Has there ever been a fixed-wing aircraft whose propeller is in a scissor configuration? Like the Apache's tail-rotor seen here: What are the benefits of a non-orthogonal (scissor) tail-rotor?
This configuration improves the thrust and reduces the noise. If not, what are the drawbacks for such configuration when used for forward thrust?
The nearest match I could find was a stacked non-counter-rotating propeller. Not being coplanar is the only matching feature. It was on a modified Junkers W 34: