The Cessna Citation X is a midsize business jet manufactured by Cessna Aircraft Company, now part of Textron Aviation. It is one of the fastest civilian aircraft in the world, with a maximum speed of Mach 0.935, or approximately 700 mph. The aircraft has a range of up to 3,460 nautical miles and can carry up to 12 passengers.

The Citation X features a spacious cabin with a length of 23.9 feet, a width of 5.5 feet, and a height of 5.7 feet. The cabin can be configured with a variety of seating arrangements, including club seating, forward-facing seats, and a divan.

The aircraft also features a full galley, a private lavatory, and ample storage space.

The Citation X is powered by two Rolls-Royce AE 3007C1 turbofan engines, each producing 7,034 pounds of thrust.

The aircraft is equipped with an all-glass cockpit, featuring four large color displays, and is certified for single-pilot operation. The Citation X also includes advanced avionics, including a dual Flight Management System, Traffic Collision Avoidance System, and Weather Radar.

In 2010, Cessna introduced an upgraded version of the Citation X, known as the Citation X+ (pronounced "ten plus"). The Citation X+ features a redesigned wing and new engines, allowing for increased speed and range. The Citation X+ has a maximum speed of Mach 0.935, a range of up to 3,460 nautical miles, and can carry up to 12 passengers.

The aircraft also features a redesigned interior, with a new cabin management system and a variety of seating options.