Mrclueless

Which way does the tail spin? If you look straight at the heli from the right side, the tail rotor should spin counter clockwise, that is the top side spins away from the front. Conversely, the main rotor blades should spin clockwise looking from the top down, my tail rotor doesnt spin when I turn the main rotor by hand as it is free wheeling and mine doesnt have a direct drive to the tail, so it isnt driven by the main rotor during auto rotations. It might be if yours doesnt spin like I described, maybe the tail belt is turned the wrong way. I would also check the beft tension. The belt shouldnt rattle around in the tube. Mine doesnt spin till I have some rpm up as well. Did you balance the main blades? Are they tracking correctly? Where is the vibration at mostly, the head or tail. If your tail rotor shaft is bent it will shake so fast it will appear blurry. Same goes for if the main shaft or feathering spindle is bent, the head will blur.