I can't say anything about how this antenna works on an RV, but I have one hanging in my rafters at home, feeding signals to my computer through an elgato hybrid tv tuner, and it gets good very good local reception. Of course, all the local stations are just a few miles away on top of Cheyenne mountain, so I get strong signals.
I expect I'll be mounting it on my Hunter I at some time, but first I'll need to get a 12v TV, or more likely, a laptop computer with TV tuner, that can be powered by the house
battery.