 Named "The Incredible", the I.C.1 was completed during the Club's summer camp at Gore Farm, near Shaftesbury, in September 1930.The I.C.1 had a straight, constant chord, thick section wing built around two spruce box spars with plywood webs.The I-section ribs were also made from spruce and ply, the leading edge from ply and the trailing edge form dural.