The Kamov Ka-20 (NATO codename Harp) was a Soviet specialised anti-submarine helicopter first seen in public in 1961. The Kamov Ka-20 was a twin-turbine helicopter powered by two Glushenkov shaft turbine engines providing a top speed of 220 kmh and a range of 650 km. Research Ka-20
 
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert