Print 18 comment(s) - last by EJ257.. on Jun 25 at 8:36 AM

The goal is to reduce noise and fuel consumption

Over the last year, the commercial and military aviation industry has started to talk a lot about greener aircraft and biofuel to reduce the need for crude oil and produce less pollution. Much of the news focuses on biofuels that reduce the need for traditional petroleum based jet fuel, but there are other technologies at work in the airline industry to make aircraft produce less pollution.

The industry isn't only talking about producing less pollution in the way of hydrocarbons, but in less noise pollution with quieter aircraft. Boeing has announced that American Airlines will be the first company to test a new Boeing 737-800 jet that will use new technology to make it more efficient and produce less noise.

"We are proud to have American Airlines as our launch partner for this new generation of technology that can bolster aviation's role as the most efficient means of global transportation," said Boeing Vice President of Environment and Aviation Policy Billy Glover. "There's no better way to prepare advanced technologies for market entry than flying them and no better choice than the best selling single-aisle airplane of all time -- the Boeing Next-Generation 737."

The American 737-800 will be the first plane to use the new technology including adaptable trailing edge technology that is part of the FAA Continuous Lower Energy Emissions Noise or CLEEN program. The trailing edge tech will reduce noise and emissions in all phases of flight including takeoff, cruise, and landing.

Other CLEEN program tech that will be in the aircraft includes a variable fan nozzle to reduce noise and enable other advanced efficiency tech to be implemented. The aircraft will use a flight trajectory optimization system to pick the most fuel-efficient path to a destination. The aircraft will also has regenerative fuel cells onboard for power that could potentially reduce weight, fuel burn, and CO2 emissions.

"Our ecoDemonstrator flight test program allows us to accelerate promising technologies and move them onto airplane models and into new aircraft design considerations across the industry," said Boeing ecoDemonstrator Program Manager David Akiyama. "It also allows us to verify airplane applicability and identify and eliminate potential integration challenges."

American Airlines will also test a dual isle aircraft that is unnamed at this time. The testing on the other aircraft will start later. The American Airlines 737-800 with the new tech onboard will start operations in 2012.

Comments     Threshold

This article is over a month old, voting and posting comments is disabled

RE: Numbers?
By Amiga500 on 6/24/2011 2:04:12 PM , Rating: 2

From what I understand Boeing can fit the Leap-X with a mod to the nose gear (still not a small undertaking).

But the GTF requires a nose + main gear mod (a big deal).

Both engines will obviously require mods to the pylon and wing spars, probably wingbox and possibly the inboard wing ribs & skin/stringers.

Hence why Boeing are taking so long to decide - it is a much harder undertaking for them than Airbus. But I'm still convinced they have no option - if they do a clean slate now, they'll need to do another in 10 years time when propfans are mature enough to go onto aircraft. A 25-40% reduction in sfc from propfans simply cannot be ignored. Boeing will have to re-engine the 737 IMO.

RE: Numbers?
By Ringold on 6/24/2011 4:49:12 PM , Rating: 2
Would you be able to point out the key difference between a turboprop and propfan? A propfan looks like a slightly rearranged turboprop to my lay eyes, but it is very interesting.

RE: Numbers?
By Amiga500 on 6/25/2011 6:50:28 AM , Rating: 3
Broadly speaking, it sort of is.

However, a propfan can also form part of the inner engine core's compressive stages (for a tractor unit), or be directly linked to the turbine stages (for a pusher unit). A turboprop will tend not to do this - it'll use a gearbox to adjust rotation speeds.

A propfan with thus spin at much higher speeds, but due to the swept tips, still operates effectively. Here is graph of propulsive efficiency of the different types of engines.

I see some internet sites claiming that the distinction is that the exhaust of a turboprop is not used for additional propulsion - that is completely untrue.

"I'm an Internet expert too. It's all right to wire the industrial zone only, but there are many problems if other regions of the North are wired." -- North Korean Supreme Commander Kim Jong-il

Most Popular Articles5 Cases for iPhone 7 and 7 iPhone Plus
September 18, 2016, 10:08 AM
No More Turtlenecks - Try Snakables
September 19, 2016, 7:44 AM
ADHD Diagnosis and Treatment in Children: Problem or Paranoia?
September 19, 2016, 5:30 AM
Walmart may get "Robot Shopping Carts?"
September 17, 2016, 6:01 AM
Automaker Porsche may expand range of Panamera Coupe design.
September 18, 2016, 11:00 AM

Copyright 2016 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki