Learjet 28

Infobox Aircraft
name = Learjet 28/29

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caption = The Learjet 28/29 was the first production jet aircraft to utilize winglets (entering service in 1977).
type = Business jet
manufacturer = Learjet
designer =
first flight = August 24, 1977
introduced =
retired =
status =
primary user = Private
more users = Military
NASA
produced =
number built =
unit cost = The Learjet 28 is an American eight to ten seat (two crew and six to eight passengers), twin-engined, high speed business jet, intended to be the successor to the Learjet 25. The Learjet 29 is identical except for the addition of a long-range fuel tank, resulting in the reduction of the capacity to six (two crew and four passengers). Both were manufactured by Learjet, and were marketed under the Longhorn name. [http://www.airliners.net/info/stats.main?id=264 A history of the LJ23-LJ29 series on Airliners.net] ]

History

The first flight of the Learjet 28 took place on August 24, 1977. FAA certification was awarded to both models on July 29, 1979. [http://www.wingsoverkansas.com/history/article.asp?id=199 Learjet company timeline] ]

The Learjet 28/29 was based on the LJ25, and received a completely new wing fitted with winglets which resulted in improved performance and fuel economy. Both models were commercially unsuccessful due to their outdated engines (noise and fuel consumption being too high).

Only five production LearJet 28s and four LearJet 29s were constructed before both types were replaced by the Learjet 35, with production ceasing in 1982.

pecifications

*Span: 13.35 m
*Length: 14.50 m
*Height: 3.73 m
*Max one. Takeoff weight: 6805 kg
*Maximum speed: 883 km/h
*Optimal cruising speed: 756 km/h
*Service ceiling: 15545 m
*Range: 2660 km
*Passengers: max 10
*Engines: 2× General Electric CJ610-8A to ever 13.1 kN

References

External links

* [http://www.airwar.ru/enc_e/aliner/ljet28.html Specs of LJ28]
* [http://www.airwar.ru/enc_e/aliner/ljet29.html Specs of LJ29]
* [http://www.airliners.net/info/stats.main?id=264 A history of the LJ23-LJ29 series on Airliners.net]

ee also

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