Noise reduction hangar (for Engine Run-up)
Kawasaki successfully delivered Noise Reduction Hangar for aircraft engine run-up (NRH) at Narita Airport in 2001. The NRH can be used for a variety of models such as B747, B777, B767, B737, A320, MD11, DC10 etc to reduce noise level to 60dB(A) during engine run-up at the boundary line of the airport. The NRH, with its high aerodynamic performance, is an engine run-up facility designed for all wind directions up to 25 knots (13m/sec.).
This facility is rated as the first noise reduction hangar with high performance in the world.
- The NRH is equipped with skyward roof intake/exhaust vent to deaden the noise below 60dB at the boundary line.
- Noise absorbing structure installed on the wall, roof and vent can also reduce infrasonic noise.
- Even under rainy weather, engine run-up operation can be done safely in all wind direction up to 25 knots (13m/sec.) of wind velocity.
- There are commutation vane and screen to regulate airflow in the hangar.