The Antonov An-24 (Coke) is a 52-seater a short-range twin turboprop aeroplane developed during the 1950s, similar to the Fokker F 27Friendship. The An-24 is powered by two ZMDB Progress AI-24A turboprops providing a top speed of 498 kmh and a range of 640 km fully laden, increasing to 3000 km empty. The An-24 is fitted with high wings to minimize the risk of propeller damage on the USSR's many unsurfaced landing strips. Aeroflot's vast fleet contains more An-24s than any other airliner; over 1,000 fire-fighting, aerial survey and passenger versions have been built. The An-24 was adopted for military service in 1962 as a short-range utility freight transport aircraft. The military version of the An-24 carries a flight crew of five and up to 38 troops or 30 paratroops or 24 litters and one attendant or 4612 kg of freight in the hold. Research AN-24