U.S. Air Force Analysis of Flying Objects in the United States, 1-100

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An unusually loud roar attracted the observer and upon looking up he saw a group of very light-colored objects at an altitude of about 50° bunched rather closely with no regular formation. The group could have covered 1-1/2° angular diameter in the sky. There might have been 10 As a group they were proceeding to cover 30° of arc estimated of course in 10 to 15 seconds. If one of them subtended 1/10° with a possible wing spread of 100 ft it would put it at a distance of over 10 miles, and quite invisible for a light object. With 30° arc of travel at a 10 mi distance would be roughly 5 miles in 15 seconds or 30 mi per minute or 1300 mi per hour. Rather fast for a bomber. A 50 ft object at 5 miles dist. would be about 600 mi. per hr - also fast going. The only concrete evidence of form appeared on the left tangent of the group - two dark shaped forms: These could have been tail wings. But since they were in no regular formation, and seemed to be moving irregularly like a swarm of bees why shouldn't all of them have had wings? The loud roar suggests they may have been much closer and rather small. The sky background was a hazy blue with the sun behind. One plane towing a lot of balloons, the witness thought, would have been easily recognized.

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