Learjet 35/36

Learjet 35/36
bomberpilot · CC BY-SA 2.0 · source
Name	Learjet 35/36
Role	Business jet / light transport
Manufacturer	Bombardier Aerospace
First flight	1973
Introduced	1974
Produced	1973–1994
Number built	~1,200

Learjet 35/36 is a twin-engine, high-speed business jet developed in the early 1970s and produced through the 1980s and 1990s. Designed for long-range light transport, the type became notable for its use in corporate aviation, air ambulance operations, and military special-mission roles. It combined the low-drag aerodynamics associated with earlier short-haul designs and turbofan propulsion to achieve high cruise speeds and transcontinental range.

Development and Design

The type was developed by Bill Lear's company and later produced under Bombardier Aerospace lineage, building on lessons from the earlier Learjet 23 and Learjet 24. The design incorporated a slender fuselage derived from the Swissair era of small executive transports and adopted engines from Garrett AiResearch series turbofans similar to those used on contemporary Hawker Siddeley designs. The wing planform reflected research conducted at NASA facilities and incorporated high-aspect-ratio form factors informed by studies at Langley Research Center. Avionics suites evolved through integrations from suppliers such as Honeywell International and Garmin, influenced by certification requirements from authorities including the Federal Aviation Administration and Transport Canada. Structural materials and systems drew on manufacturing practices from Boeing subcontractors and tooling techniques developed in collaboration with Queen's University engineering programs.

Variants and Modifications

Production family variants included shorter-range and long-range versions, with modifications offered by aftermarket firms like FlightSafety International and StandardAero. Corporate retrofit programs were carried out by companies such as NetJets affiliate maintenance divisions and independent modification centers near hubs like Teterboro Airport and Van Nuys Airport. Special mission conversions were performed by contractors including E-Systems and Raytheon Technologies subsidiaries for customers such as United States Air Force and foreign air arms like the Royal Canadian Air Force and Royal Air Force. Interior refurbishments were completed by design houses associated with Sotheby's estate projects and luxury outfitting firms servicing clients from Fortune 500 companies.

Performance and Specifications

Typical performance figures placed cruise speeds at high-subsonic regimes comparable to peers flown by executives from General Motors and IBM, with maximum cruise around 430–450 knots and ferry ranges comparable to routes between New York City and Los Angeles. Service ceilings matched altitudes used by long-haul operators such as Pan American World Airways and were supported by pressurization systems certified under standards influenced by Civil Aviation Administration predecessors. Payload and balance characteristics made the aircraft suitable for medevac flights between institutions like Mayo Clinic and remote bases supported by United Nations humanitarian logistics. Fuel burn, climb performance, and approach speeds were documented by performance manuals used by operators including American Airlines training centers and independent pilot groups affiliated with NBAA.

Operational History

The type entered service on corporate routes used by executives from ExxonMobil, Ford Motor Company, and entertainment figures based in Los Angeles. It saw widespread civilian use across hubs such as Chicago O'Hare International Airport and London Heathrow Airport, and became a common platform for air ambulance providers operating under contracts with hospitals like Cleveland Clinic and Johns Hopkins Hospital. Internationally, aircraft were registered and operated in countries represented at ICAO assemblies and used by charter operators connected to companies like Wheels Up and legacy regional carriers with histories tied to Eastern Air Lines.

Accidents and Incidents

The type has been involved in several high-profile occurrences investigated by agencies such as the National Transportation Safety Board, Transportation Safety Board of Canada, and foreign counterparts like UK Air Accidents Investigation Branch. Incidents ranged from runway excursions at airports including LaGuardia Airport to controlled flight into terrain investigations near airfields used by NASA test programs. These events prompted updates to training curricula at institutions such as Embry-Riddle Aeronautical University and regulatory advisories from the European Union Aviation Safety Agency.

Operators and Civilian Use

Major corporate operators included fleets owned by conglomerates such as Berkshire Hathaway subsidiaries and executive flight departments of multinational firms like Siemens and Toyota. Charter and fractional ownership programs run by organizations such as NetJets and regional operators based in hubs like Miami International Airport and Dallas/Fort Worth International Airport utilized the model for short- and medium-haul missions. Air ambulance operators affiliated with networks like Air Ambulance Services and humanitarian agencies associated with Red Cross used conversions for medical evacuation roles.

Military and Special Missions

Armed forces and government agencies employed the type in roles for reconnaissance, electronic warfare, and personnel transport for organizations including the United States Air Force, Royal Canadian Air Force, and various European air arms represented in NATO. Special mission variants supported intelligence collection tasks in theaters where coalition partners such as United Kingdom and Australia cooperated, while law enforcement and customs agencies in countries like Mexico and Brazil used them for surveillance and interdiction coordination with ports such as Port of Miami and borders overseen by agencies modeled on INTERPOL cooperation.

Category:Business jets Category:Bombardier aircraft