More and more stuff is appearing on the wikipedia, after reading an excellent piece about Spads, I found this: http://en.wikipedia.org/wiki/List_of_most_produced_aircraft WW1 types on the list are: Spad 13 8472 Avro 504 8340 Curtiss JN4 6813 Sopwith 1.5 6000 Sop. Camel 5500 Breguet 14 5500 SE5 5205 /Neil