The Learjet 45XR is an upgraded version introduced in June, 2004, offering higher takeoff weights, faster cruise speeds and faster time-to-climb rates as compared to the LJ45. The increases are due to the upgrading of the engines to the TFE731-20BR configuration. LJ45 owners can upgrade their aircraft through the incorporation of several service bulletins.

In size, the LJ45 and LJ45XR fit between the smaller Learjet 31 and Learjet 40 and the larger Learjet 60 in the Lear product line. De Havilland Canada builds the LJ45s wings, and Bombardier subsidiary Short Brothers of Northern Ireland builds the fuselage and empennage.

The Learjet 45 is also one of the main airplanes featured in the Microsoft Flight Simulator franchise.

General characteristics

• Crew: 2
• Capacity: 9 passengers which includes one on the lavatory which is certified as a seat
• Length: 57 ft 6 in (17.68 m)
• Wingspan: 47 ft 10 in (14.57 m)
• Height: 14 ft 1 in (4.30 m)
• Wing area: 311.6 ft² (29.0 m²)
• Empty weight: 13695 lb (6212 kg)
• Max takeoff weight: 21,500 lb (9750 kg)
• Powerplant: 2× Honeywell TFE731-20 , 3500 lb (15.56 kN) each

Performance

• Maximum speed: 464 kt (Mach 0.7)
• Cruise speed: 457 kt (525 mph)
• Range: 2120 nm (2440 mi)
• Service ceiling: 51000 ft (15545 m)