The early right turn after starting was not me!!! Thought it was a loss of energy on the left elevator at full throttle pulling elevator but only enough power on the right elevator...before the crash the 6s 4400 Lipo connected with the UBEC was on 3,7 V per cell.
PS: Found out that there was a forgotten bad quality test Y cable on the left side for testing a second UBEC. Could have been a signal problem also I guess, because of the low quality Y cable.
After taking it out both elevators were doing good again! Fortunatly only a 25 bugs damage for a new wing spar and a plastic part to lock the left wing plus some Uhu Por foam glue