with nuclear warheads within one or two hours.
Russia's Ministry of Defense has denied reports a space bomber is in development, saying it was "out of the question" but not outside its technical level of expertise. The Ministry says that remarks about a hypothetical spacecraft were misinterpreted by the state-run press. While a denial is a denial, the exact date for the engine's public debut is curious. It could be that the engine is real, and that a space bomber was a hypothetical use.
It would weigh "between 20 and 25 metric tons." That is not much for a plane—in fact, it's roughly the mass of the F/A-18E Super Hornet. And yet somehow, a plane that light is supposed to carry at least one nuclear weapon, fly like a regular aircraft, power itself into space, and then return to base, all on its own.
The Russians did have the Buran spacecraft, which was a smaller version of the US space shuttle The construction of the Buran-class space shuttle orbiters began in 1980, and by 1984 the first full-scale orbiter was rolled out. Construction of a second orbiter (OK-1K2, informally known as "Ptichka") started in 1988. The Buran programme was officially cancelled in 1993.
Russia has previously proposed an orbital spaceplane, called cosmoplane. It would be capable of transporting passengers has been proposed by Russia's Institute of Applied Mechanics. According to researchers, it could take about 20 minutes to fly from Moscow to Paris, using hydrogen and oxygen-fueled engines.
SOURCES - Esquire, wikipedia