sentences:  The AW.15 Atalanta was designed to meet a 1930 Imperial Airways requirement for a four-engined airliner for its African lines, in particular for the service between Kisumu in Kenya and Cape Town, South Africa.The specification called for an airliner that could carry nine passengers, three crew and a load of freight for 400 mi (640 km), cruising at 115 mph (185 km/h) at 9,000 ft (2,740 m).Imperial Airways had decided to standardise on four-engined aircraft to prevent the failure of a single engine causing forced landings.