Airport Engineering
The size of landing area for multi engine helicopters operating under 1 FR conditions is

60 m × 120 m
30 m × 30 m
22.5 m × 30 m
22.5 m × 22.5 m

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Airport Engineering
Wing loading of an aircraft is

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

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