<a href="https://en.wikipedia.org/wiki/Dewoitine_D.510" class="extiw" title="en:Dewoitine D.510">Dewoitine D.510</a> under test at Martlesham Down with RAF serial <i>L4670</i>.  October 1936, Hispano-Suiza 12Ycrs engine.
TSRL
2012-05-15
British Flight Testing (Tim Mason)