How long to clear the 'suck zone' of a turbofan after start is initiated? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Are engines automatically stopped in an emergency landing?Why are the engines on the MAX and neo prone to bowing?How long can passengers survive after ditching in the ocean?Why is there no alert if shutting down a running engine during flight?How does the shape of the blades on N1 fan on a turbofan generate thrust?How can cargo be jettisoned from a C-124 in flight?What would have happened if the jet engine on my aircraft had ingested caulk from the pavement?Can we eliminate the center tank of large passenger planes?How is risk managed in single engined piston aircraft flights?What's the name of this component of the turbofan engines?How do you maximize an electric engines thrust?Does the P&W F100 turbofan engine of the F-16 really produce this much power?
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How long to clear the 'suck zone' of a turbofan after start is initiated?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)Are engines automatically stopped in an emergency landing?Why are the engines on the MAX and neo prone to bowing?How long can passengers survive after ditching in the ocean?Why is there no alert if shutting down a running engine during flight?How does the shape of the blades on N1 fan on a turbofan generate thrust?How can cargo be jettisoned from a C-124 in flight?What would have happened if the jet engine on my aircraft had ingested caulk from the pavement?Can we eliminate the center tank of large passenger planes?How is risk managed in single engined piston aircraft flights?What's the name of this component of the turbofan engines?How do you maximize an electric engines thrust?Does the P&W F100 turbofan engine of the F-16 really produce this much power?
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I recently found this (IMO funny) picture. All funny and all. But let's make this a real situation.
Let's suppose I see my crush and his BF doing this, and I come with this 'genius' idea (alright, it's anything but a genius idea, but still) to start the engine they are sitting on. And no, I am not nice enough to turn the beacon lights on.
How likely is it that the engine gains enough suction to suck them in without they noticing it in time (considering the fact they need to standup and run for their lives)?
How long does it take for the engine to spool up enough suck a person in?
safety turbofan
edited Mar 27 at 17:16
ymb1
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
$endgroup$
add a comment |
$begingroup$
I recently found this (IMO funny) picture. All funny and all. But let's make this a real situation.
Let's suppose I see my crush and his BF doing this, and I come with this 'genius' idea (alright, it's anything but a genius idea, but still) to start the engine they are sitting on. And no, I am not nice enough to turn the beacon lights on.
How likely is it that the engine gains enough suction to suck them in without they noticing it in time (considering the fact they need to standup and run for their lives)?
How long does it take for the engine to spool up enough suck a person in?
safety turbofan
edited Mar 27 at 17:16
ymb1
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
$endgroup$
13
$begingroup$
I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
$endgroup$
– FreeMan
Mar 27 at 17:47
1
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Since they are both wearing ties, one would hope that'd get sucked into the core.
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– MikeY
Mar 27 at 20:28
11
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Ironically, that looks like an A320, but the start panel is from a B737.
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– Bianfable
Mar 28 at 8:36
12
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That picture's totally inappropriate for this site. Who starts engine 1 first!?
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– 0xdd
Mar 28 at 14:56
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@0xdd Cause that's the engine they are sitting on!
$endgroup$
– Hugo Woesthuis
Mar 30 at 14:53
add a comment |
$begingroup$
I recently found this (IMO funny) picture. All funny and all. But let's make this a real situation.
Let's suppose I see my crush and his BF doing this, and I come with this 'genius' idea (alright, it's anything but a genius idea, but still) to start the engine they are sitting on. And no, I am not nice enough to turn the beacon lights on.
How likely is it that the engine gains enough suction to suck them in without they noticing it in time (considering the fact they need to standup and run for their lives)?
How long does it take for the engine to spool up enough suck a person in?
safety turbofan
edited Mar 27 at 17:16
ymb1
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
$endgroup$
I recently found this (IMO funny) picture. All funny and all. But let's make this a real situation.
Let's suppose I see my crush and his BF doing this, and I come with this 'genius' idea (alright, it's anything but a genius idea, but still) to start the engine they are sitting on. And no, I am not nice enough to turn the beacon lights on.
How likely is it that the engine gains enough suction to suck them in without they noticing it in time (considering the fact they need to standup and run for their lives)?
