Fundamentals of Aerodynamics
Fundamentals of Aerodynamics
6th Edition
ISBN: 9781259129919
Author: John D. Anderson Jr.
Publisher: McGraw-Hill Education
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Chapter 4, Problem 4.14P

The question is often asked: Can an airfoil fly upside-down? To answer this, make the following calculation. Consider a positively cambered airfoil with a zero-lift angle of 3 ° . The lift slope is 0.1 per degree. (a) Calculate the lift coefficient at an angle of attack of 5 ° . (b) Now imagine the same airfoil turned upside-down, but at the same 5 ° angle of attack as part (a). Calculate its lift coefficient. (c) At what angle of attack must the upside-down airfoil be set to generate the same lift as that when it is right-side-up at a 5 ° angle of attack?

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9.1 through 9.4 Determine by direct integration the moment of inertia of the shaded area with respect to the y axis. 9.5 through 9.8 Determine by direct integration the moment of inertia of the shaded area with respect to the x axis. y-4h (-) Fig. P9.3 and P9.7 X y D ykx4 Fig. P9.4 and P9.8 b X
Figure 1 shows the prosthesis inserted into the hip. Data Figure 2 shows the most important geometric dimensions (in centimeters) of the implant, as well as the most risky and problematic sections from a structural strength perspective. To simplify the analysis, the resistant sections will be assumed to be circular. The load will be assumed to act at the midpoint of the cylinder, as shown in Figure 2, with an additional safety condition of five times the person's weight. The person in question weighs 894 N (approximately 91.2 kg). The characteristics of the possible materials to be used are found in Table 1. Note that Chromium-cobalt casting has a different behavior in compression and tension. Determine The maximum and minimum stresses, as well as the shear stress, to which the part is subjected in the A-A plane. Assume it is a cylinder with a diameter of 12.7 mm. Draw the Mohr circle for the stressed state using software. Select the material for the prosthesis, which must be…
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