Ключевые слова: aircraft, august, black hawk, blackhawk, blade, blades, city, dark, day, daylight, flying, four blade, gray, gray sky, grey, helicopter, narke, orebro, outdoor, outdoors, rain, rainday, rainy, scandinavia, sikorsky, sky, summer, summer weather, sweden, uh 60, uh 60 black hawk, weather,