An aircraft undercarriage comprises a four‐wheeled bogie, of which two of the wheels, 16, 17, are independently rotatable and are mounted on a common transverse axle 15 at the lower end of the undercarriage leg 13, the other two wheels 21, 24 being mounted in tandem in a fore‐and‐aft plane extending between and parallel to the wheels 16, 17, and being castorable and/or steerable. The wheels 21,24 are carried by brackets 18, 19 mounted on the axle 15 and provided with supplementary shock absorbers 26, 27 connected to a cross‐head 28 on the leg 13. Antishimmy devices may be provided for the castoring wheels, together with means for aligning them when the aircraft is airborne.
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