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Posted: 2/24/2016 4:37:18 PM EDT
[#1]
Engines will get overhauled when they reach a certain time it doesn't matter it's position. You may have one engine with twice the time of the other on the plane. On the MD80 we start the left engine because of the nature of the hyd system. Other planes may be different. Same thing with taxing in, we shut down the right engine.
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Posted: 2/24/2016 4:41:44 PM EDT
[#2]
Quote HistoryQuoted:
Engines will get overhauled when they reach a certain time it doesn't matter it's position. You may have one engine with twice the time of the other on the plane. On the MD80 we start the left engine because of the nature of the hyd system. Other planes may be different. Same thing with taxing in, we shut down the right engine. interesting. wouldn't it be more efficient to do both engines when it's pulled from service? NVM. dumb question. 4 years of flying 40+ weeks a year has shown me the airlines don't give a shit about efficiency nor common sense. Posted Via AR15.Com Mobile |
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Posted: 2/24/2016 4:43:31 PM EDT
[#3]
It depends on the company. Some companies taxi out on one engine more than others then ask where to do a cross bleed start on their way out to the runways. Some will taxi out o n one engine if they know they're going to be sitting for a while waiting for a flow/EDCT time then ask for a heads up so they can get both ready when it's go time.
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Posted: 2/24/2016 4:44:32 PM EDT
[#4]
The time between overhauls for a turbine engine on an airliner is tens of thousands of hours. Idling an engine unnecessarily burns a lot of gas, so many operators avoid it if possible.
Even for maintenance taxis, we usually only have one engine running, unless the weather conditions are bad or we are taking it to an engine run-up pad to pull more power. |
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Posted: 2/24/2016 4:44:45 PM EDT
[#5]
They have another engine waiting and just swap it out. They can change an engine really fast.
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Posted: 2/24/2016 4:48:57 PM EDT
[#6]
Why does the Dash 8 use one engine for takeoff?
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Posted: 2/24/2016 4:50:25 PM EDT
[#7]
Quote HistoryQuoted: wouldn't it be more efficient to do both engines when it's pulled from service? 4 years of flying 40+ weeks a year has shown me the airlines don't give a shit about efficiency nor common sense. For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. |
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Posted: 2/24/2016 4:52:32 PM EDT
[#8]
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Why does the Dash 8 use one engine for takeoff? I read somewhere that all modern commercial jets are capable of single engine take offs with typical load of passengers and cargo/fuel. not sure it's true but makes sense in case of a blown motor during take off. Posted Via AR15.Com Mobile |
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Posted: 2/24/2016 4:54:32 PM EDT
[#9]
Quote HistoryQuoted:
For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. Quote HistoryQuoted:
Quoted:
wouldn't it be more efficient to do both engines when it's pulled from service? 4 years of flying 40+ weeks a year has shown me the airlines don't give a shit about efficiency nor common sense. For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. raleigh to Newark via midway makes no sense. Posted Via AR15.Com Mobile |
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Posted: 2/24/2016 5:01:29 PM EDT
[#10]
Quote HistoryQuoted:
On a Boeing 737, it takes three or four mechanics about 8 hours to change an engine. The airplane is brought into the hangar in the evening, the old engine gets pulled off and a new one gets put on. The airplane may well be out flying people around the next morning. For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. Quote HistoryQuoted:
Quoted:
wouldn't it be more efficient to do both engines when it's pulled from service? 4 years of flying 40+ weeks a year has shown me the airlines don't give a shit about efficiency nor common sense. For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. 03, you have no idea how efficient the Airlines are. Decades cut throat competition since "deregulation" has forced them to raise efficiency to an Art, and a science. Common sense, yeah, that's not always evident. Even from within the belly of the beast, we often can't see the big picture. For you to think you've somehow absorbed special insight from sitting in 32B? Well, that's just silly. |
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Posted: 2/24/2016 5:02:54 PM EDT
[#11]
Quote HistoryQuoted: raleigh to Newark via midway makes no sense. Quote HistoryQuoted: Quoted: Quoted: wouldn't it be more efficient to do both engines when it's pulled from service? 4 years of flying 40+ weeks a year has shown me the airlines don't give a shit about efficiency nor common sense. For the most part, efficiency=money, and they do care about it quite a bit. The two or three hour snippet of time that you spend on the plane is just a fraction of the story. raleigh to Newark via midway makes no sense. |
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Posted: 2/24/2016 5:08:10 PM EDT
[#12]
Quote HistoryQuoted:
I read somewhere that all modern commercial jets are capable of single engine take offs with typical load of passengers and cargo/fuel. not sure it's true but makes sense in case of a blown motor during take off. Posted Via AR15.Com Mobile Quote HistoryQuoted:
Quoted:
Why does the Dash 8 use one engine for takeoff? I read somewhere that all modern commercial jets are capable of single engine take offs with typical load of passengers and cargo/fuel. not sure it's true but makes sense in case of a blown motor during take off. Posted Via AR15.Com Mobile It's called V1. About 130-155 mph. Lose an engine above that, and you're still going flying. Much below that, and the full power engine will swerve you off the runway, if you don't pull it back pdq. Given a long enough runway, and a light enough airplane, some could probably accelerate slowly to V1 and take off with one engine. But it isn't something we practice, for obvious reasons. |
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Posted: 2/24/2016 6:35:27 PM EDT
[#13]
It's way fun to see B-52's injected water black smoke take-offs
 watching them from a taxiway on a 12,000 ft plus runway in a crash & rescue fire truck . not only was it ear popping it would shake your chest,,,,, and when they scrambled six in a row...... it left you proud that America built that.......
Seen a lot of .. off debark side engines left running on many military aircraft |
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Posted: 2/24/2016 6:39:56 PM EDT
[#14]
Quote HistoryQuoted:
Why does the Dash 8 use one engine for takeoff? As opposed to not using it for takeoff? Seriously though, the Dash 8 uses both engines for takeoff. Mike E-9A |
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Posted: 2/24/2016 7:47:48 PM EDT
[#15]
Quote HistoryQuoted:
As opposed to not using it for takeoff? Seriously though, the Dash 8 uses both engines for takeoff. Mike E-9A Quote HistoryQuoted:
Quoted:
Why does the Dash 8 use one engine for takeoff? As opposed to not using it for takeoff? Seriously though, the Dash 8 uses both engines for takeoff. Mike E-9A This. I've seen a lot of Dash 8s depart |
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