A new Russian medium-class launch vehicle Soyuz-5, was launched overnight on Friday from the Baikonur Cosmodrome in Kazakhstan as part of its first flight tests, Russia’s state space corporation Roscosmos said. ADVERTISEMENT ADVERTISEMENT According to Roscosmos, the Soyuz-5 is equipped with what it described as the world’s most powerful liquid-fuelled rocket engine. The launch marked the first test flight of the new-generation rocket. Roscosmos said the first and second stages operated normally