Question

Which of the following statement is not correct?

(a) The airborne distance is given by SA=\(\frac{W}{(F_N-D)_{av}}\Big\{\frac{V_{2}^2-V_{LOF}^2}{2g}+35\Big\}\)

(b) The ground run distance is given by SG=\(\frac{WV_{LOF}^2}{2g[F_N-D-\mu (W-L)]_{0.7V_{LOF}^2}}\)

(c) The ground run distance is directly proportional to aircraft weight

(d) The ground run distance is directly proportional to aircraft drag

This question was addressed to me during an internship interview.

The above asked question is from Effect on the Take-off Distances of Flight Variables in portion Take-off and Landing Performance of Aircraft Performance

Answer 1

Correct choice is (d) The ground run distance is directly proportional to aircraft drag

Easiest explanation: The correct statements are as follows:

The airborne distance is given by SA=\(\frac{W}{(F_N-D)_{av}}\Big\{\frac{V_{2}^2-V_{LOF}^2}{2g}+35\Big\}\)

The ground run distance is given by SG=\(\frac{WV_{LOF}^2}{2g[F_N-D-\mu (W-L)]_{0.7V_{LOF}^2}}\)

The ground run distance is directly proportional to aircraft weight.