On Sun, 10 Apr 2011 23:34:02 -0700 (PDT), "miso@sushi.com"
<miso@sushi.com> wrote:

http://www.google.com/patents/about?id=ZH8rAAAAEBAJ&dq=4,066,226

The patent holder's post got placed under that whack jobs thread, so I
started a fresh post. At least in Google Groups it appears that way.

I'm not really sure what makes this steathly, but my guess (and feel
free to correct me) is the treatment to the side of the airfoil. It
seems the curved surface wouldn't reflect as much radar.

      Sorry about that, I was using a computer at the library which
doesn't allow a right click and my first attempt failed because
the image size was too big, and the image software on the
computer didn't add a file extension and windows was
configured to hide file extensions, so the I wasn't able to
post paper number 11 in that patent file, I will try again.

NEC was written around that time. When you read the Rich's
"Skunkworks", you get the impression Lockheed had their own software
for analyzing radar reflections, but NEC had this capability.

         That is what Ben Rich's book says, but there is so much
inconsistency in dates that I have no confidence in how accurate
any of it is.

         Something got DARPA and the DOD interested enought to
start programs, perhaps paper number 11 that I will post in the
next couple of articles was instrumental, but Lockheed may
have already been testing flat surfaces by then, I didcussed
the art with an airforce guy in early 1976 who seemed to know
some of the people working on radar avoidance in Calif.

I don't see this patent assigned to a corporation, so did it get
implemented? Was it analyzed in NEC?

       No, in fact I began to worry about the flat surface technology
being implemented by other countries before the United States
and did not try to get anybody interested, although NASA did
test truncated airfoils later, but it doesn't appear they used the
airflow through the ends of the airfoil.

      I will try to post 4 papers the show my start of the flat
surface technology, I considered the flat surface easiest
to implement and did not feel anybody had a need to 
know the theory behind Patent 5,488,372.

Ken