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Determine required static margin if lift curve slope is 6.5 per rad and pitching moment coefficient slope as -0.58 per rad.(a) 8.9%(b) 78%(c) 0.89(d) 8.403The question was posed to me during an internship interview.This intriguing question originated from Longitudinal Static Stability and Control-2 in portion Stability, Control, and Handling Qualities of Aircraft Design

Answer»

Correct option is (a) 8.9%

For EXPLANATION I would SAY: Static Margin = – (moment COEFFICIENT SLOPE/lift curve slope)

= -(-0.58/6.5) = 0.089 = 0.089*100% = 8.9%.



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