the castings for the foil assembly were three different parts 1 a t bar consisting of strut and fuselage as a single component 2 front wing and 3 rear wing the new means of manufacturing includes four parts 1 the rear wing 22 2 front wing 20 3 the strut 14 and 4 the fuselage 18 the strut 14 and the fuselage 18 are heliarced a means of welding aluminum together to form the t bar as shown in fig4 the extruded strut 14 fits into the fuselage slot 24 as shown in the drawings and heliarced 26 as depicted in the drawing this process is completely new from the previous method of manufacturing in the past the extrusion process also provides the capability of including the front wing 20 and rear wing 22 within the extruded fuselage 18 as a single unit thus reducing the number of parts to two for example the fuselage 18 and front wing 20 and rear wing 22 can be cut to the desired shape from a single aluminum extrusion using a programmable milling machine which is available in the marketplace this reduces assembly time since the wings do not have to be joined to the fuselage in separate operations the extrusions are formed by drawing hot formable aluminum through a die such.