I know that IOTL the Germans used the old Heinkel He 50 as a tank buster for much of WWII. As near as I can tell they were fairly effective. Their slow speed and excellent handling made them very accurate and the units equipped with them scored well compared to those using JU 87s and the like. Perhaps the Germans realize this and develop a full blown major production run of biplane dive bombers which see extensive service on the western front. Maybe if it was designed late enough in the war Hitler would even order the thing be given Jet engines to make it even more unusual.