Ferry flight at approximately 2-300 ft (AGL). Turbulence experienced. Due to an observation on ground, pilot initiated a 360 degree turn with 15 degree bank to the right. Airspeed varied between 80 to 45 kt during the turn due to wind conditions. In the last part of the turn, the pilot experienced a loss of lift, pushed the cyclic forward and increased collective to 117 % torque, but helicopter continued downwards and hit the ground vertically. The helicopter was exposed to the heavy landing and the landing gear was deformed. In addition the attachment structure for the tail skid was damaged. The nose hit a stone and the right hand windshield cracked
