- Industry: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
A step in the heat treatment of metal in which the metal is made hard but brittle. Most ferrous metals (metals containing iron) are hardened by heating them to a specified temperature and then quenching them in oil, water, or brine. Other metals can be hardened only by cold-working them: by rolling them between steel rollers or by bending or hammering them.
Industry:Aviation
A step in the installation of a new or overhauled engine in an aircraft. Lubricating oil is pumped through the oil passages in the engine, so all the bearing surfaces will be flooded with oil when the engine starts.
Industry:Aviation
A step in the machining of a metal part in which the part is turned to its correct dimension and given its final smoothness.
Industry:Aviation
A step in the manufacture of aircraft control cable assemblies.
After the terminals are installed on the cables, a load of 60% of the cable breaking strength is applied and held for a specified length of time. Prestretching prepares the cable for installation in the aircraft.
Industry:Aviation
A step in the manufacture of parts made from plastic resins. The components of the resin are mixed, and heat produced in the resin or heat applied externally causes the resin to cure, or change into a compound different from that of its components.
Industry:Aviation
A step-up transformer used to produce a high voltage. This high voltage causes a spark to jump across the electrodes of a spark plug inside the cylinder of a reciprocating engine. The primary winding of the spark coil consists of comparatively few turns of heavy copper wire, wound over a soft iron core. When primary current flows through this winding and through the breaker points, a magnetic field is formed that extends out beyond the secondary winding.
The secondary winding consists of many hundreds of turns of very fine copper wire wound on the outside of the primary winding. One end of the secondary winding connects to the primary, and the other end goes to the rotor of the distributor, a high-voltage selector switch that directs the high voltage to the proper spark plug.
When the breaker points open, primary current stops flowing, and its magnetic field instantly collapses. As it collapses, the lines of flux cut across the turns of wire in the secondary winding and induce a high voltage in it. This high voltage produces the spark in the spark plug.
Industry:Aviation
A stick with a rubber wick attached to its end. The wick is coated with Prussian blue dye and is raised up until it touches the rotor blade while the rotor system is turning at the prescribed speed. When the helicopter is shut down, the blades are examined, and the blade riding the lowest in its track will have a blue mark on it.
Industry:Aviation
A stiff rod in an aircraft control system that moves a control surface by either pushing or pulling on it.
Industry:Aviation
A stiff rod or hollow tube used to open the intake and exhaust valves of a reciprocating engine. One end of the pushrod rides in the cam follower, and the other end fits in a socket on one end of a rocker arm. When the cam follower rides up on the cam lobe, the pushrod transmits this movement to the rocker arm, and the rocker arm pushes the valve off its seat.
Industry:Aviation
A storage battery permanently installed across the output of a generator. The generator carries the normal electrical load and keeps the battery fully charged at all times. The battery supplies current to help the generator when the electrical load is unusually high.
Industry:Aviation
