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  2. Aeronautical chart conventions (United States) - Wikipedia

    en.wikipedia.org/wiki/Aeronautical_chart...

    A sectional chart is a two-sided chart created from a Lambert Conformal Conic Projection [1] with two defined standard parallels. The scale is 1:500,000, with a contour interval of 500 feet. The size of each sectional is designed to be "arm's width" when completely unfolded.

  3. Airspace class (United States) - Wikipedia

    en.wikipedia.org/wiki/Airspace_class_(United_States)

    Class D airspace is delimited by a thin, dashed blue line, generally in the form of a circle centered on an airport. A number enclosed in a box surrounded by a similar dashed line (ceiling value) and usually within the class D area gives the upper limit of the airspace in hundreds of feet (the lower limit of class D is always the surface).

  4. Ceiling (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Ceiling_(aeronautics)

    Compared to service ceiling, the absolute ceiling of commercial aircraft is much higher than for standard operational purposes. In the Concorde 's case, it was tested to be 68,000 ft (21 km; 12.9 mi).

  5. Flight level - Wikipedia

    en.wikipedia.org/wiki/Flight_level

    Flight levels require defining altitudes based on a standard altimeter setting. All aircraft operating at flight levels set 1013 hPa or 29.92 inHg. On the descent when descending through the published transition level, the altimeter is set to the local surface pressure, to display the correct altitude above sea level.

  6. Floor plan - Wikipedia

    en.wikipedia.org/wiki/Floor_plan

    A floor plan is not a top view or bird's-eye view; it is a measured drawing to scale of the layout of a floor in a building. A top view or bird's-eye view does not show an orthogonally projected plane cut at the typical four foot height above the floor level. A floor plan may show any of the following elements: [3] interior walls and hallways ...

  7. Approach plate - Wikipedia

    en.wikipedia.org/wiki/Approach_plate

    An approach plate for the ILS or LOC approach to runway 14L at Cologne Bonn Airport, Germany.. Approach plates (or, more formally, instrument approach procedure charts) are the printed or digital charts of instrument approach procedures that pilots use to fly instrument approaches during instrument flight rules (IFR) operations.

  8. Maximum elevation figure - Wikipedia

    en.wikipedia.org/wiki/Maximum_Elevation_Figure

    MEF's of 4700 and 3300 feet are shown on this excerpt from the FAA's Los Angeles sectional aeronautical chart. Maximum elevation figure ( MEF ) is a type of visual flight rule (VFR) information that indicates the elevation of the highest geographical feature within a GEOREF quadrangle area.

  9. High-volume low-speed fan - Wikipedia

    en.wikipedia.org/wiki/High-volume_low-speed_fan

    The air flowing outward is called the "horizontal floor jet." Since the height of the floor jet is determined by the diameter of the column of air, a larger diameter fan naturally produces a larger air column and thus a higher floor jet. [8] Smaller high-speed fans of equivalent displacement are incapable of producing the same effect.

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