Can't even put into words how impressed I am with your art.
Some are blessed with such talent. You are.
Above still applies.
Is it more challenging (little/lot/not) to portray high speed as with Mirage III ?
Thanks for posting and look forward to more. :)
Concerning to the question of being more or less difficult to portray high speed or not, for me is equal.
The main point is not only the object to be illustrated but which impression you want to give to the final scene.
Each situation (propeller, jet, rocket,...) has it's own specifics, problems.
Thank you very much for the comment. For sure I'll post more works. :)