[jzoopster49]

Also, in Harry Turtledove's alternate WWII, the CSA side with a non-Nazi Germany, resulting in a lot of German designers crossing the Atlantic. One example of this is a CSA aircraft referred to as an "Asskicker" with gull wings,fixed landing gear and sirens mounted on the gear fairings. What German aircraft do we know of that matches that description?

Sorry, you've got that backward. In Turtledove's Alternate 20th century, the CSA is allied with Britain, France, Russia, and others in both "WW1" and "WW2". The USA is allied with Germany, Austria-Hungary, and other members of the central powers in both wars. The Central Powers (and USA) win his WW1 and the basic same alliances go at it again in "WW2". You are right though, Germany is not Nazi - it is still the German Empire. I think Turtledove chose Nazi imagery for the CSA because they get taken over by a Nazi-like party in the 1930's and try to exterminate all their black people in concentration camps.