How to contact professors for a Ph.D position in France, when I don't have a research question? I completed Master's in Netherlands in Aerodynamics and I am looking for Ph.D in the field of aerospace in France. In Netherlands &amp; Germany, I can see the available Ph.D offers in University website but I don't know how to search in France? I really want to stay there!

I see some people in this forum answered to contact professor directly (for example, in What is the process for PhD applications and contacting professors in France?) but I don't have an Ph.D research question. So, don't know how to contact them. Can someone tell me how to contact a professor and whom to contact for funding?
Professors (and possibly alumni) at your university in the Netherlands probably have contact information for collegues around the world. If not, they could help you find someone who does.

Otherwise, the GIFAS (the national association of aerospace industries)  has published a catalog of École Doctorales and a website which has a section about training.