wrote in message
y.com...

How about this ugly thing mounted on what appears to be the wing of a DC-9
(upper right image in the group of three).

http://www.aerospaceweb.org/question...on/q0067.shtml

It's not as pretty as the one in the picture in question. Although the DC-9
would have provided a much more likely vehicle for production. The UDF was
tested back when Pratt was sucking gas, but things have changed since then.