A4
14th Jun 2007, 14:55
Is this the future?
http://www.easyjet.com/EN/News/easyjet_ecojet.html
Unfortunately I can't find how to upload an image - but think MD-90 with big unducted fans above the fuselage at the rear.......:eek:
Dubbed the “easyJet ecoJet”, the aircraft would need to be 25% quieter and would emit 50% less CO2 and 75% less NOx than today’s newest aircraft (the 737 and A320 families of aircraft).
The aircraft will incorporate the latest research by airframe and engine manufacturers around the world – all of which can be incorporated into an aircraft that should be in operation by 2015. The projection for the 50% CO2 reduction is based on the findings from the latest research by the industry leaders and will come from the engines (25%), the lightweight airframe (15%) and from improvements to air traffic control technology and design (10%).
In easyJet’s current configuration and operation, the projection for the eco-liner would generate less than 47g of CO2 per passenger km. For comparison, easyJet’s current operations generate 97.5g of CO2 per passenger km, the Toyota Prius emits 104g of CO2 per kilometre; and the European car industry has recently been given a target to achieve 130g of CO2 per kilometre.
The design will contain a number of key features to make it radically more environmentally efficient:
Rear-mounted “open-rotor” engines offer unrivalled environmental performance for short-haul flying due to their higher propulsive efficiency. However, there are significant difficulties in fixing such a large engine under a wing of a narrow-body aircraft, making rear-mounting of the engines the optimum solution
A lower design cruise speed to reduce drag and a shorter design range to reduce weight
Noise reductions are expected to come from a gear box between the engine and the open-rotor blades keeping them subsonic during take-off and landing, the use of the rear empennage to shield the ground from engine noise, and airframe improvements (such as no slats on the front of the wing)
The airframe will be made of advanced weight-reducing materials similar to those used in current projects like the Boeing 787, which itself is estimated to be 27% more fuel efficient than the aircraft it will replace in many fleets
Even as global demand for air travel matures over time, several step-changes in technology will be needed to reduce the emissions from aviation in 2050 to below 2005 levels. The “easyJet ecoJet” will be the first of these step changes and alone could lead to a stabilisation of emissions from short-haul aviation at 2005 levels until 2035 providing massive environmental benefits.
A4
http://www.easyjet.com/EN/News/easyjet_ecojet.html
Unfortunately I can't find how to upload an image - but think MD-90 with big unducted fans above the fuselage at the rear.......:eek:
Dubbed the “easyJet ecoJet”, the aircraft would need to be 25% quieter and would emit 50% less CO2 and 75% less NOx than today’s newest aircraft (the 737 and A320 families of aircraft).
The aircraft will incorporate the latest research by airframe and engine manufacturers around the world – all of which can be incorporated into an aircraft that should be in operation by 2015. The projection for the 50% CO2 reduction is based on the findings from the latest research by the industry leaders and will come from the engines (25%), the lightweight airframe (15%) and from improvements to air traffic control technology and design (10%).
In easyJet’s current configuration and operation, the projection for the eco-liner would generate less than 47g of CO2 per passenger km. For comparison, easyJet’s current operations generate 97.5g of CO2 per passenger km, the Toyota Prius emits 104g of CO2 per kilometre; and the European car industry has recently been given a target to achieve 130g of CO2 per kilometre.
The design will contain a number of key features to make it radically more environmentally efficient:
Rear-mounted “open-rotor” engines offer unrivalled environmental performance for short-haul flying due to their higher propulsive efficiency. However, there are significant difficulties in fixing such a large engine under a wing of a narrow-body aircraft, making rear-mounting of the engines the optimum solution
A lower design cruise speed to reduce drag and a shorter design range to reduce weight
Noise reductions are expected to come from a gear box between the engine and the open-rotor blades keeping them subsonic during take-off and landing, the use of the rear empennage to shield the ground from engine noise, and airframe improvements (such as no slats on the front of the wing)
The airframe will be made of advanced weight-reducing materials similar to those used in current projects like the Boeing 787, which itself is estimated to be 27% more fuel efficient than the aircraft it will replace in many fleets
Even as global demand for air travel matures over time, several step-changes in technology will be needed to reduce the emissions from aviation in 2050 to below 2005 levels. The “easyJet ecoJet” will be the first of these step changes and alone could lead to a stabilisation of emissions from short-haul aviation at 2005 levels until 2035 providing massive environmental benefits.
A4