Learjet 23

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title: "Learjet 23" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["learjet-aircraft", "1960s-united-states-business-aircraft", "twinjets", "aircraft-first-flown-in-1963", "low-wing-aircraft", "t-tail-aircraft", "aircraft-with-retractable-tricycle-landing-gear"] description: "1966 business jet aircraft" topic_path: "geography/united-states" source: "https://en.wikipedia.org/wiki/Learjet_23" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary 1966 business jet aircraft ::

::data[format=table title="Infobox aircraft"]

Field	Value
name	Learjet 23
image	File:Air Zoo Learjet II.JPG
type	Business jet
manufacturer	Learjet
designer	William Powell Lear, based on a design by Dr.eng. Hans-Luzius Studer
first_flight	7 October 1963
introduction	13 October 1964
status	Active
produced	1964–1966
number_built	101
developed_into	Learjet 24
::

|name = Learjet 23 |image = File:Air Zoo Learjet II.JPG |caption = |type = Business jet |manufacturer = Learjet |designer = William Powell Lear, based on a design by Dr.eng. Hans-Luzius Studer |first_flight = 7 October 1963 |introduction = 13 October 1964 |retired = |status = Active |primary_user = |more_users = |produced = 1964–1966 |number_built = 101 |unit cost = |developed_into = Learjet 24

The Learjet 23 (originally Lear Jet 23) is an American 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 small business aircraft. Production ended in 1966 after 101 aircraft had been delivered.

Development

Recognizing the potential of the FFA P-16 fighter jet, a Swiss single-engine ground-attack plane designed by Flug- und Fahrzeugwerke Altenrhein (FFA), William (Bill) Powell Lear, Sr. established Swiss American Aviation Corporation (SAAC) to produce a two-engined passenger version: the SAAC-23 Execujet. The company moved to Wichita, Kansas and was renamed Lear Jet Corporation. Production began on the first Model 23 Lear Jet on 7 February 1962. The first flight took place on 7 October 1963 with test pilots Hank Beaird and Bob Hagen. On 4 June 1964, the prototype crashed soon after takeoff, when the pilot inadvertently deployed the wing spoilers while demonstrating an engine failure on takeoff. Eventually determined to be pilot error, this mishap did not deter the Federal Aviation Agency (later the Federal Aviation Administration) from awarding the Lear Jet 23 its type certificate on 31 July 1964. On 13 October 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.

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 31 December 2015. The Learjet 23 is listed explicitly in Federal Register 78 FR 39576. Any Learjet 23s 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 31 December 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 31 December 2015.

Aircraft on display

::figure[src="https://upload.wikimedia.org/wikipedia/commons/e/e3/NASA_701_Learjet_23_chase_aircraft.jpg" caption="[[NASA]] Learjet 23 chase aircraft"] ::

• N802L – Model 23 on static display at the Udvar-Hazy Center of the National Air and Space Museum in Chantilly, Virginia.
• N505PF – Model 23 on static display at the Kansas Aviation Museum in Wichita, Kansas.
• N20EP – on display outside White Industries, Bates City, Missouri.
• N23BY – Model 23 on display at the Arkansas Air & Military Museum in Fayetteville, Arkansas. This airframe was flown by Bobby Younkin in air shows.
• N154AG – Model 23 on static display at the Museum of Flight in Seattle, Washington.
• N73CE – Model 23 on display at the Yanks Air Museum in Chino, California.
• N824LJ – Model 23 on static display at the Air Zoo in Portage, Michigan.
• N88B – Model 23 on static display at the Pima Air and Space Museum in Tucson, Arizona.
• N119BA – Model 23 on static display at the Valiant Air Command Museum in Titusville, Florida.

Operators

;

• NASA
• Executive Jet Aviation

Specifications

|ref=Jane's All The World's Aircraft 1965–66 |prime units?=imp |crew=Two pilots |capacity=6 passengers |length m=13.18 |span m=10.84 |height m=3.84 |wing area sqm=21.48 |airfoil= |empty weight lb=6,150 |gross weight kg= |gross weight lb= |gross weight note= |max takeoff weight lb=12,499 |fuel capacity= |more general= |eng1 number=2 |eng1 name=General Electric CJ610-4 |eng1 type=turbojet engines |eng1 lbf=2,850 |max speed mph=561 |max speed note=at 24000 ft |max speed mach=0.82 |cruise speed mph=518 |cruise speed note=at 40000 ft |stall speed mph=104 |stall speed note= wheels and flaps down |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range miles=1830 |range note=max fuel at 485 mph and 40000 ft |combat range km= |combat range miles= |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling ft=45000 |climb rate ftmin=6900 |time to altitude= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |fuel consumption kg/km= |fuel consumption lb/mi= |thrust/weight= |more performance= |avionics=

References

References

1. Murdo Morrison. (12 October 2018). "NBAA: Business jet designs that changed the industry". FlightGlobal.
2. (December 1993). "Lear Celebrates 30".
3. "ASN Aircraft Accident Learjet 23".
4. [http://aviation-safety.net/database/type/type.php?type=LJ-23 Aviation Safety Network: Learjet 23]
5. (18 March 2016). "Lear Jet 23". Smithsonian Institution.
6. "Learjet 23/24 production list". rzjets.net.
7. (11 June 2014). "Learjet Model 23".
8. "Bates City".
9. Mathews, Kay. (4 February 2011). "Since 1986 aviation history flies high at the Arkansas Air Museum". digitaljournal.com.
10. "Aircraft N23BY Data".
11. "Learjet 23".
12. "Airframe Dossier – Swiss American Aviation CorporationLearjet, c/n 23-068, c/r N73CE". AerialVisuals.ca.
13. "Airframe Dossier – Swiss American Aviation Corporation 23 Lear Jet, c/n 23-083, c/r N824LJ". AerialVisuals.ca.
14. "Learjet 23".
15. • [[John W. R. Taylor. Taylor, John W. R.]] ''Jane's All The World's Aircraft 1965–1966''. London:Sampson Low, Marston & Company, 1965. pp. 252–253.

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