Learjet 23

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Learjet 23
Learjet 23 der NASA.jpg
NASA Learjet 23
Role Business jet
Manufacturer Learjet
Designer William Powell Lear, based on a design by Dr.eng. Hans-Luzius Studer
First flight 7 October 1963
Introduction October 13, 1964
Status Active
Produced 1964-1966[1]
Number built 101[1]

The Learjet 23 is an American built six-to-eight-seat (two crew and four to six passengers) twinjet, high-speed business jet manufactured by Learjet. Introduced in 1964, it was Learjet's first model and created a new market for fast and efficient business aircraft. Production ended in 1966 after 101 aircraft had been delivered.

History[edit]

Recognizing the potential of the FFA P-16, William (Bill) Powell Lear, Sr. established Swiss American Aviation Corporation (SAAC) to produce a passenger version: the SAAC-23 Execujet. The company moved to Wichita, Kansas and renamed the Lear Jet Corporation. Production began on the first Model 23 Learjet on February 7, 1962. The first flight took place on 7 October 1963 with test pilots Hank Beaird and Bob Hagen.[2] Although the prototype crashed in June 1964 the Learjet 23 was awarded a type certificate by the Federal Aviation Administration on 31 July 1964. On October 13, 1964, the first production aircraft was delivered.

Production ended in 1966 after one hundred and one aircraft had been delivered. In 1998, thirty nine Model 23s were estimated to remain in use. Twenty seven are known to have been lost or damaged beyond repair through accidents, the most recent being in 2008.[3]

Noise compliance[edit]

In 2013, the FAA modified the CFR part 91 rules to prohibit the operation of jets weighing 75,000 pounds or less that are not stage 3 noise compliant beyond December 31, 2015, with the Learjet 23 listed in the Federal Register 78 FR 39576. This meant that any Learjet 23's without modified Stage 3 noise-compliant engines - or an approved hushkit - were no longer permitted to fly in the contiguous 48 states after that date. The ruling noted that appropriate hushkits were not currently available for the Learjet 23.

Aircraft on display[edit]

Operators[edit]

 United States

Specifications[edit]

Data from Jane's All The World's Aircraft 1965–66[13]

General characteristics

  • Crew: Two pilots
  • Capacity: 6 passengers
  • Length: 43 ft 3 in (13.18 m)
  • Wingspan: 35 ft 7 in (10.84 m)
  • Height: 12 ft 7 in (3.84 m)
  • Wing area: 231.2 sq ft (21.48 m2)
  • Empty weight: 6,150 lb (2,790 kg)
  • Max takeoff weight: 12,499 lb (5,669 kg)
  • Powerplant: 2 × General Electric CJ610-4 turbojet engines, 2,850 lbf (12.7 kN) thrust each

Performance

  • Maximum speed: 561 mph (903 km/h; 487 kn) at 24,000 ft (7,300 m)
  • Maximum speed: Mach 0.82
  • Cruise speed: 518 mph (834 km/h; 450 kn) at 40,000 ft (12,000 m)
  • Stall speed: 104 mph (167 km/h; 90 kn) wheels and flaps down
  • Range: 1,830 mi (1,590 nmi; 2,945 km) max fuel at 485 mph (781 km/h; 421 kn) and 40,000 ft (12,000 m)
  • Service ceiling: 45,000 ft (14,000 m)
  • Rate of climb: 6,900 ft/min (35 m/s)

See also[edit]

Related lists

References[edit]

  1. ^ a b Murdo Morrison (12 Oct 2018). "NBAA: Business jet designs that changed the industry". FlightGlobal.
  2. ^ Flying Magazine: 38. December 1993. Missing or empty |title= (help)
  3. ^ Aviation Safety Network: Learjet 23
  4. ^ "Lear Jet 23". Smithsonian National Air and Space Museum. Smithsonian Institution. Retrieved 8 November 2016.
  5. ^ a b "Learjet 23/24 production list". rzjets. rzjets.net. Retrieved 8 November 2016.
  6. ^ "Learjet Model 23". Kansas Aviation Museum. Retrieved 8 November 2016.
  7. ^ Mathews, Kay (4 February 2011). "Since 1986 aviation history flies high at the Arkansas Air Museum". Digital Journal. digitaljournal.com. Retrieved 8 November 2016.
  8. ^ "Aircraft N23BY Data". Airport-Data.com. Airport-Data.com. Retrieved 8 November 2016.
  9. ^ "LEARJET MODEL 23". Pima Air & Space Museum. Pimaair.org. Retrieved 8 November 2016.
  10. ^ "Learjet 23". The Museum of Flight. The Museum Of Flight. Retrieved 8 November 2016.
  11. ^ "Airframe Dossier - Swiss American Aviation CorporationLearjet, c/n 23-068, c/r N73CE". Aerial Visuals. AerialVisuals.ca. Retrieved 8 November 2016.
  12. ^ "Airframe Dossier - Swiss American Aviation Corporation 23 Lear Jet, c/n 23-083, c/r N824LJ". Aerial Visuals. AerialVisuals.ca. Retrieved 30 July 2018.
  13. ^ Talyor 1965, pp. 252–253.

External links[edit]