Undercarriage arrangements
Below are featured the wheeled undercarriage (also called landing gear) 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 (single-wheel unit or bogies composed of multiple wheels) used on most aircraft undercarriages.
| Symbol | Wheeled unit | Example |
|---|---|---|
 | 2 wheels, 1 axle |  Airbus A380 nose landing gear (consisting of a single 2-wheel bogie) |
 | 4 wheels, 2 axles |  An Airbus A330's central landing gear (consisting of two 4-wheel bogies) |
 | 6 wheels, 3 axles |  A Boeing 777's central landing gear (consisting of two 6-wheel bogies) |
 | 14 wheels, 7 axles |  An impressive, and unique of its kind, Antonov An-225's 14-wheel bogie from the plane's central landing gear (consisting of two 14-wheel bogies) |
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
| Aircraft | Wheels and Configuration | Nose section | Center section | Example |
|---|---|---|---|---|
| An-225 | 32 wheels [2x2]+[2x14] |  |  |  An Antonov An-225 with its impressive 32-wheel landing gear. Note the front gear made of two independent, parallel 2-wheel bogies |
Airbus
| Aircraft | Wheels and Configuration | Nose section | Center section | Example |
|---|---|---|---|---|
| A318, A319, A320, A321 | 6 wheels [1x2]+[2x2] |  |  |  An Airbus A319 from bmi |
| A300, A310, A330 | 10 wheels [1x2]+[2x4] | |  | |
| A340-200/300 | 12 wheels [1x2]+[2x4+1x2] | |  |  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 |
| A340-500/600 | 14 wheels [1x2]+[3x4] | |  | _arrives_London_Heathrow_31May2009_arp.jpg) Airbus A340-600 of Virgin Atlantic |
| A380 | 22 wheels [1x2]+[2x4+2x6] | |  | _overflies_Filton_Airfield_(England)_18Jul2010_arp.jpg) Airbus A380 in Airbus markings |
Boeing
| Aircraft | Wheels and Configuration | Nose section | Center section | Example |
|---|---|---|---|---|
| 737 | 6 wheels [1x2]+[2x2] | | |  A Boeing 737 from Southwest Airlines |
| 747 Jumbo Jet | 18 wheels [1x2]+[4x4] | |  |  A Boeing 747-400's central landing gear. Note the strong backward tilt of the bogies, typical of 4- and 6-wheel bogies, to ensure efficient touch down with the ground when landing |
| 757, 767 | 10 wheels [1x2]+[2x4] | | |  A Boeing 757-200 from British Airways |
| 777 | 14 wheels [1x2]+[2x6] | |  |  A Boeing 777-200 from United Airlines. Using 6-wheel bogies, instead of the common 4-wheel bogies, was visionary at the time of the design of the 777 |
| 787 Dreamliner | 10 wheels [1x2]+[2x4] | | |  A factory Boeing 787 Dreamliner |
| B-52 Stratofortress | 8 wheels [2x2]+[2x2] |  |  |  A Boeing B-52 Stratofortress featuring its characteristic landing gear |