Well the c of g is way off needs to be at least 10mm behind the recommended, but a more fundamental problem is the declarge its negative rather than 1 to 0.5 positive incidence on the tail I have 2 deg negative, not wonder the thing will not take off unless I droop the ailerons as flaps, still I said I would persevier until I write it off, well I have, we had some very bad glithches on site over the week end I only just managed to save my small Yak, but the groovy went straight in from about 5ft when it went inverted by itself, so the whole thing is now accademic. I have to admit I am not dissapointed it save a lot of work and I can now go and get a true plane, this thing just did not fly true.

MIke