An accelerator pedal device includes: an accelerator pedal; a reaction force application device that applies a reaction force to the accelerator pedal; and a selection device that selects a characteristic between a first characteristic according to a running situation of a subject vehicle and a second characteristic specified regardless of the running situation of the subject vehicle. The surface of a dielectric layer is electrically charged by a flux on ions from a corona discharge source until a steady state is reached when the corona flux is balanced by the leakage current across a dielectric. The wing contour is determined by the configuration of the spars and ribs rather than by any conventional hard tooling which determines the wing contour in conventional processes.