Movable cargo support having vertically biased wheel members

A movable cargo support for being received in a cargo hold or passenger cabin of an aircraft, the movable cargo support comprising:

• a base having:
• a support surface configured to support one or more cargo elements attached to and/or supported on the support surface;
• and
• a bottom surface, which is opposite the support surface and comprises one or more supports, which extend in a common support plane and are configured to support the base on a floor surface of the cargo hold or of the passenger cabin;
• a plurality of wheel assemblies, each wheel assembly comprising a at least one wheel that is configured to rest on the floor surface of the cargo hold or of the passenger cabin and is rotatable about a rotation axis that is parallel to the support plane;
• wherein the at least one wheel of each of the plurality of wheel assemblies is movably mounted on the base, such that:
• the at least one wheel pivots about a steering axis of that wheel assembly, which steering axis extends perpendicularly to the support plane;
• and
• the position of the at least one wheel parallel to the steering axis is configured to be altered between an extended position and a retracted position;
• wherein, in the extended position, the at least one wheel protrudes beyond the support plane;
• wherein, in the retracted position, the at least one wheel is retracted from the support plane towards the support surface, so that the at least one wheel does not extend beyond the support plane;
• wherein each wheel assembly comprises a biasing member configured to bias the at least one wheel towards the extended position with a biasing force acting in a direction parallel to the steering axis;
• and
• wherein the biasing member is configured such that the biasing force is higher than a maximum gravitational force which acts on the at least one wheel and forces the at least one wheel towards the retracted position when:
• the at least one wheel is on the floor surface of the cargo hold or of the passenger cabin;
• and
• one or more cargo elements, which have a maximum allowable weight for the cargo support, are on the support surface;
• and
• wherein the biasing force exceeds the maximum gravitational force by at most 50%.