Thanks guys for your replies.
And yes I meant LOS.
Meanwhile I tried it twice and you guys are right - it's hard to estimate the heading of the bird, since it is so small and symmetric.
Will try to use my goggles next time.
I'm going to buy such a Racer next month.
Any recommendations, suggestions?
Was RC pilot in my youth - hope l can handle such a formula 1 bird?
I think I will start with LOF exercises before going into FPV adventures..