undercarriage
Vehicle's lower structure
The undercarriage is the framework beneath a vehicle that supports the body and includes wheels, axles, and suspension.
For aircraft, it's the landing gear—wheels or skids that deploy for takeoff and landing.
Informally, undercarriage refers to the underside of an animal or, humorously, a person's lower body or genitals.
Structural support base
- suspensionTemporary halt or exclusion
- axleShaft for wheel rotation
- drivetrainVehicle power transmission system
- subframeSupporting frame beneath another
crossmember · control arms · skidplate · oil pan · differential · transmission · drive shaft · tie rod
Aircraft ground support apparatus
- wheelsCircular rotation devices
- strutsWalks with swagger
- fuselageAircraft's central structure
- retractableAble to draw inward
hydraulics · touchdown · runway · tarmac · descent · approach · belly landing · wheel well
chassis
Structural support base
- suspensionTemporary halt or exclusion
- axleShaft for wheel rotation
- drivetrainVehicle power transmission system
subframe · crossmember · control arms · skidplate · oil pan · differential · transmission · drive shaft · tie rod · ball joint
landing gear
Aircraft ground support apparatus
retractable · hydraulics · touchdown · runway · tarmac · descent · approach · belly landing · wheel well · nose gear
framework
Underlying support system
brace · strut · girder · truss · reinforcement · mount · bearing · railcar · trolley · bogie
privates
Lowest enlisted rank
nethers · downstairs · bits · junk
undercarriagetop
Uppermost part or surface
roof · superstructure · rooftop · upper body · topside