Home Archive Search Media Media-418454.jpg FRE 8947 IMAGE Download Image By downloading this image, you are agreeing to our Terms and Conditions A psychrometer fitted to the nose of a B-17 Flying Fortress used for weather reconnaissance by No 519 Squadron, RAF. Revisions Date: 2 Feb 2015 10:00:10 ContributorAAMChangesAAM ingestSourcesIWM, Roger Freeman Collection