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The Learjet 55 and its follow-on successor, the Learjet 60, are the largest members of the Learjet family, and date back to development work undertaken in the late 1970s. In designing the 55, Learjet (or Gates Learjet as the company was then known as) took the wing of the earlier Longhorn 28/29 series and married it to an all new larger 10 seat fuselage. The original Model 55 Longhorn prototype first flew on November 15 1979. The first production aircraft meanwhile flew on August 11 1980, with the first delivered in late April 1981 (after FAA certification was granted in March that year).
Development of the 55 led to a number of sub variants, including the 55B which introduced a digital flight-deck, modified wings, improved interior, and most importantly, the previous optional higher takeoff weights (21,500 lbs) becoming standard. The 55C introduced `Delta Fins' which gave a number of performance and handling advantages, the 55C/ER is an extended range version with additional fuel in the tail cone (the additional tank can be retrofitted to earlier aircraft), while the 5C/LR
introduced more fuel capacity. |
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| Seating (normal) |
7 |
Max Takeoff (lbs) |
21,500 |
| Seating (maximum) |
- |
Certified Ceiling (ft) |
51,000 |
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| Engines |
2 Hon TFE731-3A-2B |
To (Sealevel, ISA Temp) (ft) |
5,600 |
| Output lbs ea. Flat Rating |
3,700 |
Landing Distance (ft) |
2,800 |
| Maximum Mach No. |
0.81 |
Max Range (fuel) (nm) |
1,922 |
| High Speed Cruise (Kts) |
458 |
Max Range (payload) (nm) |
1,922 |
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| Flight Time 300nm |
0 + 45 |
Flight Time 1000nm |
2 + 25 |
| Flight Time 600nm |
1 + 28 |
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| External |
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Internal |
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| Length (ft) |
55.10 |
Length (ft) |
13.70 |
| Height (ft) |
14.70 |
Height (ft) |
5.70 |
| Span (ft) |
43.80 |
Width: Max floor (ft) |
5.90 |
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