Hello, I am new to this community but I have been into small scale rocket testing and have been building RC custom drones for a few years. I know with my RC drones I am not allowed to fly higher that 400 feet legally, which truely limits my testing. At the speeds these planes fly a small change in my elevators can cause me to go above this legal limit or in worse cases, it can cause the drone to fully crash. I have never launched an actual rocket and do not know the legal steps i have to go through to legally go about it. I have a few different designs i want to actually test in a launching system and want to go about doing this fully legal and obviously safely. Also if anyone has any information regarding how i could go about getting permission legally to actually test my RC drones at a higher altitude so i can actually push the limits on my designs without having to stay below this 400 feet limit that is set. Any information would be greatly appreciated in who i have to contact about getting the permissions i need to go about further and better testing of my designs.