Curtiss Army Hawk family tree PDF for reference...

[jcf]

For them whats innerested. 

The diagram shows the relationships between the various service types and prototypes.

I'm sure BdB will like it. 

Cheers, Jon

[Brian da Basher]

Thanks Jon! That's a very handy thing to have. It sure beats reading a bunch of chapters in Swanborough & Bowers "U.S. Military Aircraft since 1908".

Brian da Basher