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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