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Aircraft Structures
Aircraft Structures for Sheet Metal
| Question | Answer |
|---|---|
| The loads imposed on the wings in flight are stated in terms of _____ ______, which is the ratio of the total load supported by the airplane's wings to the actual weight of the airplane and its contents. | Load Factor |
| Stress that tends to crush or press together | Compression |
| Stress in a member when a force tends to elongate or stretch it. | Tension |
| Stress of twisting. | Torsion |
| A combination of compression and tension stresses. | Bending |
| Stress developed when a force tends to cause a layer of material to slide along an adjacent layer. | Shear |
| The effect of over-stressing a part or assembly to the point where a permanent deformation takes place | Strain |
| Longitudinal points along the fuselage of an airplane are determined by reference to a zero point known as the ________ | Datum |
| Hinged sections of the trailing edge of the left and right wing, which operate in series to provide lateral control of the aircraft. | Aileron |
| a surface such as an airplane wing, aileron, or rudder designed to obtain reaction from the air through which it moves. | Airfoil |
| A heavy structural member in the fuselage to contain pressure or fluids or to disperse concentrated loads. A heavy circumferential frame which may or may not be entirely closed by a web. | Bulkhead |
| a vertical reference line or plane parallel to the centerline of the airplane. Used to locate points or planes to the left or tight of the airplane centerline. | Buttock Line (Butt Line) |
| A beam or member supported at or near near one end only without external bracing. | Cantilever |
| the middle or central section of an airplane wing to which the outer wing panels are attached. | Center section |
| A frame shaped to the circumference of the fuselage diameter | Circumferential |
| On small aircraft, the area occupied by the pilot and the passengers. On cabin airplanes, if the pilot compartment is separated from the rest of the cabin, it is often called the cockpit. | Cockpit |
| A movable airfoil or surface, such as an aileron, elevator, flap, trim tab, or rudder, used to control the attitude or motion of an aircraft in flight. | Control surface |
| The hinged and removable sides of the pods or nacelles that cover the engines. | Cowl Panel |
| A removable cover or housing placed over or around an aircraft compartment or section, especially an engine. | Cowling |
| The hinged section of the horizontal stabilizer used to increase or decrease the angle of attack of the airplane | Elevator |
| The aft portion of an aircraft, usually consisting of a group of stabilizing planes or fins, to which are attached certain controlling surfaces such as elevators and rudders. | Empennage |
| A piece, part, or structure having a smooth streamlined contour; used to cover a non-streamlined object to smooth a junction. | Fairing |
| A term commonly applied to the vertical stabilizer (vertical fin) or any stabilizing surface parallel to the vertical center-line of the airplane Horizontal surfaces are commonly called stabilizers. | Fin |
| A fireproof or fire-resistant wall or bulkhead separating an engine from the rest of the aircraft structure to prevent the spread o a fire from the engine compartment | Firewall |
| Hinged section of the underside of the leading edge, which, when extended, reduces airflow separation over the top of the wing. | Leading edge flaps |
| Hinged section of the trailing edge of the wing, which can be lowered and extended; providing greater lift at lower speeds | Trailing edge flaps |
| a circumferential structural member in the body that supports the stringers and skin; used in semi-monocoque construction. | Frame |
| The cross-section shape of the stringers used in the fuselage; it is a common rolled shape that looks like a top hat with the brim curled up. | Hat Section |
| A principal longitudinal member of the framing of an aircraft fuselage or nacelle. It is usually continuous across a number of points of support. | Longeron |
| A fore and aft member of an airfoil structure of an aircraft used to give the airfoil section its forma and to transmit the load from the skin to the spar. | Rib |
| Any of the larger subassemblies of the airplane that are built separately and, when joined, form the complete airplane. | Section |
| The maximum distance, measured parallel to the lateral axis from tip to tip of any surface, such as a wing or stabilizer. | Span |
| a principal spanwise beam in the structure of a wing, stabilizer, rudder, or elevator. It is usually the primary load-carrying member in the structure. | Spar |
| a fixed horizontal tail surface that serves to maintain stability around the lateral axis of an aircraft. | Stabilizer |
| All parts of an airplane are identified by a location ore station number in inches from a beginning point | Station Line |
| Longitudinal member in the fuselage or spanwise member in the wing to transmit skin loads into the body frame or wing ribs. | Stringer |
| A supporting brace that bears compression loads, tension loads, or both, as in a fuselage between the longerons or in a landing gear to transmit the airplane loads. | Strut |
| Sometimes referred to as vertical stabilizer or fin. It is fixed to provide directional stability. The trailing edge is hinged to form the rudder. | Vertical Fin |
| A horizontal reference line or plane parallel to the ground used to located points vertically in the aircraft. | Waterline |
| A thin gauge plate or sheet that, when supported by stiffening angles and framing, provides great shear strength for its weight. Used in many applications throughout an aircraft because of its strength-to-weight ratio. | Web |
| An assemblage of members forming a rigid framework, which may consist of bars, beams, rods, tubes, wires, etc. | Truss |
| Type of truss construction where the longerons are connected with rigid vertical and lateral members called struts,and diagonal members designed to carry tension or compression loads. | Pratt Truss |
| Truss construction where longerons are connected only with diagonal members to absorb both compression and tension loads. | Warren Truss |
| A fuselage structure consisting of a framework of vertical and longitudinal members covered with a structural skin that carries a large percentage of the stresses imposed upon the structure. | Semimonocoque |
| A fuselage structure in which the fuselage skin carries all the structural stresses. | Monocoque |
Created by:
bgilbert