How long does it take for the engine to spool up enough suck a person in?
safety turbofan
safety turbofan
edited Mar 27 at 17:16
ymb1
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
edited Mar 27 at 17:16
ymb1
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
edited Mar 27 at 17:16
ymb1
70.6k7226376
edited Mar 27 at 17:16
ymb1
70.6k7226376
edited Mar 27 at 17:16
ymb1
70.6k7226376
70.6k7226376
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
asked Mar 27 at 15:54
Hugo WoesthuisHugo Woesthuis
1,059924
1,059924
13
$begingroup$
I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
$endgroup$
– FreeMan
Mar 27 at 17:47
1
$begingroup$
Since they are both wearing ties, one would hope that'd get sucked into the core.
$endgroup$
– MikeY
Mar 27 at 20:28
11
$begingroup$
Ironically, that looks like an A320, but the start panel is from a B737.
$endgroup$
– Bianfable
Mar 28 at 8:36
12
$begingroup$
That picture's totally inappropriate for this site. Who starts engine 1 first!?
$endgroup$
– 0xdd
Mar 28 at 14:56
$begingroup$
@0xdd Cause that's the engine they are sitting on!
$endgroup$
– Hugo Woesthuis
Mar 30 at 14:53
add a comment |
13
$begingroup$
I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
$endgroup$
– FreeMan
Mar 27 at 17:47
1
$begingroup$
Since they are both wearing ties, one would hope that'd get sucked into the core.
$endgroup$
– MikeY
Mar 27 at 20:28
11
$begingroup$
Ironically, that looks like an A320, but the start panel is from a B737.
$endgroup$
– Bianfable
Mar 28 at 8:36
12
$begingroup$
That picture's totally inappropriate for this site. Who starts engine 1 first!?
$endgroup$
– 0xdd
Mar 28 at 14:56
$begingroup$
@0xdd Cause that's the engine they are sitting on!
$endgroup$
– Hugo Woesthuis
Mar 30 at 14:53
13
13
$begingroup$
I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
$endgroup$
– FreeMan
Mar 27 at 17:47
$begingroup$
I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
$endgroup$
– FreeMan
Mar 27 at 17:47
1
1
$begingroup$
Since they are both wearing ties, one would hope that'd get sucked into the core.
$endgroup$
– MikeY
Mar 27 at 20:28
$begingroup$
Since they are both wearing ties, one would hope that'd get sucked into the core.
$endgroup$
– MikeY
Mar 27 at 20:28
11
11
$begingroup$
Ironically, that looks like an A320, but the start panel is from a B737.
$endgroup$
– Bianfable
Mar 28 at 8:36
$begingroup$
Ironically, that looks like an A320, but the start panel is from a B737.
$endgroup$
– Bianfable
Mar 28 at 8:36
12
12
$begingroup$
That picture's totally inappropriate for this site. Who starts engine 1 first!?
$endgroup$
– 0xdd
Mar 28 at 14:56
$begingroup$
That picture's totally inappropriate for this site. Who starts engine 1 first!?
$endgroup$
– 0xdd
Mar 28 at 14:56
$begingroup$
@0xdd Cause that's the engine they are sitting on!
$endgroup$
– Hugo Woesthuis
Mar 30 at 14:53
$begingroup$
@0xdd Cause that's the engine they are sitting on!
$endgroup$
– Hugo Woesthuis
Mar 30 at 14:53
add a comment |
3 Answers
3
active
oldest
votes
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(Airbus)
The suck zone ahead of a CFM56 on an A320 is less than 5 meters. The couple have enough time to take a leisurely walk toward the cockpit window.
The engine start time takes upwards of a minute (the starter is limited to four 2-minute bursts, followed by a 15 min cool down). Newer engines take longer to start.
On the neo with PW1000G engines it's 2.9 m. On the A380 it's, surprisingly, only 4.5 m.
How soon can they reunite after a shutdown? It won't be a long wait.
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
$endgroup$
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
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– Stian Yttervik
Mar 28 at 22:29
add a comment |
$begingroup$
A start on a TF all the way to idle is about 20-40 seconds depending on the engine, and the fan itself won't do more than creep a bit until the core actually lights off which is 5-10 seconds, so they'll have lots of time to get down and get away as per @ymb1's diagram, once the wheeEEEEEEEEEEtickticktickticktickticktick starts.
answered Mar 27 at 16:45
John KJohn K
25.8k13878
$endgroup$
23
$begingroup$
I love the written description of the startup sound. +1
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– Pugz
Mar 27 at 18:56
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From now on this is the sound of evil.
