Builders of such fine aircraft as seen above, “BP” was a great innovator of design, but by the 1950’s they faded away. I have always had a soft spot for the “Defiant.” It got a bad reputation for its vulnerability, but I like the design.
When this PBY ad was seen in 1940, the aircraft was already a seasoned veteran.
The Convair 37 never made if off the drawing-board.
Official newspaper of Sikorsky, 1930.