The Lockheed Jetstar is a small four-engined utility transport aircraft. When cruising at Mach 0.5 at an altitude of 40,000 ft, the roll and yaw transfer functions are given by (a) Evaluate the...

The Lockheed Jetstar is a small four-engined utility transport aircraft. When cruising at Mach 0.5 at an altitude of 40,000 ft, the roll and yaw transfer functions are given by

(a) Evaluate the stability mode characteristics at this flight condition against the flying qualities requirements. (b) What negative feedback is required to improve the stability characteristics of this aircraft? Illustrate your answer with a italic of the appropriate root locus plot(s), and state the most significant effects of the feedback with reference to the requirements.