This Day in Aviation History
February 20th, 1940
First flight of the Yakovlev Yak-4.

The Yakovlev Yak-4 (Service names Yak-4, BB-22bis (Blizhnij Bombardirivschik, “short-range bomber”)) was a Soviet light bomber used during World War II. It was developed from the Ya-22/Yak-2….

Source:
Wikipedia, Yakovlev Yak-4: http://gstv.us/1SFzysO

For further reading, please check out this article from Aviastar: http://gstv.us/1SFzV6o

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Photo from: http://gstv.us/1oSe27N

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