F19 or F-19 may refer to:
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F-19
F-19 is the designation for a hypothetical US fighter aircraft that has never been officially acknowledged, and has engendered much speculation that it might refer to a type of aircraft whose existence is still classified.
History
Since the uni ...
, a designation for a hypothetical United States fighter aircraft
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Faucett F-19
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The Faucett F-19 was a 1940s Peruvian eight-seat high-wing transport monoplane built by the airline Faucett Perú for its own use.
Development
To meet its own requirement for an eight-seat transport the airline's engineering departmen ...
, a 1940s Peruvian eight-seat transport monoplane
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Focke-Wulf F 19
The Focke-Wulf F 19 ''Ente'' (German: "Duck") was a German experimental "canard" aircraft in the late 1920s.
Design
The F 19 Ente was a high-wing monoplane with a canard layout and fixed tricycle undercarriage. The pilot sat in an open cockpi ...
, a German aircraft
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Fluorine-19
Fluorine (9F) has 18 known isotopes ranging from to (with the exception of ) and two isomers ( and ). Only fluorine-19 is stable and naturally occurring in more than trace quantities; therefore, fluorine is a monoisotopic and mononuclidic eleme ...
(F-19 or
19F), an isotope of fluorine
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