@idefix37 thanks for replying.
The trajectory plugin is ideal for planning max distance flights from a single location.
I'm looking for a layer that highlights regions where there are different directions in the lower 10000 feet. e.g. red shading for a max of 180 degree difference, orange for 150, yellow for 120 etc Once I can see these broad areas of interest then I can manually investigate the possibilities for planning out and return flights.
The following 3 images are for winds at 5000, 6400, and 10000 feet in SE Australia. The bottom right shows a 180 degree different between the 5k and 10k winds.
winds.png
If anyone is interested in helping with the plugin I would be happy to develop a detailed use case and specification,
Peter