Here's a great kit for the T-28 Trojan, as used by the US Air Force and Navy since the 1950s. Can be made as either the T-28B or T-28D Nomad version. 

Parts come molded in grey. Photo-etched brass parts included.

This is a plastic model kit, which comes unassembled and unpainted. So glue, model paints and other basic modelling tools are additionally required.