Besoh and Liu 



APPENDIX 



DESCRIPTION OF STRUT MODELS 



MODEL 2 



Model 2 was a blunt-based strut [4 J constructed of solid steel. 

 Its dimensions are shown in Figure 18, and its structural characteris- 

 tics are summarized in Table 1. Spanwise distributions of lift slope, 

 aerodynamic center, and noncirculatory modification factor are shown 

 in Figure 19. 



MODEL 2 T 



Model 2 T was constructed to the same specifications as 

 Model 2, except that a 2 -inch diameter pod was welded to its tip [4] . 

 Pod dimensions are shown in Figure 20. Weights were placed in the 

 body of the pod to produce different inertial configurations. 



STRUT -FOIL MODEL 



The strut [2] consisted of a solid bar of copper alloy covered 

 with flexible silicone rubber. The leading edge of the strut was coated 

 with a thin layer of plastic which was slit to reduce its stiffening effect 

 The strut profile closely resembled that of Models 2 and 2 T, except 

 for a rounded leading edge. Strut dimensions are shown in Figure 21, 

 Structural characteristics are given in Table 2. The three-dimension- 

 al loading curves for this strut were essentially the same as those 

 for Model 2, differing only in sweep angle. 



The pod and foils were machined from solid aluminium and 

 were attached to the strut with bolts. Dimensions for these compo- 

 nents are given in Figure 22. 



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