Deflector exhaust nozzle for AS350/EC130 and for other single engine helicopters

A method of retrofitting a single engine helicopter of either Airbus models AS350 or EC130 comprising an original single straight exhaust nozzle for expelling substantially all exhaust of the single engine in the direction of s symmetrically positioned rear tail boom with a different exhaust nozzle, the tail boom terminating at a terminal end of the single engine helicopter, when the single engine helicopter is in flight, the helicopter further comprising a longitudinally centrally positioned single engine, a corresponding singled exhaust manifold that is centrally and symmetrically positioned and rear facing adjacent to the engine, wherein the single centrally and symmetrically positioned rear facing exhaust manifold is above the terminal end of the helicopter, the method for fixably securing retrofitting comprising:

• without compensating for yaw on the single engine helicopter, replacing the original single substantially straight nozzle with the different nozzle by removing fixing provisions for fixing the single substantially straight nozzle to the single symmetrically positioned rear facing symmetrical exhaust manifold of the helicopter so that the fixing provisions are reusable,
• to then fixably secure the single exhaust manifold the different nozzle being a single asymmetrical, curved and bent deflector exhaust nozzle being of one of a right hand Airbus deflector nozzle 365A54-2048-02, a right hand Airbus deflector nozzle 365A54-2048-04, or left hand Airbus deflector nozzle 365A54-2048-03, or a left hand deflector nozzle 365A54-2048-05, by reusing the fixing provisions for fixing the single substantially straight nozzle to the single exhaust manifold of the helicopter, the asymmetrical, curved, and bent deflector exhaust nozzle being configured with a bent direction to one of a left side or a right side of the single engine helicopter above the tail boom, the single asymmetrical, curved and bent deflector exhaust nozzle being configured so as to—direct substantially all the exhaust gases through a right hand Airbus deflector nozzle 365A54-2048-02 or 356A54-2048 or a left hand Airbus deflector nozzle 365A54-2048-03 or 365A54-2048-05 in the bent direction to deflect substantially all exhaust gases to one of the left side or the right side of the helicopter above the terminal end of the single engine helicopter, in a direction both away from the tail boom and away from the main rotor blades to avoid commingling of the exhaust gases with the downwash otherwise caused by the main rotor blades onto the tail boom when the helicopter is in flight when the helicopter was equipped with the original nozzle.