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  2. Uncontrolled airspace - Wikipedia

    en.wikipedia.org/wiki/Uncontrolled_airspace

    It is the opposite of controlled airspace. It is that portion of the airspace that has not been designated as Control Area, Control Zone, Terminal Control Area or Transition Area. [1] According to the airspace classes set by the International Civil Aviation Organization (ICAO), the uncontrolled classes of airspace are class F and G. [2]

  3. National Airspace System - Wikipedia

    en.wikipedia.org/wiki/National_Airspace_System

    Class G airspace is uncontrolled airspace which extends from the surface to either 700 or 1,200 ft. AGL depending on the floor of the overlying Class E, or to the floor of Class A where there is no overlying Class E. In the vicinity of an uncontrolled airport, the CTAF for that airport is used for radio communication among pilots.

  4. Airspace - Wikipedia

    en.wikipedia.org/wiki/Airspace

    Class A airspace is generally the airspace from 18,000 feet (~3.4 miles, 5.5 km) mean sea level (MSL) up to and including flight level (FL) 600 (~11.4 miles, 18.3 km), including the airspace overlying the waters within 12 nautical miles (NM) (~13.8 miles, 22.2 km) of the coast of the 48 contiguous states and Alaska. Unless otherwise authorized ...

  5. List of dimensionless quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_dimensionless...

    plasma physics (ratio of a resistive time to an Alfvén wave crossing time in a plasma) Perveance: K = charged particle transport (measure of the strength of space charge in a charged particle beam) Pierce parameter

  6. List of physical quantities - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_quantities

    Molar heat capacity: c: Heat capacity of a material per unit amount of substance J/(K⋅mol) L 2 M T −2 Θ −1 N −1: intensive Moment of inertia: I: Inertia of an object with respect to angular acceleration kg⋅m 2: L 2 M: extensive, tensor, scalar Optical power: P: Measure of the effective curvature of a lens or curved mirror; inverse of ...

  7. Does Uncle Sam Consider Your Backyard Restricted Airspace? - AOL

    www.aol.com/news/does-uncle-sam-consider...

    The areas where you need FAA approval to fly a model plane or drone are surprisingly large.

  8. List of physical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_constants

    The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. Many of these are redundant, in the sense that they obey a known relationship with other physical ...

  9. Visual meteorological conditions - Wikipedia

    en.wikipedia.org/wiki/Visual_meteorological...

    In uncontrolled airspace there is less risk of a VFR aircraft colliding with an instrument flight rules (IFR) aircraft emerging from a cloud, so aircraft are permitted to fly closer to clouds. An exception to this rule is class B airspace , in which ATC separates VFR traffic from all other traffic (VFR or IFR), which is why in class B airspace ...