Improvement in aircraft noise performance has occurred over time

Aircraft categories as defined by ICAO/CAEP independent experts (IE)

 

Description

MTOW (tonnes)

RJ

Regional Jet

30 - 50

SMR2

Short/Medium Range 2-engine

58 - 98

CROR

Counter-Rotating Open Rotor

58 - 91

LR2

Long Range 2-engine

170 - 290

LR4

Long Range 4-engine

330 - 550

Airbus A380 plotted for information as outside weight range for LR4 (575 tonnes)