Motion arrangement

A motion arrangement for a vehicle simulator for moving a load with six degrees of freedom is disclosed. The motion arrangement comprises struts 4, 5, 6, 7, each being rotatably attached to a respective primary sled 8, 11, 12, 13 and coupled to the load 1. An intermediate link 24, 25 is attached respectively to struts 4, 5 and secondary sleds 9, 10. The intermediate links are attached to the struts at a location between their respective sleds and the load and thus movement of the pair of the intermediate links causes the associated struts to pivot, in turn imparting motion onto the load. An elastic support 70 is coupled to the first support and exerts an upwards force on the load via the first support. The elastic support is mounted so that the rate of compression of the elastic support reduces with increasing downward vertical motion of the load.