In a method of manufacturing a blade shell half of a pre-bent wind turbine blade by means of vacuum-assisted resin transfer moulding, a fibre lay-up is placed on a mould surface and a distribution layer is placed above the fibre lay-up. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The moving object includes: a second RF communication unit for wirelessly transmitting a signal indicating successful reception of the moving object directing signal to the moving object directing unit, and a controller for controlling operations of a wheel. Methods of using such systems are also provided.