Did this one for the Final Reunion of the NACA staff to be held locally this weekend. As you all know, the NACA ceased to exist when it was gobbled up by NASA when it was created in 1958. There are still about 200 NACA personnel alive.
Tried to meet two big challenges in this one. As good friend gamary and others point out, white, yellow, and orange aircraft are really tough to shade and not look dirty.

Comments on how to improve are very welcome.
Anyway, had fun doing it although the theme music from "The Right Stuff" stayed in my head as did "There was a Demon that lived in the sky..."
Joe