http://www.youtube.com/watch?v=aOOGX7t3sfg&feature=endscreen&NR=1
A wonderful film recently discovered and placed into the public domain of Italian early aviation,see a radial engine being built by craftsmen,see how a Fiat G.50 fighter starts life with a large solid model and then the production stages,watch it all the way through this is a gem of history.
Barry.