[Oberst]

My understanding of the White Spiral on the Black Spinner is Optical deception for Allied air gunners. The logic was that the spinner spiral put off bomber gunners aim. It made them concentrate (the eyes catch the spiral movement) on the spinner as a aiming point so overshooting the fast moving target (deflection angle) when attacking at an angle to the bomber.

The time frame of the introduction of this design in the Luft. Staffels matchs the USAAF daylight bombing efforts of 1943 onwards.

Same could be said for other designs as well, for instance the factory 1/3 White on 2/3 RLM 70 spinner.

Thoughts?