Diving on downwind?
I have an Altech 'Tamecat', a trainer type F-14 ripoff. This was an ARF, and powered by an old Pico .46. It has been a pretty reliable flyer up until the last couple of flights. For no reason that I can determine, it started wanting to dive when flying downwind. Into the wind it behaves well and climbs out o.k. on t/o, but it has become a bear to keep in the air when going downwind. There are no apparent changes in incidence-wing or elevator- that I can see. I use a Futaba 8UAF radio. A real puzzler to me! Anyone got a clue what I might look for?