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– Peter
Mar 27 at 19:38
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@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
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– John K
Mar 27 at 22:09
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Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
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– reirab
Mar 28 at 16:07
add a comment |
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WHAT??? I CAN'T HEAR YOU
I said, let's get away from this loud engine!
Before it can even start to turn the fan, the noises the engine must make will be so deafening as to force the people in that location to flee.
And even before that, there would be clunks, shakes, and vibration that would be very noticeable, and put even deaf people on notice to clear out.
There would be no mistaking the engine starting up. They would have at least 10-15 seconds to clear out.
answered Mar 27 at 20:06
HarperHarper
4,814926
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2
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This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
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– Clonkex
Mar 29 at 2:09
2
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@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
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– Baldrickk
Mar 29 at 13:12
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Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
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– zymhan
Mar 29 at 14:09
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@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
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– Clonkex
Mar 30 at 23:01
1
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@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
add a comment |
protected by Community♦ Mar 29 at 12:04
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
(Airbus)
The suck zone ahead of a CFM56 on an A320 is less than 5 meters. The couple have enough time to take a leisurely walk toward the cockpit window.
The engine start time takes upwards of a minute (the starter is limited to four 2-minute bursts, followed by a 15 min cool down). Newer engines take longer to start.
On the neo with PW1000G engines it's 2.9 m. On the A380 it's, surprisingly, only 4.5 m.
How soon can they reunite after a shutdown? It won't be a long wait.
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
$endgroup$
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
add a comment |
$begingroup$
(Airbus)
The suck zone ahead of a CFM56 on an A320 is less than 5 meters. The couple have enough time to take a leisurely walk toward the cockpit window.
The engine start time takes upwards of a minute (the starter is limited to four 2-minute bursts, followed by a 15 min cool down). Newer engines take longer to start.
On the neo with PW1000G engines it's 2.9 m. On the A380 it's, surprisingly, only 4.5 m.
How soon can they reunite after a shutdown? It won't be a long wait.
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
$endgroup$
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
add a comment |
$begingroup$
(Airbus)
The suck zone ahead of a CFM56 on an A320 is less than 5 meters. The couple have enough time to take a leisurely walk toward the cockpit window.
The engine start time takes upwards of a minute (the starter is limited to four 2-minute bursts, followed by a 15 min cool down). Newer engines take longer to start.
On the neo with PW1000G engines it's 2.9 m. On the A380 it's, surprisingly, only 4.5 m.
How soon can they reunite after a shutdown? It won't be a long wait.
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
$endgroup$
(Airbus)
The suck zone ahead of a CFM56 on an A320 is less than 5 meters. The couple have enough time to take a leisurely walk toward the cockpit window.
The engine start time takes upwards of a minute (the starter is limited to four 2-minute bursts, followed by a 15 min cool down). Newer engines take longer to start.
On the neo with PW1000G engines it's 2.9 m. On the A380 it's, surprisingly, only 4.5 m.
How soon can they reunite after a shutdown? It won't be a long wait.
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
edited Mar 27 at 21:00
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
answered Mar 27 at 16:40
ymb1ymb1
70.6k7226376
70.6k7226376
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
add a comment |
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
14
14
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
$begingroup$
And, it gets really loud immediately when the starter engages. That'll get your attention right away, followed by the fan starting to turn slowly.
$endgroup$
– Ralph J
Mar 27 at 17:05
2
2
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
$begingroup$
The suction power is massively overrated. If you had hard vacuum in a cylindre, you only need to go 1 diameter away to have negligible suction. But it ramps up nicely inwards from there.
