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  2. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The best example is Flanges, there are multiple holes in the Flanges, the circle through the center of these holes is known as the pitch circle, and the diameter of this circle is known as Pitch Circle Diameter, in short PCD. PDM, PDMS: product data management, product data manager [app], product data management system [app]

  3. Aircraft flight dynamics - Wikipedia

    en.wikipedia.org/wiki/Aircraft_flight_dynamics

    The three axis of rotation in an aircraft. Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of gravity (cg), known as pitch, roll and yaw.

  4. Glossary of aerospace engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_aerospace...

    Flight management system – A flight management system (FMS) is a fundamental component of a modern airliner's avionics. An FMS is a specialized computer system that automates a wide variety of in-flight tasks, reducing the workload on the flight crew to the point that modern civilian aircraft no longer carry flight engineers or navigators. A ...

  5. List of gear nomenclature - Wikipedia

    en.wikipedia.org/wiki/List_of_gear_nomenclature

    A pitch plane in an individual gear may be any plane tangent to its pitch surface. The pitch plane of a rack or in a crown gear is the imaginary planar surface that rolls without slipping with a pitch cylinder or pitch cone of another gear. The pitch plane of a rack or crown gear is also the pitch surface. [1]

  6. Glossary of project management - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_project_management

    Scientific management is a theory of management that analyzes and synthesizes workflow processes, improving labor productivity. Scope of a project in project management is the sum total of all of its products and their requirements or features. Scope creep refers to uncontrolled changes in a project's scope. This phenomenon can occur when the ...

  7. Construction management - Wikipedia

    en.wikipedia.org/wiki/Construction_management

    Construction management (CM) aims to control the quality of a construction project's scope, time, and cost (sometimes referred to as a project management triangle or "triple constraints") to maximize the project owner's satisfaction.

  8. Glossary of structural engineering - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_structural...

    Most of the terms listed in glossaries are already defined and explained within itself. However, glossaries like this one are useful for looking up, comparing and reviewing large numbers of terms together. You can help enhance this page by adding new terms or writing definitions for existing ones.

  9. Aircraft principal axes - Wikipedia

    en.wikipedia.org/wiki/Aircraft_principal_axes

    The position of all three axes, with the right-hand rule for describing the angle of its rotations. An aircraft in flight is free to rotate in three dimensions: yaw, nose left or right about an axis running up and down; pitch, nose up or down about an axis running from wing to wing; and roll, rotation about an axis running from nose to tail.