单词	VIFF
释义	VIFF /vɪf / (also viff) Aeronautics, informal noun [mass noun] A technique used by a vertical take-off aircraft to change direction abruptly by altering the direction of thrust of the aircraft’s jet engines. verb [no object] (Of a vertical take-off aircraft) change direction by altering the direction of thrust of the engines: the VSTOL Harrier with its ability to viff... Harrier pilots do use the nozzles in air combat but I don't think to the extent viffing requires. Plaguewyrm 1 viffed to the right, underbelly thrusters bringing it in line to the Thunderbolt it was tailing. We use viffing, but it's more of a last-ditch than a standard manoeuvre. Origin 1970s: acronym from vectoring in forward flight.
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