$endgroup$
– Stian Yttervik
Mar 28 at 22:29
add a comment |
$begingroup$
A start on a TF all the way to idle is about 20-40 seconds depending on the engine, and the fan itself won't do more than creep a bit until the core actually lights off which is 5-10 seconds, so they'll have lots of time to get down and get away as per @ymb1's diagram, once the wheeEEEEEEEEEEtickticktickticktickticktick starts.
answered Mar 27 at 16:45
John KJohn K
25.8k13878
$endgroup$
23
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
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@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
$begingroup$
Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
$endgroup$
– reirab
Mar 28 at 16:07
add a comment |
$begingroup$
A start on a TF all the way to idle is about 20-40 seconds depending on the engine, and the fan itself won't do more than creep a bit until the core actually lights off which is 5-10 seconds, so they'll have lots of time to get down and get away as per @ymb1's diagram, once the wheeEEEEEEEEEEtickticktickticktickticktick starts.
answered Mar 27 at 16:45
John KJohn K
25.8k13878
$endgroup$
23
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
$begingroup$
@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
$begingroup$
Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
$endgroup$
– reirab
Mar 28 at 16:07
add a comment |
$begingroup$
A start on a TF all the way to idle is about 20-40 seconds depending on the engine, and the fan itself won't do more than creep a bit until the core actually lights off which is 5-10 seconds, so they'll have lots of time to get down and get away as per @ymb1's diagram, once the wheeEEEEEEEEEEtickticktickticktickticktick starts.
answered Mar 27 at 16:45
John KJohn K
25.8k13878
$endgroup$
A start on a TF all the way to idle is about 20-40 seconds depending on the engine, and the fan itself won't do more than creep a bit until the core actually lights off which is 5-10 seconds, so they'll have lots of time to get down and get away as per @ymb1's diagram, once the wheeEEEEEEEEEEtickticktickticktickticktick starts.
answered Mar 27 at 16:45
John KJohn K
25.8k13878
answered Mar 27 at 16:45
John KJohn K
25.8k13878
answered Mar 27 at 16:45
John KJohn K
25.8k13878
answered Mar 27 at 16:45
John KJohn K
25.8k13878
25.8k13878
23
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
$begingroup$
@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
$begingroup$
Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
$endgroup$
– reirab
Mar 28 at 16:07
add a comment |
23
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
$begingroup$
@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
$begingroup$
Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
$endgroup$
– reirab
Mar 28 at 16:07
23
23
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
I love the written description of the startup sound. +1
$endgroup$
– Pugz
Mar 27 at 18:56
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
$begingroup$
From now on this is the sound of evil.
$endgroup$
– Peter
Mar 27 at 19:38
$begingroup$
@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
$begingroup$
@Peter It's music. Best of all is the sound of a Huey helicopter. youtube.com/watch?v=IA9knzev85I Listen carefully. There must be 4 or 5 ascending howls and groans and whines in a sequence as the, starter, engine and various gearboxes wind up in turn. It's a symphony.
$endgroup$
– John K
Mar 27 at 22:09
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Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
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– reirab
Mar 28 at 16:07
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Hmm... How much suction is the core creating during that 20-40 seconds, though? N2 has to get relatively high before the core lights, doesn't it? Seems like that would still result in a pretty substantial mass flow (though obviously not as much as when the fan spins up.)
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– reirab
Mar 28 at 16:07
add a comment |
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WHAT??? I CAN'T HEAR YOU
I said, let's get away from this loud engine!
Before it can even start to turn the fan, the noises the engine must make will be so deafening as to force the people in that location to flee.
And even before that, there would be clunks, shakes, and vibration that would be very noticeable, and put even deaf people on notice to clear out.
There would be no mistaking the engine starting up. They would have at least 10-15 seconds to clear out.
answered Mar 27 at 20:06
HarperHarper
4,814926
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2
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This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
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– Clonkex
Mar 29 at 2:09
2
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@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
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– Baldrickk
Mar 29 at 13:12
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Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
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– zymhan
Mar 29 at 14:09
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@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
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– Clonkex
Mar 30 at 23:01
1
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@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
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– Harper
Mar 31 at 5:09
add a comment |
$begingroup$
WHAT??? I CAN'T HEAR YOU
I said, let's get away from this loud engine!
Before it can even start to turn the fan, the noises the engine must make will be so deafening as to force the people in that location to flee.
And even before that, there would be clunks, shakes, and vibration that would be very noticeable, and put even deaf people on notice to clear out.
There would be no mistaking the engine starting up. They would have at least 10-15 seconds to clear out.
answered Mar 27 at 20:06
HarperHarper
4,814926
$endgroup$
2
$begingroup$
This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
$endgroup$
– Clonkex
Mar 29 at 2:09
2
$begingroup$
@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
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– Baldrickk
Mar 29 at 13:12
$begingroup$
Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
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– zymhan
Mar 29 at 14:09
$begingroup$
@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
$endgroup$
– Clonkex
Mar 30 at 23:01
1
$begingroup$
@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
add a comment |
$begingroup$
WHAT??? I CAN'T HEAR YOU
I said, let's get away from this loud engine!
