This paper discusses the mannequin design developed for the Smithsonian National Air and Space Museum’s (NASM) exhibit, America by Air. It is a design that has been used by the author for several other projects subsequent to its development. NASM wanted an easy-to-dress mannequin form, for both male and female garments, that was made from a list of materials specified by them. A design was created with the help of SmallCorp Inc. What differentiates this mannequin from others is the internal armature, which later became known as the “side-ways ladder.” The internal armature makes the form easy to produce, reliable and versatile. One step of the mannequin’s production is delegated to metal working specialists. This allows the conservator to focus on shaping the Ethafoam. Often conservators try to undertake all steps of mannequin production. Now SmallCorp Inc can create the armature onto which the mannequin is built.