A general aviation aircraft, with a wing surface area of 18 square metres, flies at sea level with a speed of 180 kilometres per hour. Its lift curve is shown below. Given that lift equals weight for this aircraft and that the aircraft flies at a 8 degree angle of attack, what is its mass (in kilograms)?
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I’m not sure
2191.5
Given that lift equals weight for this aircraft, we know that:
From the given graph we can see that at an angle of attack of 8 degrees, the lift coefficient of the aircraft's wings is about 0.78. Since it flies at sea level we know that the air density is 1.225 kilogram per cubic metre. Also the wing area is given to be 18 square metres, and we can convert the airspeed to 50 metres per second. Then:
Given that lift equals weight for this aircraft, we know that:
From the given graph we can see that at an angle of attack of 8 degrees, the lift coefficient of the aircraft's wings is about 0.78. Since it flies at sea level we know that the air density is 1.225 kilogram per cubic metre. Also the wing area is given to be 18 square metres, and we can convert the airspeed to 50 metres per second. Then:
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