- 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 ...
An instrument used to measure the temperature of molten metal inside a furnace. A piece of resistance wire extends across the optical path of the instrument, and current through the wire is increased until its heat causes the wire to glow.
The user of the instrument looks at the molten metal in the furnace through the instrument, and while watching it, increases the current through the resistance wire until it glows with exactly the same color as the molten metal. The indicator on the instrument converts the amount of current flowing through the resistance wire into terms of the temperature of the molten metal.
Industry:Aviation
An instrument used to measure the velocity of moving air. A cup-type anemometer uses a series of hemispherical metal cups mounted on arms on a shaft. The air blows the cups and rotates the shaft. A counter measures the number of revolutions the shaft makes in a given period of time and converts this into wind speed.
A fan-type anemometer uses a small, multibladed propeller, turned by the air moving through it. The faster the air flows, the faster the fan turns.
The dial on the anemometer may be marked in feet per second, meters per second, kilometers per hour, miles per hour, or knots.
Industry:Aviation
An instrument used to measure the viscosity of a fluid. A cup-type viscosimeter is a specially shaped cup with an accurately sized hole in its bottom.
The cup is filled with the fluid whose viscosity is to be measured, and the hole is opened so fluid can flow from it. The number of seconds is measured between the beginning of the flow and the time the first break in the flow occurs. This time relates to the viscosity of the fluid.
Industry:Aviation
An instrument used to measure very high values of resistance such as found in materials normally considered to be insulators. Megohmmeters use a high voltage to force current through the material and a sensitive indicator to measure the extremely small current that results.
Industry:Aviation
An instrument used to show the pilot or flight engineer the pressure of the lubricating oil being delivered to the engine bearings.
Industry:Aviation
An instrument used to show the pilot the rate at which the aircraft is climbing or descending. A rate-of climb indicator is a pressure instrument that compares the pressures inside and outside a metal capsule inside the instrument case. Static pressure is directed into the instrument case and also into the capsule, but to get into the capsule, the air must flow through a calibrated orifice (a tiny hole of a specific size).
When the aircraft is not changing altitude, the pressure inside the capsule is the same as that inside the instrument case. But when the aircraft is climbing or descending, the orifice causes the pressure inside the capsule to change more slowly than the pressure inside the case. This lag in the pressure change causes the capsule to expand or collapse until the pressure equalizes. The amount of expansion or collapse is measured, and it indicates on the instrument dial as the number of feet-per-minute climb or descent. Rate-of-climb indicators are also called vertical-speed indicators.
Industry:Aviation
An instrument used to show the rate of fuel flowing to an engine. Fuel flowmeters used with modern fuel-injected reciprocating engines are actually pressure gages that measure the pressure drop across the injector nozzles.
A popular flowmeter for turbine engines uses a small turbine in the fuel line to the fuel control unit that measures the rate of fuel flow. It converts this flow rate into an electrical signal and sends it to an indicator in the instrument panel.
Industry:Aviation
An instrument used with some of the larger reciprocating engines and turboprop engines to measure the amount of torque the engine is producing.
Industry:Aviation
An instrument which measures the rate of rotation of an object about an axis. A spinning gyroscope precesses, or tilts, when it is rotated in a plane at right angles to its own spin axis. The amount the gyroscope tilts is proportional to the rate at which it is rotated about an axis at right angles to both its spin axis and the axis of its precession (the axis about which it tilts). Rate gyros are used in turn and slip indicators and turn coordinators.
Industry:Aviation
Un agent de surface active, ou partiellement soluble contaminant qui est un sous-produit du traitement du combustible ou d'additifs de carburant. Surfactants adhèrent à d'autres contaminants et fais-les abandonnent le carburant et de s'installer au fond du réservoir de carburant comme les boues.
Industry:Aviation
