In reply to Panioul: my Weatronics aerials go inside the fuselage down the left and right side - to try and hide them - I don't use a whip aerial. They are at the top of the fuselage, and the FADEC is on the bottom; the servos leads are towards the bottom, and there is about 12cm of distance between them and the aerials as they go down the fuselage. Looking at the recorded results show that there were reasonable signals during the flights, although I also got failsafe hits as did other users at Enniskillen. However, the link seemed fine to me on the ground.