This Day in Aviation History

January 28th, 1971
Commander Donald H. Lilienthal, USN flew a P-3C Orion to a world speed record for heavyweight turboprops. Over 15–25 kilometers, he reached 501 miles per hour to break the Soviet Il-18’s May 1968 record of 452 miles per hour.

Wikipedia, Lockheed P-3 Orion:

Editors note:
When researching for this post I noticed another source mentioned this event happened on the 27th instead of the 28th. 

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