Airport Engineering
Runway threshold is indicated by a series of parallel lines starting from a distance of

6 m from runway end
3 m from runway end
10 m from runway end
15 m from runway end

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Airport Engineering
Wing loading of an aircraft is

Load of the wings
Gross total weight of the aircraft/total available H.P of engines
Gross total weight of the aircraft/ wing area
Gross total weight of the aircraft/ load of the wings

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