Inspired by Charles Lindbergh's solo flight from New York to Paris in May 1927, Metalcraft introduced a line of airplane construction sets. The first set had metal parts and was designed to build a model of the Spirit of St. Louis, but this was quickly expanded into a series of sets that could build a variety of airplanes with one or two sets of wings and one, two or three engines in many different configurations. The metal parts were finished with a thin greyish material, probably a crude zincplate, which wears off quickly leaving just the bare metal.
Metalcraft also produced kits to build an airplane hangar, a series of airships, an airport beacon, and even an airport!