I think you are off on ebike motor limits in CA. throttles by themselves are legal on ebikes, however There is a speed limit of 28 mph for ebike motor assist, which sounds pretty low, but it feels actually pretty fast. In terms of efficiency ona regular bike. 28 mph puts up a lot of wind. However, on a recumbent trike like yours, perhaps witha full fairing, you could probably do in the 40s and not feel buffeted by the winds.
Very interesting project. i am very intrigued by electric minimalist vehicles. i’ve been riding from temecula to downtown san diego, going to the train in oceanside for half the trip. I would prefer a faster ebike, as it’s a lot fo pedaling.
