I've recently taken up motorcycling (HUGE fun, btw), and have been trying to think of new and strange ways to shoot video or photo-every-[interval] outside of the normal "stick the gopro to the helmet"/"stick the gopro to the bike," and recently I came across the idea of a tethered multirotor. Most that I've seen are either remote-powered (tether also is a power cable) for longer flights or area surveillance, or are roughly the size of a Mavic Air and carry their own power source, but are tethered more for perception than anything else (don't have to ask "who's flying that drone?" when all you have to do is follow the tether down to the person holding it"). This gave me the idea of making a relatively small (maybe 250 size?) remote-powered multirotor, and put a tether (likely high test fishing line, either a single strand or braided) either on the tail section of the bike, or on something like a GoPro Chesty mount worn backwards. The bike has a battery tender lead installed, so having a constant ~14v isn't an issue. My main concern is how to control it, specifically how to get it to decelerate at least as fast (preferably faster) than the bike. Distance behind the bike and altitude should be mostly a factor of the length tether I use, so that I'm less worried about, same with yaw (a vertical stabilizer fin would do wonders for that). One idea that comes to mind is to have a small (or small pair) of EDFs aimed directly forward, let the quad literally try to pull itself backwards against the tether, but I worry about how much current that could end up drawing as the EDF could end up working against at least 100mph of wind, and I can't imagine they are designed around. The thought of angling the 4 thrust motors back slightly (similar idea to how racing quads angle the camera way up so that it is level during forward flight, just backwards) also comes to mind, but again, I don't know how nicely the motors would take to being essentially thrown into a wind tunnel and asked to maintain level flight. My biggest concern is not getting clocked in the back of the helmet with my own multirotor, should I have to panic stop. Anyone have any thoughts?