Aeronautics

Aeronautics

The branch of science that deals with flight aerodynamics and with the operation of all types of aircraft.

Industry: Aviation

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Aeronautics

molybdenum

Aviation; Aeronautics

A hard, gray, metallic chemical element. Molybdenum’s symbol is Mo, its atomic number is 42, and its atomic weight is 95.95. One of the main uses of molybdenum is as an alloying agent for steel. ...

A hard, gray, or steel-blue metallic chemical element. Tantalum’s symbol is Ta, its atomic number is 73, and its atomic weight is 180.948. Tantalum is used in the manufacture of light bulb filaments, ...

tungsten

Aviation; Aeronautics

A hard, grayish-white, brittle, corrosion-resistant, metallic chemical element. Tungsten’s symbol is W, its atomic number is 74, and its atomic weight is 183.85. Tungsten, which melts at 3,400°C, is ...

ruthenium

Aviation; Aeronautics

A hard, white, acid-resistant, metallic chemical element. Ruthenium’s symbol is Ru, its atomic number is 44, and its atomic weight is 101.07. Ruthenium is used as an alloying agent for platinum and ...

amber

Aviation; Aeronautics

A hard, yellowish, translucent, fossilized tree resin that is currently used to make small ornaments. Centuries ago it was discovered that when a piece of amber was rubbed with wool, it attracted ...

race

Aviation; Aeronautics

A hardened and polished steel surface on which antifriction bearings roll. The races for ball bearings are grooves. For tapered roller bearings, the races are cones, and for needle bearings, the ...

journal

Aviation; Aeronautics

A hardened and polished surface on a rotating shaft that rides in a plain bearing. The bearing journal provides a smooth bearing surface and wears very little.