While flying this plane, it needs down elevator (up on transmitter) to make the plane fly lever at 1/2 throttle. While attempting a loop, the plane just kind of falls out of it right at the top, the tail just drops away. Fuel tank has a small crack in it at the top, will this cuase air bubbles in fuel line to carb and starve the engine?

So is this thing tail heavy?




ps, while landing it will drop like a rock, have to fly in and land under power.