ATR:

The OptimumChoicefor a FriendlyEnvironment

Modern Transport and Environment

Modern Air Transport & Environment 2

ATR: The optimum choice for a friendlyenvironment

Regional aircraft are good neighbours for theenvironment.Modern regional turboprop and namely ATR aircraftmeet both external noise and gazeous emission levelregulatory requirements with ample margins.

Regional aircraft operate at relatively low altitude,leaving the ozone layer unaffected and barelycontributing to pollution of the upper atmosphere.

Turboprops are highly efficient and tend tooperate at lower speeds. In recognition of their lowpollutant emission levels, turboprop aircraft remainunregulated and are not covered by ICAO Annex 16.They also have low OPR (Overall Pressure Ratio), 10-20:1 as against 20-40:1 for the large turbofans, andhence produce much more lower NOx levels.

ATR’s short field capability, their optimumintegration in air traffic flow, and theircumulative noise level margins to new potentialregulations or airport restrictions, make themwelcome visitors at the smaller city airportsand regional hubs with minimal environmentalimpact.

Both turboprop and turbofan aircraft use exactlythe same jet technology maximizing efficiency andreliability.

The regional aircraft: good neighbours

40,000 20,000 0 20,000 40,000 60,000

1.2 (3.5)

2.1 (5.4)

5.2 (13.5)

11.3 (29.3)

Area sq miles(sq km)

Comparative noise footprints - 90 EPNdBThe benefits of the new technology

Modern regional turboprop (ATR)

Modern regional jet

30-year old turboprop

30-year old jet

Distance fromthreshold (ft)

Distance fromstart of roll (ft)

Gas turbine

Turboprop/Jet: The same concept

Movement comes fromthe large quantity of airforced backwards at lowspeed by the propellers

Movement mainly comesfrom the air forcedbackwards at high speed

Thanks to the high technology 6-blade propeller systemand efficient aerodynamics, the ATR -500 series is one ofthe quietest in the industry.

The turboprop is more fuel efficientfor a given thrust.

The turboprop is more fuel efficientfor a given thrust.

ATR turboprop aircraft, recognized as the mostfuel efficient aircraft in their category, maintaindistinctive advantages with respect to othermodes of transport such as road and rail, also interms of pollutant emissions

Turboprop aircraft and ATR in particular canjustify their view that they are already respectersof the environment and good neighbours forairlines and airport communities.

ATR stands out as a modern, comfortable andcost saving regional turboprop with the particularecological advantage of safeguarding theenvironment.

ATR: The optimum choice for a friendly environment.

Modern Air Transport & Environment 3

ATR family, more and moreenvironment friendlyCumulative noise margin(EPNdB)With 26.6 EPNdB (ATR 72-500)and 31.3 EPNdB (ATR 42-500)cumulative margin to Chapter III,and comfortable margins tofuture Chapter IV noiseregulation, the ATR-500 serieshas the greatest latitude for evenmore stringent regulations onairport restrictions.

-35

-30

-25

-20

-15

-10

-5

0

ATR 42-400

ATR 42-320

ATR 42-300

New generation

ATR 42-500

EIS 1995

EIS1985

EIS 1997

EIS 1989

Quieter

Quieter

EPNdB

ATR 72-210

ATR 72-200

EIS: Entry into Service

Regional Air TransportThe benefits of technology forexternal noise

Total perceived noise on flyover,sideline and approach (EPNdB)

Year of introduction

Source : ERA (European Regional Airline Association)

ATR for a quieter environment

Source: ATR

All ATR models will comply witheven the most stringent stage

IV noise recommendations.

All ATR models will comply witheven the most stringent stage

IV noise recommendations.

