Undercarriage arrangements


Below are featured the wheeled undercarriage arrangements of some modern commercial jet airliners and large military aircraft.

Types of wheeled units

This table shows the main types of individual, basic wheeled units used on most aircraft undercarriages.
SymbolWheeled unitExample
2 wheels, 1 axle nose landing gear
4 wheels, 2 axles's main landing gear
6 wheels, 3 axles's main landing gear
14 wheels, 7 axles's 14-wheel bogie from the plane's main landing gear

The tables below show how various types of wheeled units are arranged to form the undercarriages of some popular aircraft from manufacturers Antonov, Airbus, and Boeing.

Antonov

Airbus

AircraftWheels and
Configuration		Nose sectionCenter sectionExample
A318, A319, A320, A321 '6 wheels
+		 from bmi
A300, A310, A320, A33010 wheels
+		 from Biman Bangladesh Airlines
A340-200/30012 wheels
+		 from Kuwait Airways. Note the usage of an isolated 2-wheel unit in the central landing gear |alt=An Airbus A340-300 from Kuwait Airways. The usage of an isolated 2-wheel unit in the central landing gear is unique to this aircraft and the DC-10-30.
A340-500/60014 wheels
+		 of Virgin Atlantic
A350-90010 wheels
+		 of Vietnam Airlines
A350-100014 wheels
+		 of Qatar Airways
A380'''22 wheels
+		 in Airbus markings

[Boeing]

AircraftWheels and
Configuration		Nose sectionCenter sectionExample
717, 727, 7376 wheels
+		 from Southwest Airlines
74718 wheels
+		's main landing gear. Note the toes-up bias angle of the bogies/trucks on the wing gear, to ensure correct stowage upon retraction
757, 76710 wheels
+		 from British Airways
77714 wheels
+		 from United Airlines. Using 6-wheel bogies, instead of the common 4-wheel bogies, was visionary for contemporary aircraft at the time of the design of the 777
787 Dreamliner10 wheels
+		 Dreamliner
B-52 Stratofortress8 main wheels plus 2 outrigger wheels
+		 featuring its characteristic landing gear with 8 wheels under fuselage and two outrigger wheels near wingtips