fly-by-light
n.β Β«Traditional aeroplane controls still maintain a mechanical linkage directly from the pilotβs hands and feet to the the various surfaces used to manoeuvre the aircraft in flight. As larger aircraft and power-assisted controls have developed, in many cases the direct link no longer existsβleading to so-called “fly-by-wire” control systems, nowadays commonplace. In turn, as aircraft wiring has become more complex, use is being made of fibre-optic cables to carry more information around the airframe, which is sometimes called “fly-by-light.”Β» ββWireless links to be trialled in Gulfstream flight controls” The Register (United Kingdom) May 27, 2008. (source: Double-Tongued Dictionary)