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In an aircraft undercarriage suspension, a cross member having spaced bearings for mounting said cross member on an aircraft and a bearing part between said spaced bearings; a resilient telescopic unit having a part mounted in said bearing part for sliding movement relative to said cross member; and tie members pivotally connected respectively to said unit and to said cross member at points spaced from said bearing part, whereby the undercarriage vertical load is transmitted from said unit to said cross member wholly through said tic members.