Glossary of Terms
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Factor of safety
Factor of safety. A design factor used to provide for the possibility of loads greater than those assumed, and for uncertainties
Final approach fix or point. That fix or point of an instrument approach procedure where the final approach segment
Fan marker beacon
Fan marker beacon. A type of radio beacon, the emissions of which radiate in a vertical fan-shaped pattern
FANS 1/A - Future Air Navigation System 1 or A. (Respectively, Boeing and Airbus Proprietary Air-Ground ATC Data Link Communications Systems)
Farad (F). The capacitance of a capacitor between the plates of which there appears a difference of potential of 1 volt when
Final approach and take-off area (FATO). A defined area over which the final phase of the approach manoeuvre to hover or
FBL - Used in meteorology meaning "light" as in precipitation or icing.
FDE - Fault Detection and Exclusion
‘Feathered Pitch’ means the pitch setting, specified in the appropriate propeller manual, which in flight with the engine stopped, gives approximately the minimum drag, and corresponds with a windmilling torque of approximately zero.