OK here is the deal.

I have been flying electrics for the past 4-5 years and never had a serious problem with interference on any of my models. Well this rule fall flat on the face when I got the GP Slinger. When I tried the plane with the stocked motor I had no problem with interference but I thought it was a bit to the poor side on performace. Therefore I upgraded the motor to a Graupner 480 Speed, again with no problems of interference during flying. The performance however was still on the poor side (for my tasting anyway ).

Last October I purchased a BM 2408/21 bell motor together with its 15A speed controller in order to test it out (you can't resist a really cheap brushless and controller combo deal). Anyway, I put it in and realised the difference will be amazing. From this time onwards, the model experiences such a bad interference that I have managed to only have one flight and that was pretty scary one as well.

At first I thought it was a faulty speed controller, so I changed it to a Jeti 40A that I could spare, but did not make any difference. I then changed the receiver (the micro Futaba one) with a normal Futaba 6 channel and no difference, as well as a GWS 6 channel receiver. The receiver change did not difference. I have finally changed my 3S Lipo battery to another Lipo and to a 8cell NiMH pack with no luck, although I did notice that the interference with the NiMH was noticeably lower (which is logical). Finally I have tried every combination I could possibly imagine with the above equipment with no luck at all. I have also tried to cover both receiver and speed controller in tin foil to see if that will make any difference.

I must admit this has puzzled me for a long time now (nearly three months), and for the life of me I have run out of ideas. I don't want to give up, because I do like this flying wing and the brief experience I had with it was great even though it was scary. [:@]

Does anyone have any idea or even a suggestion that I could try?