Before it can even start to turn the fan, the noises the engine must make will be so deafening as to force the people in that location to flee.
And even before that, there would be clunks, shakes, and vibration that would be very noticeable, and put even deaf people on notice to clear out.
There would be no mistaking the engine starting up. They would have at least 10-15 seconds to clear out.
answered Mar 27 at 20:06
HarperHarper
4,814926
$endgroup$
WHAT??? I CAN'T HEAR YOU
I said, let's get away from this loud engine!
Before it can even start to turn the fan, the noises the engine must make will be so deafening as to force the people in that location to flee.
And even before that, there would be clunks, shakes, and vibration that would be very noticeable, and put even deaf people on notice to clear out.
There would be no mistaking the engine starting up. They would have at least 10-15 seconds to clear out.
answered Mar 27 at 20:06
HarperHarper
4,814926
edited Mar 31 at 5:07
answered Mar 27 at 20:06
HarperHarper
4,814926
answered Mar 27 at 20:06
HarperHarper
4,814926
answered Mar 27 at 20:06
HarperHarper
4,814926
4,814926
2
$begingroup$
This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
$endgroup$
– Clonkex
Mar 29 at 2:09
2
$begingroup$
@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
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– Baldrickk
Mar 29 at 13:12
$begingroup$
Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
$endgroup$
– zymhan
Mar 29 at 14:09
$begingroup$
@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
$endgroup$
– Clonkex
Mar 30 at 23:01
1
$begingroup$
@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
add a comment |
2
$begingroup$
This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
$endgroup$
– Clonkex
Mar 29 at 2:09
2
$begingroup$
@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
$endgroup$
– Baldrickk
Mar 29 at 13:12
$begingroup$
Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
$endgroup$
– zymhan
Mar 29 at 14:09
$begingroup$
@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
$endgroup$
– Clonkex
Mar 30 at 23:01
1
$begingroup$
@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
2
2
$begingroup$
This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
$endgroup$
– Clonkex
Mar 29 at 2:09
$begingroup$
This doesn't actually answer the question. Q: "How long?" A: "Well they'll definitely hear it!"
$endgroup$
– Clonkex
Mar 29 at 2:09
2
2
$begingroup$
@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
$endgroup$
– Baldrickk
Mar 29 at 13:12
$begingroup$
@Clonkex it's implicit that it gets noisy enough, early enough that they would move away because of the noise before they would get sucked in.
$endgroup$
– Baldrickk
Mar 29 at 13:12
$begingroup$
Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
$endgroup$
– zymhan
Mar 29 at 14:09
$begingroup$
Obviously each engine takes a different amount of time to start. The point is that you would always notice it starting up.
$endgroup$
– zymhan
Mar 29 at 14:09
$begingroup$
@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
$endgroup$
– Clonkex
Mar 30 at 23:01
$begingroup$
@Baldrickk Yeah I know, but generally it's expected that Stack Exchange questions should directly answer the question. I'm just suggesting perhaps the author should edit the answer to make it a more direct answer. And of course... I have a cunning plan...
$endgroup$
– Clonkex
Mar 30 at 23:01
1
1
$begingroup$
@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
$begingroup$
@Clonkex ok, there ya go! It's a hard question to answer so I had to couch it...
$endgroup$
– Harper
Mar 31 at 5:09
add a comment |
protected by Community♦ Mar 29 at 12:04
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?
13
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I'm not sure why the VtC for "opinion based". Seems that there are some pretty reliable facts already posted in the answers.
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– FreeMan
Mar 27 at 17:47
1
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Since they are both wearing ties, one would hope that'd get sucked into the core.
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– MikeY
Mar 27 at 20:28
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Ironically, that looks like an A320, but the start panel is from a B737.
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– Bianfable
Mar 28 at 8:36
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That picture's totally inappropriate for this site. Who starts engine 1 first!?
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– 0xdd
Mar 28 at 14:56
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@0xdd Cause that's the engine they are sitting on!
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– Hugo Woesthuis
Mar 30 at 14:53