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Question 6:

The thrust required for a cargo aircraft to fly

straight, level and steady was measured. In each

measurement the speed and altitude of the

aircraft was the same but the weight changed.

When the weight was 130 kN, empty weight

with no cargo and little fuel, the thrust required

was T = 18.3 kN. When the weight was 30 kN

above the empty weight the thrust required

increased by dT = 0.41 kN (Total thrust in this

case is T+dT kN). What (total) thrust would be

required to fly at the same speed and altitude if

the weight was 50 kN above the empty weight?

The answer should have units of kN.

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