some more info on the A-9 models,they also had a little bit more rear armour and better rear vision like the D-9.....and they had two different engines available......one for most A-9 and one for the A-9 r-11 which was the bad weather/night fighter. acording to heinz nowarra(luftwaffe parts supplier during ww2and Luftwaffe historian) the A-9R11 was a little faster at altitude but slower on the deck than the std A-9....and they were used in daytime and during good weather...face it the Luftwaffe was using anything flyable in 1944late onwards.
