X-1 - Definition
X1
may refer to:
the
Bell X-1
, the first
aircraft
to exceed the speed of sound
the
X-1 Submarine
, the
United States Navy
's only midget
submarine
the
X1
spaceflight, the second
Ansari X Prize
flight, also known as
SpaceShipOne flight 16P
This is a
disambiguation
page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
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