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  2. Aerospace bearing - Wikipedia

    en.wikipedia.org/wiki/Aerospace_bearing

    Aerospace bearings are the bearings installed in aircraft and aerospace systems including commercial, private, military, or space applications. Materials include M50 tool steel (AMS6491), carbon chrome steel (AMS6444), the corrosion resistant AMS5930, 440C stainless steel, silicon nitride (ceramic) and titanium carbide-coated 440C.

  3. Bearing (navigation) - Wikipedia

    en.wikipedia.org/wiki/Bearing_(navigation)

    A standard Brunton compass, used commonly by geologists and surveyors to obtain a bearing in the field. In navigation, bearing or azimuth is the horizontal angle between the direction of an object and north or another object. The angle value can be specified in various angular units, such as degrees, mils, or grad. More specifically:

  4. Bearing (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Bearing_(mechanical)

    A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

  5. Aerospace engineering - Wikipedia

    en.wikipedia.org/wiki/Aerospace_engineering

    Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. [3] It has two major and overlapping branches: aeronautical engineering and astronautical engineering.

  6. Why RBC Bearings May Be About to Take Off - AOL

    www.aol.com/news/2011-12-21-why-rbc-bearings-may...

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  7. Ball bearing - Wikipedia

    en.wikipedia.org/wiki/Ball_bearing

    Working principle for a ball bearing; red dots show direction of rotation. A four-point angular-contact ball bearing. A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It ...

  8. Why the U.S. Military Needs to Imitate Ukraine’s Drone Force

    www.aol.com/news/why-u-military-needs-imitate...

    Ukraine is the first nation to have created a new military branch, the Unmanned Systems Forces of Ukraine. This is a pivotal moment akin to the creation of the world’s first air force, the Royal ...

  9. Heraldry - Wikipedia

    en.wikipedia.org/wiki/Heraldry

    The German Hyghalmen Roll was made in the late 15th century and illustrates the German practice of repeating themes from the arms in the crest. (See Roll of arms).. Heraldry is a discipline relating to the design, display and study of armorial bearings (known as armory), as well as related disciplines, such as vexillology, together with the study of ceremony, rank and pedigree.