By David J. Peery

Suitable for undergraduate scholars, this quantity covers equilibrium of forces, area constructions, inertia forces and cargo components, shear and bending stresses, and beams with unsymmetrical go sections. extra themes comprise spanwise air-load distribution, exterior quite a bit at the plane, joints and fittings, deflections of buildings, and specific tools of research. themes regarding an information of aerodynamics seem in ultimate chapters, permitting scholars to review the prerequisite aerodynamics themes in concurrent courses.

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**Example text**

The l& on the torque links B of the landing gear shown in Fig. 13 are deaired. SduEion. Considering the lower tube and lower torque link 88 a free body, 88 shown in Fig. 13@). Taking momenta about the tube center line, ZM = 60,OOo mi=0 the forcea are - Ri = 5,000 lb Now consideringone of the torque linksas a free body, 88 shown in Fig. 1. Find the forces in the two-force m e m h AO,BO, and CO of the etructure shown. hOB. 1. W B . 2. 2 Membem A0 and BO of thie landingetructure are tweforce membera.

In many problems the inertia force Ma can be found as a force in pounds by the equations of s t a t i ~ equilibrium, without first finding the mass and the acceleration. 46 INERTIA FORCE8 AND LOAD FACTORB 47 The airplane shown in Fig. 2 is moving forward after landing,and has a braking force F applied to the right. The acceleration is to the right, and the inertia force on each element of mass is to the left, or o p posite to the direction of acceleration. The sum of the inertia forces on all elements will be the prodW uct of the total m888 of the airplane and the acceleration,or Ma.

The mass in slugs is obtained by dividing the weight in poundt-by the acceleration of gravity g in feet per second per second. 2 lb. In many problems the inertia force Ma can be found as a force in pounds by the equations of s t a t i ~ equilibrium, without first finding the mass and the acceleration. 46 INERTIA FORCE8 AND LOAD FACTORB 47 The airplane shown in Fig. 2 is moving forward after landing,and has a braking force F applied to the right. The acceleration is to the right, and the inertia force on each element of mass is to the left, or o p posite to the direction of acceleration.