V4I1F4F4S1
14 points
VIFFS is validvalid
VIFF, to change direction abruptly of a vertical take-off aircraft [v]
VIFF, to change direction abruptly of a VTOL aircraft [v]
VIFF, to change direction abruptly of a vertical take-off aircraft [v]
VIFF, to change direction abruptly of a VTOL aircraft [v]