"John Szalay" wrote in message
42...
"Canuck" wrote in
Hmmmm....curious/strange. I went and had a look and you are right. My
foggy memory failed me. The A-11/YF-12A nosecones were different but
not like what is present in that image. It almost seems like an
intermediate morph between the A-11/YF-12A and the SR-71.
The other possibility is that someone bent it. 
Nick
Attachment decoded: YF-12A.jpg
------=_NextPart_000_0009_01CADF55.58129EF0--
This photo is the YF-12A and the chine mod is for the ASG-18 fire
control radar. to insure directional stability for the chine being cut
three small fins were added to the rear of the underside of the YF-12A
So, I did get it right. I guess they tried a number of different chines/nose
cone profiles before they settled on what is the more familiar one from the
SR-71.
Neat.
Nick