By David J. Peery

ISBN-10: 0486485803

ISBN-13: 9780486485805

Suitable for undergraduate scholars, this quantity covers equilibrium of forces, house buildings, inertia forces and cargo elements, shear and bending stresses, and beams with unsymmetrical go sections. extra subject matters comprise spanwise air-load distribution, exterior quite a bit at the aircraft, joints and fittings, deflections of buildings, and specified equipment of study. subject matters related to a data of aerodynamics look in ultimate chapters, permitting scholars to check the prerequisite aerodynamics themes in concurrent courses.

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**Example text**

No. 17. Sd& The aide trueses are first d y a e d 89 coplanar trusses CSrrJring loads of 500 Ib. The forces obtained are shown in Fig. 17. Thew! 3 Member ER BE' BB' BC' CC' I Forcea resulting from Mlolbperade Forces resulting from 10,ooO in-lb, torsion Total forcerr -632 +a8 +266 -286 +319 0 0 0 Co' +638 Do' -532 0 Eo' -319 0 +3€9 -286 +319 0 -319 d +319 -266 +a7 -m -819 This structure is in reality statically indeterminate, and the t o r s i o d analysis gives only approximate values of the forces in the members.

3, by a summation of form along each axis, considering the tension coefficients for the three members as the unknowns. It is not necessarg to find the direction cosines, as the force components will be the product of the tension coefticients and the length components. After finding the tension coe5cients the forces are found as the product of the coefficients and the lengths of the members. 10. Analyse the structure of Example 1, Art. 5, assuming the vertical load of 20 lb/i. to act midway between the spars and the drag load of 5 lb/in.

7. 186 sec Since this landing shock occurs for such a short intewd of time, it may be less injurious to the structure and less disagreeableto the passengers than a 8u& tsined load would be. Example 4. The 8,000-lb airplane shown in Fig. 5g. Find the wheel reactions A and B, d g them to be psrallel. 9. ~~. The vertical inertia force is found from the vertical acceleration. Mh=- O0O 3 . 5 ~= 28,000 Ib B - This force acts in a direction opposite to the acceleration, or downward. The horiEontal inertia force is found in a similar manner, and acts forward at the center of gravity.

### Aircraft Structures by David J. Peery

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