The Horus FPV platform can ether be 52in with the 4in. center section or 54in. with the 6in center section. The purpose of using this center section is to allow equipment (batteries/esc osd etc.) to be centralized and sill have separation. The center section is 3in thick and tapers down to 1.75 at the trailing edge. This allows for batteries to be stacked or on edge rather then placed along each wings leading edge as with other designs. The battery bay pictured is 5.57 long and 2in deep and 1.75 wide. I placed it 3in back from the nose and will balance the 8oz motor/prop with 9oz. Once covered /elevon's esc it will take about 12oz. Will be updating as much as possible.