For my EU friends:

Who also have an understanding of flight regulations

In the USA, there are speed and power regulations on model aircraft and or drones. Can’t fly anything over 320 kph without getting thrown in jail.

Needing to test a drone capable of Mach .65 (804 kph).

Could you get away with this somewhere in the EU? I’ve heard Germany is a bit more lax.

Asking for a friend ;)