Undercarriage arrangements

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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[edit]

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
Undercarriage Layouts Bogie 02.jpg 2 wheels, 1 axle
Airbus A380 nose landing gear (consisting of a single 2-wheel bogie)
UndercarriageArrangements Bogie 03.jpg 4 wheels, 2 axles
An Airbus A330's central landing gear (consisting of two 4-wheel bogies)
UndercarriageArrangements Bogie 04.jpg 6 wheels, 3 axles
A Boeing 777's central landing gear (consisting of two 6-wheel bogies)
UndercarriageArrangements Bogie 05.jpg 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[edit]

Aircraft Wheels and
Configuration
Nose section Center section Example
An-225 32 wheels
[2x2]+[2x14]
Undercarriage Layouts FrontEnd 03.jpg Undercarriage Layouts Center 10.jpg
An Antonov An-225 with its impressive 32-wheel landing gear. Note the front gear made of two independent, parallel 2-wheel bogies

Airbus[edit]

Aircraft Wheels and
Configuration
Nose section Center section Example
A318, A319, A320, A321 6 wheels
[1x2]+[2x2]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 01.jpg
An Airbus A319 from bmi
A300, A310, A330 10 wheels
[1x2]+[2x4]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 02.jpg
A340-200/300 12 wheels
[1x2]+[2x4+1x2]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 05.jpg
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]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 06.jpg
A380 22 wheels
[1x2]+[2x4+2x6]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 09.jpg
Airbus A380 in Airbus markings

Boeing[edit]

Aircraft Wheels and
Configuration
Nose section Center section Example
737 6 wheels
[1x2]+[2x2]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 01.jpg
747 Jumbo Jet 18 wheels
[1x2]+[4x4]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 03.jpg
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]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 02.jpg
777 14 wheels
[1x2]+[2x6]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 08.jpg
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]
Undercarriage Layouts FrontEnd 01.jpg Undercarriage Layouts Center 02.jpg
A factory Boeing 787 Dreamliner
B-52 Stratofortress 8 wheels
[2x2]+[2x2]
Undercarriage Layouts FrontEnd 02.jpg Undercarriage Layouts Center 07.jpg
A Boeing B-52 Stratofortress featuring its characteristic landing gear