The first full-production of the 'Dora' series was the Fw
190D-9, armed with a pair of MG131 13mm machine guns above
the engine and two MG151 20mm cannons in the wing roots. The
Dora was a formidable fighter, though it came too late in the
war to make a significant impact. Many of these aircraft were
lost to pilot inexperience coupled with the aircraft's stability
in certain flight regimes (especially at take-off and landing).