The Learjet 45 (LJ45) aircraft is a super-light sized business jet aircraft produced by Bombardier Aerospace.

New models of private jets come out every year, but it’s only ever so often that a jet is released that is truly innovative. The medium-range Learjet 45, replacing the 35, is one of the rare jets to seamlessly integrate new technology with a tested and successful older design. Its speed and economy are to be expected – being a Learjet – but its remaining features combine to create a high-quality private jet and the 45 even more so.


The development of the LJ45 was announced by Bombardier in September, 1992, and first flight of the prototype aircraft took place on October 7, 1995, the 32nd anniversary of the first flight of the Learjet 23. FAA certification was delayed, and finally granted in September 1997, with the first customer aircraft subsequently delivered in January, 1998. The cockpit is equipped with a four-screen Honeywell Primus 1000 EFIS avionics system. The aircraft is powered by two DEEC-controlledHoneywell TFE731-20 engines, a version developed specifically for this airframe. An internal APU provides ground power.


The 45 is of classic Learjet design and layout. However a number of key design changes were made early into the 45’s design life including a larger fin and rudder, extended engine pylons, smaller delta fins, full span elevators, and single piece flaps.

Larger than the Learjet 31 and smaller than the 60, Learjet states that the 45’s 1.50m (4.9ft) high and 1.55m (5.1ft) wide cabin will provide more head and shoulder room than any other aircraft in its class. The cabin is designed to accommodate double club seating, a galley and a full width aft rest room, while eight windows line each side of the cabin.

The flightdeck features a four screen (two primary flight displays and two multifunction displays) Honeywell Primus 1000 integrated avionics suite, while an APU is standard.

The 20 FADEC equipped version of the proven AlliedSignal TFE731 engine was developed in cooperation with Learjet for the 45 and incorporates 60 design changes to increase fuel economy and reduce operating and maintenance costs.

Aircraft Data

  • ICAO Code: LJ45
  • Manufacture: Bombardier Aerospace
  • Class: Business Jet
  • Model Types: 45. 45 XR
  • Crew: 2
  • Passengers: 9
  • Engines: Two 15.7kN (3500lb) AlliedSignal TFE73120 turbofans.
  • Max Speed: 857km/h (463kt)
  • MTOW: 21,500 lb (9,752 kg)
  • Max Range: 1,968 mi (1,710 nmi, 3,167 km) (4 passengers)
  • Max Flight Level: 51,000 ft (15,545 m)

RocketRoute added advanced performance data for the following profiles:

  • Cruise (Max speed cruise, Long range cruise, Normal cruise, cruise Constant mach, cruise High Speed Cruise,  cruise Long Range Cruise, cruise SE Long Range Cruise)
  • Climb (High speed climb, Normal climb)
  • Descent (Descent high speed, Descent Normal)
  • Holding (Anti-Ice On, Anti-Ice Off, holding AIOff Holding)
  • Mass & Balance
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