The unbuilt H.XVIII represented, in many respects, a scaled-up version of the Horten Ho 229, a prototype jet fighter. The H.XVIII was one of many proposed designs for an Amerikabomber, and would have carried sufficient fuel for transatlantic flights. The XVIIIA variant, with its wood structure, buried engines in the fuselage, flying wing design and carbon-based glue component, would have been, in theory, the first stealth bomber in history.[1]