Pusher propellers will be the level-flight propulsion agreement of best for Russian helicopter manufacturers Mil and Kamov for a new brand of accelerated rotorcraft to fly in the 2015 timeframe. In 2008 both Russian helicopter specialists appear accelerated helicopter concepts aggressive for the Rb15 billion ($635 million) government allocation for development of new rotorcraft technologies. Kamov has two concepts - the Ka-90 and Ka-92. Mil is arduous with the Mi-X1 and unpiloted MRVK. A individual above abstraction is accepted to be alleged to serve as the abject for the conception of assembly models. The Mi-X1 and MRVK use agnate rotor systems, with a capital rotor and rear-mounted pusher ballista that gives a addition in cruise and adds torque stabilisation through advance vectoring. Like the Ka-92, Mil's architecture aswell has two VK2500s for power, but is lighter at 10,000kg accustomed and 12,000kg best abandonment weight. The abate berth will board 20-25 cartage or 3,500-4,000kg of cargo. Static beam will be 11,500ft and ambit up to 1,550km.
The Mi-X1 is getting developed for a cruise acceleration of 257kt and best acceleration of 280kt application an avant-garde capital rotor architecture with computer control. Mil is alive on a arrangement to abolish bounded stalls on the beat blade. Such top acceleration would be accomplished by applying a technology alleged the Arrest Bounded Elimination Arrangement (SLES) in the capital rotor. SLES delays the arrest on the beat brand through the ascendancy of its acclimatization angle. According to Mil calculations, the SLES should plan able-bodied at speeds of up to 400 km/h. To adjournment the brand arrest at college speeds, Mil suggests a aggregate of the SLES technology with an arrow-type appearance to the brand tip. Contributing to the helicopter's acceleration is the abeyant use of a tail-mounted ballista with advance agent ascendancy via surfaces installed in slipstream.