Cessna Citation X

The Cessna Citation X is a medium-sized business jet airplane designed to fly at high subsonic speeds. It is the fastest business jet available, and the third fastest civil airplane that has ever flown, after the Concorde and Tupolev Tu-144.

Overview

The Citation X is operated by two crew and carries from eight to twelve passengers. Some major characteristics are summarized below.

Wingspan - 63.6 ft (19.4 m)
Length - 72.3 ft (22.0 m)
Height - 19.0 ft (5.8 m)
Aspect Ratio - 7.8
Wing Area - 527 ft² (50 m²)
Tailplane Span - 26 ft (7.9 m)
Dihedral - 2°
Wing Sweep - 37°

The aircraft incorporates a number of innovative design features. One attribute that is often first noticed is the large diameter of the engine intakes. This feature, related to the high bypass ratio turbofan, reduces the noise from the engines and improves fuel efficiency. Another obvious characteristic is the highly swept wing, in order to increase the critical href= Mach number and therefore the top speed. The Citation X has 37 degrees of sweepback at the quarter chord, more than any other business jet and, among civil aircraft, second only to the Boeing 747's 37.5 degrees. The horizontal and vertical stabilizers are also highly swept and are arranged in a T-tail configuration.

Airframe

A significant amount of effort throughout the design process was directed towards reducing the Citation X's total drag. The resulting design includes an area-ruled fuselage for efficient transonic flight, and the aforementioned highly swept href= supercritical wing. Unlike those on previous Citation aircraft, the Citation X's wing is slung below the fuselage rather than passing through it. This allows increased volume in the fuselage, a one-piece wing, and simplified wing-fuselage connections.

Engines

The Citation X is powered by two Rolls-Royce/Allison AE3007C1 turbofan engines, each with a thrust of 6700 lbf (30 kN), pod-mounted on the sides of the rear fuselage. It is the first Cessna aircraft to be powered by a Rolls-Royce engine. The engine has solid titanium blades and a three-stage low-pressure turbine. The engine's fan has a 5 to 1 bypass ratio for improved fuel efficiency and low acoustic signature.

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