I was invited to photograph some drone racing which was a new venue for me. I didn't know anything about it but I thought that the AutoFfocus systems of my cameras would not be up to this due to physical size and the speeds. This proved to be true but fortunately it was possible to pre focus on a zoneand wait for action within that zone. A bit of experimentation on shutter speeds (it was a bright sunny day) found a decent shutter speed range between 1/2500 to 1/3200 second to almost freeze the drone while showing some prop blur. With most of the action occurring at the single gate in the center of the course that became my target zone but I hadn't brought a tripod so held the camera to my face to try to keep the gate in frame, watched the drones approach with the other eye and used the ";spray& pray" method of holding the shutter button down as they passed near the gate. A tripod and shutter release cable would make this a relatively easy job.
My advice to anyone trying to photograph these is to set your ISO high enough, (but no higher) to allow shutter speeds between 1/2500 - 1/4000 using shutter speed as the priority (Tv or SS setting) that produces an aperture in the f 8 to f 16 range. This should give a bit of a depth of field and freeze the drone. Try to frame the gate (or another area) and then let the AF focus your lens slightly in front of it Once the lens has been focused turn the AF off (usually done with a switch on the lens). Repeat this if you move the camera relative to your target zone.