The Learjet 28 is an American eight-to-ten-seat (two crew and six to eight passengers), twin-engine, high-speed
business jet
A business jet, private jet, or bizjet is a jet aircraft designed for transporting small groups of people. Business jets may be adapted for other roles, such as the evacuation of casualties or express parcel deliveries, and some are used by pub ...
, intended to be the successor to the
Learjet 25
The Learjet 25 is an American ten-seat (two crew and eight passengers), twin-engine, high-speed business jet aircraft manufactured by Learjet. It is a stretched version of the Learjet 24.
Development
The first Model 25 flew on August 12, 196 ...
. 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.
[A history of the LJ23-LJ29 series on Airliners.net](_blank)
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History
The first flight of the Learjet 28 took place on August 24, 1977.Learjet 25
The Learjet 25 is an American ten-seat (two crew and eight passengers), twin-engine, high-speed business jet aircraft manufactured by Learjet. It is a stretched version of the Learjet 24.
Development
The first Model 25 flew on August 12, 196 ...
, and received a completely new wing fitted with winglets which resulted in improved performance and fuel economy.Learjet 55
The Learjet 55 "Longhorn" is an American business jet manufactured by Learjet.
Development and design
The Learjet 50 series was first announced at the 1977 Paris air show with larger cabins than the existing Learjets. The series was to have thre ...
, and the Learjet 28 was originally planned to be a testbed for the wing, not a production type, but after the prototypes demonstrated excellent climb performance and the ability to operate at (the first business jet to do so), it was decided to offer the Learjet 28 and 29 as production aircraft.[Griffiths ''Air-Britain Aviation World'' Autumn 2022, p. 189.]
The Learjet 28/29 was the first production jet aircraft to utilize winglets (entering service in 1977).
Both models were commercially unsuccessful, showing reduced range compared to the Learjet 31, as the addition of winglets required the deletion of the earlier model's wingtip tanks, and they sold mainly to customers with a requirement for good altitude performance.[Taylor 1982, p. 367] Both types were subsequently replaced by the Learjet 31
The Learjet 31 is an American built twin-engined, high speed business jet. Manufactured by Learjet, a subsidiary of Bombardier Aerospace, as the successor to the Learjet 29, it has a capacity of eight passengers and two crew.
Design and develo ...
.
The first production aircraft was used by Neil Armstrong
Neil Alden Armstrong (August 5, 1930 – August 25, 2012) was an American astronaut and aeronautical engineer who became the first person to walk on the Moon in 1969. He was also a naval aviator, test pilot, and university professor.
...
to set five aerospace records.
Noise compliance
In 2013, the FAA modified 14 CFR part 91 rules to prohibit the operation of jets weighing 75,000 pounds or less that are not stage 3 noise compliant after December 31, 2015. The Learjet 28 is listed explicitly in Federal Registe
78 FR 39576
Any Learjet 28s that have not been modified by installing Stage 3 noise compliant engines or have not had "hushkits" installed for non-compliant engines will not be permitted to fly in the contiguous 48 states after December 31, 2015. ''14 CFR §91.883 Special flight authorizations for jet airplanes weighing 75,000 pounds or less'' – lists special flight authorizations that may be granted for operation after December 31, 2015.
Specifications (Learjet 28)
See also
References
;Notes
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External links
A history of the LJ23-LJ29 series on Airliners.net
{{Learjet
28 29
1970s United States business aircraft
Twinjets
Low-wing aircraft
T-tail aircraft
Aircraft first flown in 1977