I first encountered the X modifier in my youth. As an aviation enthusiast I was introduced to the radical X-3 Stiletto. The X-3 Stiletto was an experimental jet aircraft designed and manufactured by the Douglas Aircraft Company for the U.S. National Advisory Committee for Aeronautics (NACA). The NACA was the precursor of the National Aeronautics and Space Administration (NASA).
The X-3 looks like a personification of the beaked-nose white spy from Mad magazine’s Spy vs. Spy, with its a slender fuselage, a long tapered nose, and ultra-modern white-on-white paint scheme. The X-3 was part of a series of experimental United States airplanes, helicopters and rockets used to test and evaluate new technologies and aerodynamic concepts, referred to as “X-Planes”:
The majority of X-Plane testing has occurred at Edwards Air Force Base. Some of the X-planes have been well publicized, while others, such as the X-16, have been developed in secrecy. The first, the Bell X-1, became well known after it became, in 1947, the first aircraft to break the sound barrier in level flight. Later X-planes supported important research in a multitude of aerodynamic and technical fields, but only the North American X-15 rocket plane of the early 1960s achieved comparable fame to that of the X-1. X-planes 7 through 12 were actually missiles(used to test new types of engines), and some other vehicles were un-piloted (some were remotely flown, some were full-on drones). (Wikipedia: X-Plane)
X has many other uses in addition to designating an experimental aircraft: it is a common variable for unknown or changing concepts in mathematics; in astronomy, X stands for a comet of unknown origin; X is a symbol on a treasure map to mark the spot where the treasure is buried; in bowling X signifies a strike; and X is a placeholder for the legal signature of an illiterate person. On a more romantic note, Xs symbolize the kisses paired with the Os of hugs in warmhearted salutations.
Besides these common uses, the X modifier is often deployed as branding shorthand to differentiate some person, product, or service as being advanced, audacious, bleeding-edge, bold, contemporary, daring, earth-shattering, forward-looking, fresh, game-changing, genuine, ground-breaking, gutsy, innovative, modern, newfangled, novel, original, pioneering, rejuvenated, sophisticated or unique. The use of X is everywhere, and seems to be the gift the keeps on giving. So I decided to look into the origins of the X that so often marks the spot. Here is a brief summary of my findings.
A Brief History of X (1895 -2014)
1895 | X-Rays: Physicist Wilhelm Röntgen discovers X-rays. Röntgen named it X-radiation to signify an unknown type of radiation. [Read more…] about A Brief History of X (1895-2014)