Learjet 28

sspan class="mw-headline" id="History">History[edit]

Learjet 28/29 was the first serial airplane to use a winglet (quote required) (Commissioning 1977). Learjet 28/29 was built on Learjet 25 and got a complete new winglet wings, resulting in better power and lower mileage[ 1] Both versions were not economically successful due to their obsolete engines[citation required] (noise and mileage were too high).

The FAA amended the provisions of 14 CFR Part 91 in 2013 to ban the operations of 75,000 pound or less aircraft that are not sound after 31 December 2015. Learjet 28 is specifically entered in the Federal Register 78 FR 39576. Learjet 27s which have not been altered by the installation of noise-compliant level 3 power -units or for which no noncompliant power "hushkits" have been fitted shall not be allowed to enter adjacent 48 States after 31 December 2015.

CFR 91.883 Specific permits to fly for jets of 75,000 lbs or less - List of specific permits to fly that may be issued for operations after 31 December 2015.

28 Learjet specifications, cabin dimensions, speeds, etc.

The Learjet 28 was developed in 1977 by Learjet 25 manufacturer and designer following the Learjet 25's great popularity. It was the first serial winglet plane to use this enhanced variant of the older series. Aerofoil designs resulted in enhanced power and reduced consumption, but the obsolete powerplant made the plane economically inoperative.

Just 5 planes were built before 1982 saw the end of operations and the replacement of the Learjet 31.

Class ical Learjet 28 Archive

Prof. Neil A. Armstrong of the University of Cincinnati College of Engineering, member of the Board of Directors of the Gates Learjet Corporation, former US Navy combat engineer, NACA/NASA researchilot, Gemini and Apollo Astronaut, and the first man to step on the moon, presented five classes record of the Fédération Aéronautique Internationale (FAI) and the National Aeronautics Association to ascend to a height and height while they were the Learjet 28 model, series number 28- Learjet 28.

Armstrong, with Learjet Programme test pilots Peter Reynolds as co-pilot and Don Berliner as aircraft on board, flown the Learjet 28 to 15,000 metres (49,212,598 feet) in 12 min and 27 seconds on 19 February in Kittyhawk, North Carolina. Armstrong on the same date, during a plane ride from Wichita, Kansas, to Elizabeth City, North Caroline, Armstrong flown the Learjet to 15,584.6 metres (51,130,577 feet), establishing height and endurance record levels in level-flying.

On the following morning, February 20, 1979, Armstrong flew from Elizabeth City, North Carolina to Florence, Kentucky, and reinstated height and steady height in level-flying horizontal, in another category, bringing the Learjet to 15,585 metres (51,131.89 feet). Learjet 28 was a design of the twin-jet Learjet 25 commercial aircraft.

On August 24, 1977, the aircraft was first flown and was certified by the Federal Aviation Administration on July 29, 1979. Learjet 28 is 47 ft, 7 inch (14,503 meters) long with a span of 43 ft, 10 inch (13,360 meters) and a total altitude of 12 ft, 3 inch (3,734 meters).

Its unladen tonnage is 8,267 lbs (3,749.9 kilograms) and its total Gross tonnage is 15,000 lbs (6,803.9 kilograms). Learjet 28 is propelled by two General Electric CJ610-8A turbines, each generating 2,850 lbs of sea-level propulsion and 2,960 lbs of launch propulsion (five-minute limit). It has a cruising rate of 756.4 kilometres per hour at 15,544.8 metres (51,000 feet) (470 mph).

Servicing ceilings are 15,544.8 metres (51,000 feet), which is a maximum height. It was restricted by its older turbo jet engine and only five Learjet 28 were made. First Learjet 28, series number 28-001, has been re-registered several time. One of America's most popular protagonists, Neil Alden Armstrong died on August 25, 2012.