- Industrie: 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 type of friction-held fastener used to join mechanical parts. Neither end of the fastener is enlarged to form a head. A roll pin is an example of a headless fastener.
Industry:Aviation
A type of fuel metering system used on some reciprocating engines. When air flows into the engine, it passes through a venturi in the carburetor. The venturi produces a pressure drop proportional to the volume of air flowing into the engine cylinders.
The low pressure caused by the venturi pulls the correct amount of fuel through a metering jet, and this fuel is mixed with the air before it enters the cylinders.
Industry:Aviation
A type of fuel nozzle in a gas turbine engine in which all of the fuel is fed to the nozzle through a single fuel manifold.
Industry:Aviation
A type of fuel nozzle that discharges its fuel into the combustor, or burner, at two different rates and flow patterns; one for low airflow and the other for high airflow.
These flow patterns determine the shape of the flame inside the burner and both flow patterns keep the flame centered in the burner so it will not touch the thin metal of which the burner is made.
Industry:Aviation
A type of fuel quantity indicating system that shows the amount of fuel in the tanks of an aircraft.
The sending units (probes) inside the fuel tank are cylindrical capacitors made of two concentric metal tubes. These probes, connected in parallel, reach across the tank from top to bottom. When the tank is full of fuel, the fuel acts as the dielectric, but when the tank is empty, air is the dielectric.
The capacitance of a capacitor is directly proportional to the dielectric constant (k) of the material between its plates. Air has a k of one, and the fuel has a k of approximately two, depending upon its temperature and thus its density.
The system contains an automatic balancing capacitance bridge and an indicator. The bridge measures the capacitance of the tank probes, which varies directly with the amount of fuel in the tanks. The capacitance is converted into terms of pounds of fuel in the tanks, and this is shown on the indicator.
Industry:Aviation
A type of fuel system commonly used in large transport-category aircraft. All fuel tanks feed into a common manifold, and the dump chutes and the single-point fueling valves are connected to the manifold. Fuel lines to each engine are taken from the manifold.
Industry:Aviation
A type of fuel system used in large aircraft that allows all the fuel tanks to be fueled from a single point, usually under the wing.
A central refueling system is also called a single-point fueling system, or a pressure fueling system.
Industry:Aviation
A type of furnace used for making alloys of certain metals. The heat that melts the metal is produced by passing a large amount of electrical current through it.
Industry:Aviation
A type of furnace used to melt iron and steel. The metal is melted by passing hot gases over the charge of metal on the floor, or hearth, of the furnace.
Industry:Aviation
A type of fuse used to protect an electrical circuit from an excess of current. The fusible link, the part of the fuse that melts when too much current flows through it, is held between metal ferrules, or caps, that screw onto each end of an insulating tube. The ferrules are held in special fuse clips inside the fuse box.
Industry:Aviation
