Coal Aston Airfield also known as Apperknowle Airstrip, is a general aviation airfield located in the village Apperknowle, Derbyshire, 5.8 mi (9.3 km; 5.0 nmi) south of Sheffield. The unlicensed airfield is just south of a ridge of high ground to the north-east of Dronfield, close to the villages of Summerley, Apperknowle and Coal Aston. There has been a Coal Aston airfield since the World War I, though not here; RAF Coal Aston was on what is now the Jordanthorpe estate in south-east Sheffield, 1.7 miles (2.7 km; 1.5 NM) to the north-west. By the late 1920s this had become a civil field which promised, until World War II, to become Sheffield's airport. The airfield is operated from an on-site farmhouse and prior permission is required for landing. Its single strip grass runway is 660 m long and not entirely flat, with a dip in the middle and a hump at the eastern end. The older hangar at Coal Aston is a Blister-type hangar, a type made familiar during the interwar years.