The Learjet 31 is a high-performance light business jet developed by Gates Learjet, combining the classic fuselage of the Learjet 35/36 with newer, more advanced wings from the Learjet 55. It’s best known for its excellent climb rate, speed, and high cruising altitude, making it one of the most capable small jets of its time—especially appealing to pilots and charter operators who prioritized performance.

✈️ Overview:

• Role: Light business jet
• Manufacturer: Gates Learjet (later Bombardier)
• First flight: May 1987
• Introduced: 1990
• Production ended: ~2003 (replaced by newer Learjets like the 40/45)
• Total built: ~200 (including the 31A)

🛠️ Key Specs (Learjet 31A – most common variant):

• Engines: 2 × Garrett TFE731-2-2B turbofans
• Max cruise speed: ~460 knots (529 mph / 851 km/h)
• Range: ~1,250–1,600 nautical miles (depending on load and conditions)
• Service ceiling: 51,000 ft (15,545 m)
• Takeoff distance: ~3,500 ft (1,067 m)
• Landing distance: ~2,700 ft (823 m)
• Crew: 2
• Passengers: Typically 6–8
• Cabin dimensions: Length: 12.9 ft (3.93 m) Width: 4.9 ft (1.5 m) Height: 4.3 ft (1.3 m)
  • Length: 12.9 ft (3.93 m)
  • Width: 4.9 ft (1.5 m)
  • Height: 4.3 ft (1.3 m)

🔍 Design Features:

• Fuselage derived from Learjet 35/36—slender and fast
• Winglets (borrowed from the Learjet 55) improved fuel efficiency and handling
• Delta fins on the tail enhanced stability
• Known for extraordinary climb performance—can reach FL410 (41,000 ft) in under 25 minutes
• Basic but functional interior—suited for short to mid-range trips

✨ Variant: Learjet 31A

• Introduced in 1991 with: Improved avionics (Bendix/King suite) Faster climb and cruise Optional RVSM capability Reduced cockpit workload, better systems integration Small upgrades in interior options
  • Improved avionics (Bendix/King suite)
  • Faster climb and cruise
  • Optional RVSM capability
  • Reduced cockpit workload, better systems integration
  • Small upgrades in interior options

✅ Strengths:

• Fast and high-flying—can operate above weather and commercial air traffic
• Outstanding climb rate
• Short takeoff and landing distances for its class
• Excellent handling and maneuverability
• Popular among charter operators, air ambulance, and private owners

❌ Weaknesses:

• Small cabin—no stand-up room, narrow aisle
• Limited baggage space (internal only)
• No full lavatory (some models have an enclosed potty seat)
• Ride can be choppy in turbulence
• Dated cockpit and cabin unless modernized

🛩️ Fun Fact:

The Learjet 31 can cruise at FL510 (51,000 feet)—higher than most commercial airliners. This capability allows it to fly faster and more efficiently, often above the weather and traffic.

👑 Legacy:

• The Learjet 31 and 31A were seen as "pilot's jets"—designed with performance first, and comfort second
• Although replaced by newer models like the Learjet 40/45, the 31A is still popular on the used jet market for operators needing speed, climb, and low acquisition costs