Funnel Area definition
Funnel Area means air space clearance at each end of a runway beginning at the end of the area mentioned in clause(k) (v) at the elevation of the end of runway and rising on a slope of 1 in 50 (for every 50 feet horizontal one foot vertical, known as glide angle) for a horizontal distance of 3,033 yards measured along and symmetrical about the extended center line of runway, the width of the Funnel Area at the end of the distance mentioned in clause (k) (v) being 707 yards flaring up to 1,333 yards at the end;(m) “Area of Restricted Height” means air space clearance at each end of a runway beginning at the end of Funnel Area above an elevation of 60 yards measured above the elevation of the end of the runway and with a width of 1,333 yards and a length of 5,000 yards measured along and symmetrical about the extended center line of the runway;(n) “Inner Horizontal Surface” means an air space clearance above an elevation of 50 yards over and above the established airfield elevation, the extent of this surface being limited to an area included within a radius of 4,333 yards measured form the geometrical center of the runway known as reference point; (o) “Inner Conical Surface” means air space clearance extended outward and upward from the periphery of the Inner Horizontal Surface for a distance of 2,333 yards, the slope of Conical Surface being 20 horizontal to one vertical protruding above;(p) “Outer Horizontal Surface” means air space clearance above an elevation of 166 yards over and above the established airfield elevation, the extent of this surface being limited to an area included between the outer periphery of Inner Conical Surface and a circle having a radius of 16,667 yards measured from the reference point; (q) “Transition Surface” means air space clearance joining two adjacent surfaces with a slope of 7 horizontal to one vertical measured outward and upward and all along the sides of runway Clearance Area, Funnel Area and Area of Restricted Height, the slope being measured at right angle to the runway axis except, at the ends of the Area of Restricted Heightwhere it will be measured parallel to it.
Funnel Area means air space clearance at each end of a runway beginning at the end of the area mentioned in clause (k) (v) at the elevation of the end of runway and rising on a slope of 1