AA777223 From United States of America, joined Feb 2006, 1182 posts, RR: 7 Reply 3, posted (4 years 9 months 1 week 2 days 4 hours ago) and read 2728 times:
I think it is just engaging reverse thrust. When the engine does this, the back half (or so) of the engine cowling slides back, to allow the thrust to exit. You can tell this by looking at the exhaust vane whihc is covered much more by the engine cowling than on other 737s. This is all that is happening here. Next time you land in an aircraft, watch for it, and you'll see what I'm talking about.
Jorge1812 From Germany, joined Apr 2004, 3148 posts, RR: 8 Reply 6, posted (4 years 9 months 1 week 2 days 4 hours ago) and read 2685 times:
Definately only thrust reverser open b/c airberlin letters are complete only with a gap. If something was missing few letters of airberlin wouldn't be present. I've seen a/c taxiing with t/r very often but not on on a 737 yet.
Heavierthanair From Switzerland, joined Oct 2000, 697 posts, RR: 0 Reply 7, posted (4 years 9 months 1 week 2 days 4 hours ago) and read 2659 times:
A section of the engine cowling has been removed as a weight saving measure. Though this is expected to slightly increase drag the fuel savings are still expected to more than compensate for that. Air Berlin has volunteered to perform the in service trials. If the fuel savings as expected can be realized this will become standard equipment on all new 737 aircraft and a retrofit package will be developed for older in service aircraft. Early taxiing trial are looking promising and first flight tests are imminent. Once the trials are completed Boeing will compensate Air Berlin for the costs of the trials with a free issue 737-800 from an order recently cancelled by another customer.
I am unable to post a link to the story since these trials are not supposed to be made public before patents have been applied for.
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." (Albert Einstein, 1879
Probably overlooked some sarcasm here but this is just an open thrust reverser (no letter missing!.) Also this plane belongs to Germania (ST) and not airberlin so I assume they would at first save costs on their own 737's.
AirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 25 Reply 13, posted (4 years 9 months 1 week 4 hours ago) and read 1603 times:
Quoting AA777223 (Reply 3): When the engine does this, the back half (or so) of the engine cowling slides back, to allow the thrust to exit.
Its not thrust being exited from that point. It is the bypass airflow being blocked by the blocker doors of the cascading thrust reversers from the compressor fan blade (fwd fan). The thrust is still going through the back of the engine. This is a CFM engine.
Just thought I'd point that out.
A Safe Flight Begins With Quality Maintenance On The Ground.