时间：2011-03-11 23:18来源：蓝天飞行翻译 作者：航空 点击：次
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squeeze bottle. A bottle made of a soft plastic material. The contents of the bottle can be forced out through a small opening in the cap by squeezing the sides of the bottle. squeeze riveter. A power riveting tool used to install solid aluminum alloy rivets in a sheet metal structure. The squeeze riveter can be made in the form of a C-clamp or an alligator clamp. One jaw of either type clamp is a fixed part of the riveter frame, and the other jaw is moved against the fixed jaw by the piston in an air cylinder. The fixed jaw is fitted with a rivet set that fits the manufactured head of the rivet, and the movable jaw is flat. Shims are placed under the rivet set so the jaws come close enough together to form a shop head of the correct thickness. Squeeze riveting is fast, and rivets are more uniform than those driven by a rivet hammer and bucking bar. squelch circuit (radio receiver circuit). A circuit in a radio receiver that keeps the volume down when no signal is being received. As soon as a signal is received, the squelch circuit allows it to come through loud enough to be comfortably heard. Squelch circuits are used in communications radios that receive long periods of silence between transmissions. squib (fire extinguishing system component). A small explosive charge that drives a cutter through the seal in a high-rate discharge (HRD) bottle of fire extinguishing agent. The container of fire extinguishing agent is sealed with a thin metal diaphragm. When the operator presses the AGENT RELEASE switch in the cockpit, the squib is ignited. As the squib burns, it produces enough gas pressure to drive a cutter through the metal diaphragm and release the agent into the fire extinguishing system. squirrel-cage induction motor. A type of AC motor whose rotor has current induced into it from stationary field coils. The rotor is made of a stack of soft iron laminations, mounted on a steel rotor shaft. Heavy copper end plates are fastened to the shaft at each end of the stack of laminations. Copper bars fit into slots in the laminations and are welded to each of the end plates. Changing magnetic fields, caused by AC flowing in the stator windings, induce a large amount of current into the low-resistance bars and the end plates. This current produces a strong magnetic field that reacts with the field in the stator, and the squirrel-cage rotor spins inside the stator. The speed of the rotor is determined by the frequency of the alternating current flowing in the stator windings. SRM (Structural Repair Manual). A maintenance manual issued by a manufacturer and approved by the FAA that describes, in detail, specific repairs that are approved for a particular aircraft structure. stabilator (aircraft primary flight control). A single-piece horizontal tail surface on an airplane which serves the purposes of both the horizontal stabilizer and the elevators. A stabilator must have some method of decreasing its sensitivity, and this is done with an antiservo tab on its trailing edge. The antiservo tab automatically moves in the same direction as the stabilator, and the aerodynamic force it produces opposes the movement of the stabilator. |
