378 CHAPTER 12 Airworthiness
flaps are lowered and raised, producing additional load cycles in the flap support structure. Engine
pylonsaresubjectedtofatigueloadingfromthrustvariationsintake-offandlandingandalsotoinertia
loadsproducedbylateralgustsonthecompleteaircraft.
A more detailed investigation of fatigue and its associated problems is presented in Chapter 14,
whileafullerdiscussionofairworthinessasappliedtociviljetaircraftispresentedinJenkinsonetal.
[Ref.1].
Reference
[1] Jenkinson,L.R.,Simpkin,P.,andRhodes,D.,CivilJetAircraftDesign,Arnold,1999.