Question

A jet fighter is operating at Mach number of 1.4. Wing chord is 1m then, find the location of aerodynamic centre.

(a) 0.4m

(b) 0.4

(c) 0.8m

(d) 0.8

The question was asked in an online interview.

My question is taken from Wing Geometry-1 topic in portion Airfoil and Geometry Selection of Aircraft Design

Answer 1

Right option is (a) 0.4m

The explanation is: Given, jet fighter aircraft which is cruising at Mach 1.4.

For such high speed aircraft, location of the aerodynamic center is given by,

Location of aerodynamic center = 40% of chord = 40% of 1 = 0.4*1 = 0.4m.