The ekranoplan had wingspan of 37.6 m, length - 92 m, maximum take-off weight - 544 tons. Until An-225 it was the largest aircraft in the world.KM was tested at the Caspian Sea for 15 years until 1980. In 1980, pilot error caused a crash without human casualties. The vehicle was too heavy to be recovered from its watery wrecksite.
1960s design. A mockup was built but no prototype.
Planned as an answer to the European Concorde Supersonic Transport. At 306 feet (93 m) long it would have been one of the longest airframes ever flown. Problems with the weight of the swing-wing mechanism and air friction heating in Mach 3 flight provoked a drastic redesign, by which time airline interest in SSTs was dropping because of environmental concerns. The U.S. Congress cut government funding and airlines began canceling orders.
Largest aircraft in the world 1947 to 1952 when the even heavier Boeing B-52 Stratofortress first flew. World's largest flying boat, and largest wingspan of any aircraft. Only one was ever built and it performed only one short flight.
KR-860 (Kryl'ya Rossii or Wings of Russia) early named as SKD-717 is super large transport aircraft with weights about 650 tonnes (Antonov An-225 weight is 600 tonnes), payload about 300 tonnes (An-225 payload is 250 tonnes) and 860 to 1000 passengers, a proposed Double decker wide-body Superjumbo jet by Russian aerospace company Sukhoi.