Learjet 25

Infobox Aircraft
name = Learjet 25

---

caption = NASA Learjet 25
type = Business jet
manufacturer = Learjet
designer =
first flight = August 12, 1966
introduced = November 1967
retired =
status =
primary user = Private
more users = Military
NASA
produced =
number built =
unit cost =

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.

Development

The first Model 25 flew on August 12, 1966, and the first delivery was in November 1967. [http://www.wingsoverkansas.com/history/article.asp?id=199 Learjet company timeline] ]

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.

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.

In 1974 the Peruvian Air Force purchased two 25Bs with a belly pod that contained an aerial survey camera.

Variants

The ICAO designator as used in flight plans for all Learjet 25 models is LJ25.

25A

FAA certified on October 10, 1967.

25B

FAA certified on September 4, 1970.

25C

FAA certified on September 4, 1970.

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.

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.

pecifications (Learjet 25B)

aircraft specifications

plane or copter?=plane
jet or prop?=jet
crew=Two pilots
capacity=8 passengers
length main=47 ft 7 in
length alt=14.5 m
span main=35 ft 7 in
span alt=10.84 m
height main=12 ft 3
height alt=3.73 m
area main=231.77 ft²
area alt=21.53 m²
empty weight main= 8,223 lb
empty weight alt=3,730 kg
loaded weight main=7,755 lb
loaded weight alt=3,517 kg
max takeoff weight main=15,500 lb
max takeoff weight alt=6,803 kg
more general=
engine (jet)=General Electric CJ610-6 or CJ610-8
type of jet=turbojets
number of jets=2
thrust main=
thrust alt=
max speed main=545 mph
max speed alt=473 knots, 877 km/h
max speed more=at 41,000 ft (12,500 m)
range alt=1,435 nm, 2,853 km 3,5 hours at high speed cruise
range more=with seven passengers, maximum fuel, and 45 minute reserve
ceiling main=45,000 ft
ceiling alt=13,720 m
climb rate main=6,050 ft/min
climb rate alt=30.7 m/s
loading main=64.7 lb/ft²
loading alt=315.9 kg/m²
thrust/weight=

References

*"Jane's All the World's Aircraft"

External links

* [http://www.airliners.net/info/stats.main?id=264 A history of the LJ23-LJ29 series on Airliners.net]
* [http://aviation-safety.net/database/dblist.php?Type=LJ-25 Listing of LJ25 accidents in the ASN Aviation Safety Database]

ee also

*The 1983 Scotland Learjet 25 crash

Related content

aircontent
related=* Rocketplane XP — a heavily modified LearJet 25 reconfigured as a suborbital spaceplane by Rocketplane Limited, Inc.

similar aircraft=
sequence=
LJ23 - LJ24 - LJ25 - LJ28 - LJ29
lists=
List of aircraftLearjet