Today was a beautiful day to fly my brand new Viperjet MK 11 powered by a simjet 2300.This was my second time flying this jet,when all of a sudden the whole back of the jet started to shake violently from FLUTTER.The back hatch flew off,the front hatch had pushed into the fuselage,I immediately went to idle on the throttle,made a left turn,droped the landing gear down,control of the jet was very mushy and the jet was coming down fast and very little control on the elevator.I managed to land the jet with one elevator servo working,breaking the brand new landing gear, bending the nose gear and bending the spars on the wings. After assessing the damage, the FLUTTER was caused by the RIGHT HORIZONTAL STAB coming loose, not from the screws but from the WOODEN BLOCK in the fuselage, this block separated from the fuselage while IN FLIGHT. Looking into the tail of the plane you cannot see this block as it is covered by the back former. I lost 4 digital servos,bent both wing spars broke 2 struts (mains),bent nose gear and 1 hatch latch, all caused from STRUCTURAL FAILURE. I will contact TAM tomorrow.