What is this flat plate sticking out of the tail of Learjet 24D? What is this protrusion on the tail of Learjet 24D (shown just above the avro museum logo) and what is its function?


Learjet 24D Tail closeup


Zoomed out image of the Learjet tail

Source: images were taken by yours truly
It's a VOR antenna. You can find more information about it in similar questions like this one or this one.