ORIGINAL: yb2normal

Generally speaking I like to mount mine down because it helps keep a clear line of sight between the antennas... mounting on top will put the plane between the antennas at certain times. Now having said that, I mounted the system on my Graupner Terry with the antenna sticking up and it worked fine.

Can you show a picture of both your airplane installation and how you set up your receiver? That will go a long way in helping to diagnose any issues.

At 2.4ghz, very small tweaks can have a significant impact. Moving the antenna a few inches in either direction can have a surprisingly large effect. When I'm mounting a system in a plane for the first time, I just duct tape it to the outside of the plane because I *know* I'll be moving it around as I look for an installation that gives me the best results.

Regards,
Bill