Learjet 25
From Wikipedia, the free encyclopedia
| Learjet 25 | |
|---|---|
 NASA Learjet 25 |
|
| Type | Business jet |
| Manufacturer | Learjet |
| Maiden flight | August 12, 1966 |
| Introduced | November 1967 |
| Primary users | Private Military NASA |
The Learjet 25 is an American ten seat (two crew and eight passengers) twin-engined, high speed business jet aircraft. Manufactured by Learjet as a stretched version of the Learjet 24.
Contents |
[edit] Development
The first Model 25 flew on August 12, 1966, and the first delivery was in November 1967.[1]
The Learjet 25 is similar to the Model 24 but is 1.27 m (4 ft 2 in) longer, allowing for three additional passengers. In 1970 the Learjet 25B was produced along with the Learjet 25C in the same year.
The aircraft has two General Electric CJ610-6 (or CJ610-8) turbojet engines. Baggage is stowed in a compartment at the rear of the cabin.
[edit] Operations
The cabin interior can be converted to several different configurations to allow for cargo and medevacs. Due to the ease of converting the cabin the Learjet 25 has found a niche as a medevac aircraft. This is achieved by removing the starboard seating to allow for a stretcher, mounting oxygen bottles and Intravenous drip equipment. The two flight crew are then supplemented by either a doctor or flight nurse or both. The Model 25C also has an optional two bed sleeping compartment.
Despite being used at lower altitudes and equipped with small landing gear, the Learjet can land on gravel runways if it is fitted with a special "gravel kit". It is possible for gravel from an improperly packed gravel runway to be sucked into the engines causing "Foreign object damage", thus the need for the kit.
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In 1974 the Peruvian Air Force purchased two 25Bs with a belly pod that contained an aerial survey camera.
[edit] Variants
The ICAO designator as used in flight plans for all Learjet 25 models is LJ25.
[edit] 25A
FAA certified on October 10, 1967.
[edit] 25B
FAA certified on September 4, 1970.
[edit] 25C
FAA certified on September 4, 1970.
[edit] 26
Unofficial designation of a Model 25 which was equipped with Garret AiResearch TFE731-2 turbofan engines for a developmental flight test program. The aircraft, N26GL, first flew with the engines on May 19, 1971. The success of the flights led to the development of the Model 35.[1]
[edit] 25G
Introduced September 23, 1980. During a series of demonstration flights lasting from June 9 to 18, 1982, the 25G broke a number of long-distance speed and fuel consumption records.[1]
[edit] Specifications (Learjet 25B)
General characteristics
- Crew: Two pilots
- Capacity: 8 passengers
- Length: 47 ft 7 in (14.5 m)
- Wingspan: 35 ft 7 in (10.84 m)
- Height: 12 ft 3 (3.73 m)
- Wing area: 231.77 ft² (21.53 m²)
- Empty weight: 8,223 lb (3,730 kg)
- Loaded weight: 7,755 lb (3,517 kg)
- Max takeoff weight: 15,500 lb (6,803 kg)
- Powerplant: 2× General Electric CJ610-6 or CJ610-8 turbojets
Performance
- Maximum speed: 545 mph (473 knots, 877 km/h) at 41,000 ft (12,500 m)
- Range: 1,770 mi (1,540 nm, 2,853 km) with seven passengers, maximum fuel, and 45 minute reserve
- Service ceiling 45,000 ft (13,720 m)
- Rate of climb: 6,050 ft/min (30.7 m/s)
- Wing loading: 64.7 lb/ft² (315.9 kg/m²)
[edit] References
- Jane's All the World's Aircraft
[edit] External links
- A history of the LJ23-LJ29 series on Airliners.net
- Listing of LJ25 accidents in the ASN Aviation Safety Database
[edit] See also
[edit] Related content
Related development
- Rocketplane XP — a heavily modified LearJet 25 reconfigured as a suborbital spaceplane by Rocketplane Limited, Inc.
Related lists
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