时间：2011-03-11 23:18来源：蓝天飞行翻译 作者：航空 点击：次
|
stapler. A tool for driving staples through a piece of wood or a stack of paper. starboard side. The right side of an aircraft or ship as viewed looking forward. STAR (standard terminal arrival). A preplanned instrument flight rule (IFR) air traffic control arrival procedure published for pilot use in graphic and/or textual form. STARs provide transition from the en route structure to an outer fix or an instrument approach fix/arrival waypoint in the terminal area. STAR charts (Standard Terminal Arrival charts). Aeronautical charts designed to expedite air traffic control route procedures and to facilitate transition between en route and instrument approach procedures. starter (engine component). A device used with either a gas turbine engine or a reciprocating engine that can be coupled to the engine to turn it over fast enough for it to start and run normally. starter-generator. A combination electrical component installed on some small gas turbine engines. The starter-generator acts as a motor to start the engine, and after it is running, electrical relays change the circuitry inside the unit so it functions as a generator. starting torque (electric motor characteristic). The amount of torque produced by an electric motor when the rotor first begins to turn. Series-wound motors have a high starting torque, and shunt-wound motors have a low starting torque. start winding (induction motor winding). An auxiliary winding in parallel with the run winding in the stator of a single-phase induction motor. The phase of the current in the start winding is different from that in the run winding. When current is flowing through both windings, a rotating magnetic field is produced which causes the rotor to turn. As soon as the rotor reaches a predetermined speed, a centrifugal switch opens the start winding, and the motor operates on the run windings alone. state of charge (battery condition). The condition of a storage battery with regard to the amount of charge in it. The state of charge of a lead-acid battery can be determined by measuring the specific gravity of the electrolyte, but the state of charge of a nickel-cadmium battery can be determined only by completely discharging it and measuring the amount of charge put back into it. static. Still, not moving static balance (aircraft control surface). A condition of balance of an aircraft control surface in which the surface balances about its hinge line. Lead weights are often installed in parts of the surface ahead of the hinge line to balance the surface. Controls are statically balanced to prevent control-surface flutter. static charge (electrical charge). The electrical charge on a body caused by an accumulation of electrons on one part of the body and a deficiency of electrons on another part. The part having the excess of electrons has a negative charge, and the part with the deficiency of electrons has a positive charge. static discharger. A device attached to an aircraft control surface to discharge static electricity into the air. Static electricity builds up as air flows across the surface. If it were not discharged, it could build up high enough to cause a spark to jump between the surface and the main structure. Sparks of this type cause radio interference. |
