Introduction During the twentieth century, more progress has been made in Technology and Science than was made in all the previous centuries since the beginning of time. The Apollo program program has established the reality of travel between the earth and the moon and the possibility of establishing manned research stations on the surface of […]
Conventional wings are of three general, monospar, two spar and multiple star. True stressed skin wings may have shear webs but no true “spars”. The monospar wing has only one spar, the two spar wing has two spars as the name indicates, and the multispar wing has more than two spars. A wing spar, sometimes […]
In general, we can say that fuselages are classified in three principle types, depending upon the method by which stresses are transmitted to the structure. The three types according to this classification are truss, semimonocoque, and monocoque. A truss is an assemblage of members forming a rigid framework, which may consists of bars, beams, rods, […]
Trim Tabs Trim tabs trims the aircraft in flight. To trim means to correct any tendency of the aircraft to move towards an undesirable flight attitude. Trim tabs control the balance of an aircraft so that it maintains straight and level flight without pressure an the control column, control wheel, or rudder pedal. Note that […]
Although the dihedral and incidence angle of conventional modern aircraft cannot be adjusted . They should be checked at specified periods and after heavy landings or abnormal flight loads to ensure that the components are not distorted and that the angle within permitted limits. The relevant figures together with permitted tolerances are specified in the […]
Types of Landing Gear can be further divided up into Cantilever Semi cantilever Braced structure Cantilever Usually employed on the small aircraft, although in clean design it has been used in larger aircraft. It consists of shock absorber attached at its upper end to the aircraft structure and its lower and carried the wheel and […]
On heavy aircraft, the need to spread the weight over a large area has resulted in the use of multiple wheel undercarriages. The undercarriage unit normally consists of shock absorber strut, at the lower end of which a bogie beam is pivoted, and the axels are attached to each end of the beam. On some […]
Retraction tests should be carried out following replacement of a faulty component, whenever incorrect operation is reported or suspected, and after a hard or over weight landing. The sequence of operation will depend on the particular installation and type of retraction system concerned, and full details should be obtained from the relevant Maintenance Manual. The […]
Brakes are fitted to an Aircraft for the following reasons. To enable the Kinetic energy of the moving aircraft to be converted into heat through the medium of friction, so reducing the forward motion of the aircraft during a landing run. To permit the aircraft to be steered while taxying on the ground. To restrict […]
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