1. Development
    Learjet 60XR 

2. Operators
    Civilian  Military and government 

3. Incidents and accidents

4. Specifications

5. See also

6. References

7. Further reading

8. External links

The Learjet 60 is a mid-size cabin, medium-range business jet aircraft manufactured by Bombardier Aerospace in Wichita, Kansas. Powered by two Pratt & Whitney Canada PW305A engines, it has a range (with 4 passengers and 2 crew) of {{convert|2405|nmi|km}} with NBAA {{convert|100|nmi|km|abbr=on}} reserves, ISA.^[3] In July 2012 Bombardier Aerospace announced a temporary "production pause" of the latest variant Learjet 60XR to begin in the fourth quarter of 2012.^[4][5]

Development

The Learjet 60 is an improved version of the Learjet 55, with a longer fuselage and more powerful turbofan engines. It first flew on 10 October 1990 and received FAA certification in January 1993.^[6]

The modifications that converted the Learjet Model 55 into a Model 60 resulted from an aerodynamics improvement program and a need to increase the capacity of the Learjet product line. Several of these modifications were a first for Learjet, including an all-new inboard wing cuff added to the inboard sections of the “Longhorn” wing and an all-new wing-to-body fairing. By increasing the wing chord and the leading edge droop, the wing cuff improved handling during approach and landing, while the wing-to-body fairing reduced the interference drag between the wing and the fuselage. Since the engines were new for this aircraft, a new engine pylon had to be designed.

The lines of the cockpit have not changed but the fuselage was lengthened. In addition, the blend between the fuselage and the empennage was all new. While it appears as if area ruling was the intention of the blending, the blend design was really driven by attaching the original Learjet Model 35 empennage onto the larger Learjet Model 60 fuselage.

The final aerodynamic improvements to the Model 60 included the creation of the distinctive "ogive" winglet trailing edge. This lengthening of the chord near the interface of the winglet and the wing improved the interaction of the wing’s pressure spike with the winglet’s pressure spike. The result was a significant lowering of the drag in this area and a significant improvement of the wing's efficiency. On the prior “Longhorn” wing the interference between the winglet and the wing nearly canceled the effects of the winglet. The single ventral fin was also replaced with two ventral fins that Learjet called "Delta Fins" to improve stall characteristics and promote aerodynamic stability.

The Learjet 60 is notable for its time-to-climb performance, climbing to 41,000 feet (12,497 m) in 18.5 minutes at maximum weight. It also distinguished as the last legacy Learjet, using a variation of the wing that designer Bill Lear adapted from the Swiss military aircraft, the FFA P-16.{{citation needed|date=October 2014}} The next-generation Learjet was to be the Learjet 85 and was an all-new design by Bombardier Aerospace slated for delivery in 2013.^[7]

The Learjet 60, while a tremendous performer, also maintains the highest incident/accident rate in its class with most accidents occurring during landing. The use of the original Lear 23 gear and wheels (albeit it with an added brake rotor, bringing the total to 3 per wheel assembly) left the 60 (and the 55 before it) notably under-geared and under-braked. According to the NTSB most of these failures are caused by pilot-error as the aircraft can be unforgiving.^[8]

Production of the Learjet 60 ended in 2007 after 318 aircraft had been built. The Learjet 60XR was a variation with upgraded Proline 21 avionics and slight improvements to the cabin, with production from beginning at serial number 319Bombardier Aerospace.

By 2018, a Learjet 60 can be had for $1 million or less.^[9]

Learjet 60XR

Bombardier launched a new variant in 2005 designated the Learjet 60XR and following certification deliveries started in 2007.

Grandfathered on the 1966 Learjet 24 type certificate,^[10]

it was built until 2013.
|plane or copter?=plane
|jet or prop?=jet
|ref=Brassey's World Aircraft & Systems Directory 1999/2000^[20]
|crew=2
|capacity=8 passengers
|length main=58 ft 8 in
|length alt=17.881m
|span main=43 ft 9 in
|span alt=13.34 m
|height main=14 ft 8 in
|height alt=4.471 m
|area main=264.5 ft²
|area alt=24.57 m²
|empty weight main=14,640 lb
|empty weight alt=6,641 kg
|max takeoff weight main=23,500 lb
|max takeoff weight alt=10,660 kg
|more general=
|engine (jet)=Pratt & Whitney Canada PW305A
|type of jet=turbofan
|number of jets=2
|thrust main=4,600 lbf
|thrust alt=20.46 kN
|max speed main=522 mph
|max speed alt=453 knots, 839 km/h
|max speed more=(max cruise)
|cruise speed main=484 mph (Fast Cruise 536 mph)
|cruise speed alt=420 knots, 778 km/h, Mach 0.74
|cruise speed more=(long-range cruise)
|range main=2,773 mi
|range alt=2,409 nmi, 4,461 km
|ceiling main=51,000 ft
|ceiling alt=15,545 m
|climb rate main=4,500 ft/min
|climb rate alt=22.9 m/s
|loading main=
|loading alt=
|thrust/weight=
|more performance=
}}

See also

• Cessna Citation VII
• Gulfstream G150
• Hawker 800XP

References

Further reading

• Taylor, Michael J.H. Brassey's World Aircraft & Systems Directory 1999/2000. London:Brassey's, 1999. {{ISBN|1-85753-245-7}}.

External links

• Bombardier Learjet website

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