An early aerostat (circa 1900) created from various sketches from the era of such craft. After looking at all, I built this aerostat (aerostat meaning light-than-air). Crafted in Rhino 3d 3.0. This model took approxmately 40 hours to construct and texture. I'm fussy about how meshes look, as I design for simulators, so the mesh construction of this model does not waste polygons. For use in any program capable of using 3ds models.