This thesis compares techniques for model order reduction and applies them to a slewing flexible beam. It begins with an introduction to model order reduction and how it is used in structural dynamics, systems and control, and numerical mathematics. It then models a slewing flexible beam experimentally and using finite element analysis. Different reduction techniques are compared qualitatively and quantitatively, including static condensation and fixed interface methods. The thesis concludes that the accuracy of reduced models depends greatly on the choice of master degrees of freedom and that fixed interface component mode synthesis may provide more accurate results over a wider frequency range than static condensation.