Civil Engineering - Airport Engineering - Discussion
Discussion Forum : Airport Engineering - Section 1 (Q.No. 40)
40.
The air is blowing at a speed of 75 knots in the direction of the aircraft flying at a ground speed of 775 knots. The air speed of the aircraft, is
Discussion:
15 comments Page 2 of 2.
Abdullah khan said:
7 years ago
It should be 700.
Haroon said:
6 years ago
It is 850knot the air blowing speed is in the same direction so 775+75 = 850knots,
If it is in the opposite direction.
775-75 = 700knots.
If it is in the opposite direction.
775-75 = 700knots.
Lav yadav said:
5 years ago
Right @Haroon.
775+75=850 is the correct answer.
775+75=850 is the correct answer.
Vim said:
5 years ago
Right, Thanks @Haroon.
Atta ur rahman said:
4 years ago
700knots is correct. But since 675knots is nearest to 700 than other options.
So, Ground speed is how fast an aeroplane is travelling, relative to a fixed point on the ground. Think of it this way: Ground speed is how fast an aeroplane's shadow would move across the land. If there's a strong wind pushing an aircraft, that's reflected in the ground speed.
Airspeed is how fast an aeroplane is really flying strictly under its own power, which is calculated by subtracting the wind speed from the ground speed.
So, Ground speed is how fast an aeroplane is travelling, relative to a fixed point on the ground. Think of it this way: Ground speed is how fast an aeroplane's shadow would move across the land. If there's a strong wind pushing an aircraft, that's reflected in the ground speed.
Airspeed is how fast an aeroplane is really flying strictly under its own power, which is calculated by subtracting the wind speed from the ground speed.
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