Learjet 60
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| Learjet 60 | |
|---|---|
 Learjet 60 parked at Filton Airfield, Bristol, England. |
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| Type | Business jet |
| Manufacturer | Bombardier Aerospace |
| Maiden flight | June, 1991 |
| Introduced | January 1993 |
| Developed from | Learjet 55 |
The Learjet 60 is an American business jet aircraft manufactured by Bombardier Aerospace at Wichita, Kansas.
The Learjet 60 does not have the range for direct transoceanic flights from the United States, although it can cross the Atlantic from Newfoundland to the British Isles.
A new Learjet 60 costs around $13 million, although used aircraft can be purchased for around $7 million.
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[edit] Development
The Learjet 60 is an improved version of the Learjet 55, with a longer fuselage and more powerful engines. It first flew in June 1991 and received FAA certification in January 1993.[1]
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. They include 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 intension of the blending, the blend design was really driven by attaching the original Learjet Model 35 empennage onto the larger Learjet Model 60 fuselage. An all new E/B (Emergency/Baggage) door was added to the right-hand side of the fuselage just at the leading edge of the wing.
The final aerodynamic improvement to the Model 60 was 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 Learjet Model 45 winglet blend design took into account the lessons learned from the Model 60 and the ogive was not necessary.
The single ventral fin was replaced with two ventral fins that Learjet called “Delta Fins”.
Production of the Learjet 60 ended in 1997 after 314 aircraft had been built.
[edit] Learjet 60XR
The company launched a new variant in 2005 designated the Learjet 60XR and following certfication in 2005 deliveries started in 2007. The new 60XR has an upgraded cabin, new avionics and other improvements
[edit] Operators
[edit] Government
Macedonia - 1 Learjet 60 delivered in April 2005 to replace the lost King Air 200. Used by the Government for VIP transport.[1]
[edit] Specifications (Learjet 60)
General characteristics
- Crew: 2
- Capacity: 8 to 10 passengers
- Length: 58 ft 7 in (17.88 m)
- Wingspan: 43 ft 9 in (13.34 m)
- Height: 14 ft 6 in (4.44 m)
- Wing area: 264.8 ft² (24.6 m²)
- Empty weight: 14,640 lb (6,641 kg)
- Max takeoff weight: 23,500 lb (10,660 kg)
- Powerplant: 2× Pratt & Whitney 305A , 4,600 lbf (20.46 kN) each
Performance
- Maximum speed: 534 mph (464 knots, 859 km/h)
- Cruise speed: 486 mph (447 knots, 782 km/h)
- Range: 2,876 mi (2,499 nm, 4,628 km)
- Service ceiling 51,000 ft (15,545 m)
- Rate of climb: 2,158 ft/min (11.0 m/s)
- Wing loading: 88.7 lb/ft² (433 kg/m²)
- Thrust/weight: 0.39
[edit] See also
Comparable aircraft Cessna Citation VII - Gulfstream G100 - Hawker 800XP
[edit] References
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