The D.521 would have been a variant of the Dewoitine D.520 produced in the United States, and powered by the 1,040 hp Allison V1710-C15 engine. The collapse of France ended this project before any aircraft were produced.
French Fighters of World War II, Alain Pelletier
. This book tells the story of the French fighter aircraft that attempted to stand up the Luftwaffe in 1940. It covers seven main aircraft and a larger number of minor variants. Each aircraft is taken from development and prototypes through the battle of France and into the period after the armistice. [see more
How to cite this article:
Rickard, J (20 April 2007), Dewoitine D.522