Helicopter: Successful First Flight For Sikorsky's X2 Technology Demonstrator
In article
,
rjn wrote:
"David E. Powell" wrote:
Makes me think back to some of the studies looked at
in the 1980s, ...
People have been tilting at this windmill a lot longer than that.
There's a cute summary (circa 1997) at:
http://www.vstol.org/wheel/wheel.htm
In any event, I'm sure any patents that Lockheed had on
the AH-64 have expired by now :-)
Or their AH-56 patents, even. :}
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