Question

Determine sideslip angle for a steady level unaccelerated flight with [u, v, w] = [80, 2, 4.5].

(a) 1.43

(b) 5.4

(c) 5

(d) 12.32

I got this question in a job interview.

I'd like to ask this question from Lateral-Directional Static Stability and Control in division Stability, Control, and Handling Qualities of Aircraft Design

Answer 1

Right choice is (a) 1.43

Easiest explanation: Given, v = 2, V = [u^2+v^2+w^2] ^0.5 = [80*80+2*2+4.5*4.5] ^0.5 = 80.1521.

Sideslip angle = arcsine (v/V) = arcsine (2/80.1521) = 1.43°.