The single YB-47J was a standard B-47E modified to carry and evaluate
the new MA-2 radar bombing-navigation system that had been designed for the
B-52.
Sources:
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American Combat Planes, Third Enlarged Edition, Ray Wagner, Doubleday,
1982.
-
Post World War II Bombers, Marcelle Size Knaack, Office of Air Force
History, 1988.
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The Boeing B-47, Peter Bowers, Aircraft in Profile, Doubleday, 1968.
-
Boeing Aircraft Since 1916, Peter M. Bowers, Naval Institute Press,
1989.
-
United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian, 1989.
-
Boeing B-47 Stratojet--Variant Briefing. Bill Yenne, International Air Power Review, Vol 6, 2002.