If climb gradient is G, then which of the following is correct?(a) T/W ≥ G + 2*\(\sqrt{\frac{CD0}{ᴨ*e*AR}}\)(b) T/W ≥ G + 4*\(\sqrt{\frac{CD0}{ᴨ*e*AR}}\)(c) T/W ≥ G – 2*\(\sqrt{\frac{CD0}{ᴨ*e*AR}}\)(d) T/W ≥ G – 4*\(\sqrt{\frac{CD0}{ᴨ*e*AR}}\)This question was posed to me in a job interview.Asked question is from Selection of Thrust-Weight and Wing Loading in section Thrust-Weight Ratio and Wing Loading of Aircraft Design

If climb gradient is G, then which of the following is correct?(a) T/W

1.	If climb gradient is G, then which of the following is correct?(a) T/W ≥ G + 2\(\sqrt{\frac{CD0}{ᴨeAR}}\)(b) T/W ≥ G + 4\(\sqrt{\frac{CD0}{ᴨeAR}}\)(c) T/W ≥ G – 2\(\sqrt{\frac{CD0}{ᴨeAR}}\)(d) T/W ≥ G – 4\(\sqrt{\frac{CD0}{ᴨeAR}}\)This question was posed to me in a job interview.Asked question is from Selection of Thrust-Weight and Wing Loading in section Thrust-Weight Ratio and Wing Loading of Aircraft Design
Answer» The correct option is (a) T/W ≥ G + 2\(\sqrt{\frac{CD0}{ᴨeAR}}\) Best explanation: Climb GRADIENT is defined as the ratio between VERTICAL distance and horizontal distance travelled during climb. For positive wing loading, thrust loading should FOLLOW following condition. T/W ≥ G + 2\(\sqrt{\frac{CD0}{ᴨeAR}}\).

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