Aerostat

The branch of science that deals with the flight of lighter-than-air vehicles, such as balloons, dirigibles, or blimps. These vehicles are filled with hot air or with a gas ...

aerostats

Engineering; Mechanical engineering

Aerostats use buoyancy to float in the air in much the same way that ships float on the water. They are characterized by one or more large gasbags or canopies, filled with a ...

inductive reactance

Aviation; Aeronautics

An opposition to the flow of alternating current or changing direct current, caused by inductance in the circuit. Inductive reactance, whose abbreviation is XL, is measured in ...

interstate air transportation

Aviation; Aeronautics

The carriage by aircraft of persons or property as a common carrier for compensation or hire, or the carriage of mail by aircraft in commerce: # Between a place in a State or the ...

class of thread

Aviation; Aeronautics

A method of classifying the fit of threads used in bolts and nuts. A class-1 fit is a loose fit, a class-2 fit is a free fit, a class-3 fit is a medium fit, a class-4 fit is a ...

sonic cleaning

Aviation; Aeronautics

A method of cleaning delicate mechanical parts. The parts are placed in a sonic cleaning machine and covered with a cleaning fluid. High-intensity sound waves are produced in the ...

ultrasonic cleaning

Aviation; Aeronautics

A method of cleaning mechanical components by vibrating them at an ultrasonic frequency while soaking them in a cleaning solution.

electroplating

Aviation; Aeronautics

A method of coating one kind of metal with another. Cadmium is often plated on steel to make it corrosion resistant, and chromium can be plated on steel to make it hard and wear ...