A civil A/C has maximum lift coefficient of 3. If wing loading is 120 then, find approach speed of the aircraft. Consider sea-level density.(a) 10.5m/s(b) 10.50km/s(c) 12(d) 120I have been asked this question in a national level competition.My question comes from Wing Loading topic in portion Thrust-Weight Ratio and Wing Loading of Aircraft Design

A civil A/C has maximum lift coefficient of 3. If wing loading is 120

1.	A civil A/C has maximum lift coefficient of 3. If wing loading is 120 then, find approach speed of the aircraft. Consider sea-level density.(a) 10.5m/s(b) 10.50km/s(c) 12(d) 120I have been asked this question in a national level competition.My question comes from Wing Loading topic in portion Thrust-Weight Ratio and Wing Loading of Aircraft Design
Answer» Correct option is (a) 10.5m/s The best I can explain: GIVEN, civil aircraft, MAXIMUM CL = 3, wing loading W/S = 120 Approach speed of civil aircraft is given by, VA = 1.3Vstall Where, Vstall = \(\SQRT{2(\frac{W}{S})/(ρCL)} = \sqrt{2(120)/(1.2253)}\) = 8.08m/s Now, Va = 1.3Vstall = 1.3*8.08 = 10.5m/s.

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