Airport Engineering
According to the International Civil Aviation Organization (I.C.A.O.), the runway lengths of aerodromes, have been coded by

First Seven English alphabets
Last Seven English alphabets
Seven English alphabets
First seven natural numbers

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Airport Engineering
Wing loading of an aircraft is

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

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Airport Engineering
Speed of

All listed here
Sound at 0°C is called one Mach
Sound at 0°C is 1190 kmph
Sound varies 2.4 kmph per degree centigrade rise in temperature

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