The Tupolev Tu-95 (Russian: Туполев Ту-95; NATO reporting name: "Bear") is a large, four-engine turboprop-powered strategic bomber and missile platform. First flown in 1952, the Tu-95 entered service with the Long-Range Aviation of the Soviet Air Forces in 1956 and is expected to serve the Russian Aerospace Forces until at least 2040. A development of the bomber for maritime patrol is designated Tu-142, while a passenger airliner derivative was called Tu-114. The aircraft has four Kuznetsov NK-12 engines with contra-rotating propellers. It is the only propeller-powered strategic bomber still in operational use today. The Tu-95 is one of the loudest military aircraft, particularly because the tips of the propeller blades move faster than the speed of sound. Its distinctive swept-back wings are set at an angle of 35°. The Tu-95 is unique as a propeller-driven aircraft with swept wings that has been built in large numbers. The design bureau, led by Andrei Tupolev, designed the Soviet Union's first intercontinental bomber, the 1949 Tu-85, a scaled-up version of the Tu-4, a Boeing B-29 Superfortress copy. A new requirement was issued to both Tupolev and Myasishchev design bureaus in 1950: the proposed bomber had to have an un-refueled range of 8,000 km (5,000 mi), far enough to threaten key targets in the United States. Other goals included the ability to carry an 11,000 kg (24,000 lb) load over the target. Tupolev was faced with selecting a suitable type of powerplant: the Tu-4 showed that piston engines were not powerful enough for such a large aircraft, and the AM-3 jet engines for the proposed T-4 intercontinental jet bomber used too much fuel to give the required range. Turboprop engines were more powerful than piston engines and gave better range than the turbojets available at the time, and gave a top speed between the two. Turboprops were also initially selected for the Boeing B-52 Stratofortress to meet its long range requirement, and for the British long-range transport aircraft, the Saunders-Roe Princess, the Bristol Brabazon and the Bristol Britannia. For more details on the development and design, operational history and 25 variants and derivatives, click here.