To report heights, elevations, distances (widths, lengths), etc., even if the original dataĪre sometimes expressed in feet or nautical miles.ĭata is reported as being expressed in WGS84 datum (latitude, longitude), altough the specificiation However, please note that meters (or kilometers) are always used The data schema is generally as close as possible to the original schema data described The driver is able to read the following files :Įach file will be reported as a set of layers whose data schema is given below. This data is for example used by the X-Plane and Flighgear software. The X-Plane aeronautical data is supported for read access. Works for most turboprops.X-Plane/Flightgear aeronautical data (available from GDAL 1.6.0) X-Plane/Flightgear aeronautical data So 250 kts x 10 + 500 ft = 3000 ft above ground. On instrument approaches you need to be stable at 1000 ft so add 500 ft. Usually turboprops have no problem decelerating during descent, speed x 10 gives you the height above ground to start deceleration, you will reach final approach speed at 500 ft. When planning on using speed brakes, divide the above by 2.Īssuming you are flying 250 kts below 10.000 ft and you really don’t want to be flying any faster than 180 kts at the FAF/FAP → 250 - 180 = 70, which means you should start deceleration no later than 7 nm prior FAF/FAP when planning to decelerate in level flight or double that (14 nm) when performing a continuous descent.
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