ORIGINAL: mr_matt
THere are a couple of start up companies working on it, as well as a couple of modelers. THe only commercial system I am aware of has now been derated to surface use only, no surprise to me as his unit uses a very simple antenna system that I did not ever think would work in a plane.
The system I was referring to is the one now being sold by Horizon. He had an idea (for a very short time) to use it on helicopters....he dropped that idea.
BTW I looked through the thread, not sure where the "naysayers" are in this thread? I am working on it all the time.