ATR -500 Series Noise Levels - Certified Figures

Point of ICAO and FAR 36 ATR 42-500 ATR 72-500measurement Certified levels Certified levels

EPNdB EPNdB EPNdBChapter III limits MTOW 18,600 kg MTOW 22,000 kg

Take-off 89 76.6 79Sideline 94 80.7 83.2Approach 98 92.4 92.2Global 281 249.7 254.4Chapter IV limits (future) 271 -21.3 -16.6

Point of ICAO and FAR 36 ATR 42-500 ATR 72-500measurement Certified levels Certified levels

EPNdB EPNdB EPNdBChapter III limits MTOW 18,600 kg MTOW 22,000 kg

Take-off 89 76.6 79Sideline 94 80.7 83.2Approach 98 92.4 92.2Global 281 249.7 254.4Chapter IV limits (future) 271 -21.3 -16.6

-31.3 EPNdB-26.6 EPNdB

Source: ATR

F50

240

250

260

270

280

290

300

1955 1960 1965 1970 1975 1980 1985 1990 1995 2000

ATP

DHC 8-300

RJ85F100

Do 328

CRJ 200Saab 2000

Saab 340DHC 7

HS 748 F 27 Mk500

F28 Mk4000

F 27 H

ERJ 145

CRJ 700(prelim.)

DHC 8Q-400

ATR 42-500ATR 42-500

ATR 72-500ATR 72-500

New generation

ATR 72-500

ATR -500 series: the quietestneighbours in the sky!

ATR -500 series: the quietestneighbours in the sky!

Modern Air Transport & Environment 4

ATR for a cleaner environment

The ATR fuel efficiency: adaptedpowerplant

The proven level of low fuel consumption is aprimary concern for airlines eager to lower cashoperating cost and wishing to be environmentfriendly.ATR aircraft are recognized as the most fuelefficient aircraft in their category, thanks also tohigh-tech engines and propeller efficiency.Just for reference, an ATR 42 uses only as much fuelon a typical 200 Nm trip as a B747 uses in 10minutes of taxiing!

It appears evident that low levels of engineemissions are essentially driven by low fuelconsumption.On a 200 Nm sector, the ATR72-500 fuelconsumption per passenger is up to 11% lower thana typical European car; the associated ATR gaseousemissions per pax in terms of CO (CarbonMonoxide) are 15 times less than a car andcomparable to the train.

As far as the nitrous oxides are concerned, the ATRis 3 times less pollutant than a car and 40% lessthan a train. Moreover emissions of NOx (Nitrogenoxides) by new generation turboprops are at lowaltitude, well below the levels at which ozonedepletion is a major concern.

ATR: the green turboprop of tomorrow

0 1 2 3

Emissions g/pax km

Car

Train*

70 SeaterJet

Tprop(ATR 72)

Hydrocarbons Carbonmonoxide

Nitrousoxides

Gaseous Emission Spectrum200 NM (370 km) typical sector - 65% load factor

* Electricity from heavy fuel power station

Short Field Capability50-Seater jet vs ATR take-off field length

+40%

Thanks to their excellent landing and take-offperformance, ATR aircraft are able to use theshorter runways set aside for commuter operationsat many airport hubs.

They contribute in this way to reduce air trafficcongestion, decrease Airline fuel consumption andto reduce environmental impact.

Sources : Pratt & Whitney Canada - ICAO

0

1000

2000

3000

4000

5000

Gaseous Emissions(g/LTO cycle)

NOx CO

LTO cycle = ICAO reference

9,300 16,000

UHC

Landing, take-off cycleRegional turboprops vs large jets

B 737-300B 737-300

ATR 72-500ATR 72-500

ATR 42-500ATR 42-500

ATR: shortfield capability

ATR is easily manoeuvrable and features shorttake-off and landing capability to meet operationalrequirements for unrestricted passenger loading.

On a given standard mission, a 50-seater jetrequires about 40% more take-off field length thanthe ATR on a typical mission with a full passengerpayload.

Turboprops: unmatched airfield performance3,829 airports in the OAG data

Turboprops can access to 744 airports with a runwaylength between 1,000 and 1,500m98 in the US - 93 in Latin America - 76 in Canada -70 in Europe - 110 in Africa and Middle East -116 in Asia - 181 in AustralasiaRegional jets typically need runways of 1,600m.

Turboprops: unmatched airfield performance3,829 airports in the OAG data

Turboprops can access to 744 airports with a runwaylength between 1,000 and 1,500m98 in the US - 93 in Latin America - 76 in Canada -70 in Europe - 110 in Africa and Middle East -116 in Asia - 181 in AustralasiaRegional jets typically need runways of 1,600m.

GIE Avions de Transport Régional1, allée Pierre Nadot - 31712 Blagnac Cedex33 (0)5 62 21 62 21 - http://www.atraircraft.com - May 2001

ATR RegionalJet