i found it on the internet labeled as Amarillo usaf.

 

 

I found a free download for Amarillo usaf a while back. It may have only been good for 30 days, but I saved everything on my computer, so I think it will still work after 30 days. I will try to find the site.

Found it. Here is a link to a page that shows lots of free font downloads.
http://www.fontstock.net/

Thanks to Mike for the download, and to Thomas for the advice, but the "Amarillo USAF" isn't quite all what's needed.

I took matters in to my own hands and penetrated the local air warfare facility for some first hand recon.  Here's the get from the spy cams:

As you can see, the genuine article (Navy and USAF) has a 45 degree bevel, not a curved corner. Looks like I'll need to use hand drafting.

However, the Army lettering does have the curves. 

Of course a display aircraft isn't always the same as what flew.  The biplane is an RC model inside the museum.

I ran across an old photo of Eddie's ride while I was in the achives.