Why are the 737's rear doors unusable in a water landing?Why evacuate wing at the front side after water landing?Can water landing be simulated?Why is the rear seat ejected before the front one?Why are 737-200 engines more susceptible to separation?Why evacuate wing at the front side after water landing?Are tail strike landings preferable for an emergency landing on water?Why Boeing 737 main landing gear wells have no doors?Why would landing the space shuttle on water have been unsurvivable?Why do the 737-100/200’s thrust reversers blow fully open if hydraulic pressure is removed while the reversers are partly open?Why do newer 737s use two different styles of split winglets?Why can’t more older 737s be retrofitted with more newer winglets?
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Why are the 737's rear doors unusable in a water landing?
Why evacuate wing at the front side after water landing?Can water landing be simulated?Why is the rear seat ejected before the front one?Why are 737-200 engines more susceptible to separation?Why evacuate wing at the front side after water landing?Are tail strike landings preferable for an emergency landing on water?Why Boeing 737 main landing gear wells have no doors?Why would landing the space shuttle on water have been unsurvivable?Why do the 737-100/200’s thrust reversers blow fully open if hydraulic pressure is removed while the reversers are partly open?Why do newer 737s use two different styles of split winglets?Why can’t more older 737s be retrofitted with more newer winglets?
$begingroup$
The 737's rear exit doors cannot be used to evacuate the aircraft in the event of a water landing, as shown, for example, in this safety card:
(Image from flight-report, via Jordy here at AvSE.)
In contrast, the rear doors on (for instance) the A320 series can be used for a water evacuation:
(Image by Czechnology here at AvSE.)
Why can't the 737's rear doors be used during a water landing?
boeing-737 evacuation ditching
$endgroup$
add a comment |
$begingroup$
The 737's rear exit doors cannot be used to evacuate the aircraft in the event of a water landing, as shown, for example, in this safety card:
(Image from flight-report, via Jordy here at AvSE.)
In contrast, the rear doors on (for instance) the A320 series can be used for a water evacuation:
(Image by Czechnology here at AvSE.)
Why can't the 737's rear doors be used during a water landing?
boeing-737 evacuation ditching
$endgroup$
13
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
12
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
12
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
6
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
1
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13
add a comment |
$begingroup$
The 737's rear exit doors cannot be used to evacuate the aircraft in the event of a water landing, as shown, for example, in this safety card:
(Image from flight-report, via Jordy here at AvSE.)
In contrast, the rear doors on (for instance) the A320 series can be used for a water evacuation:
(Image by Czechnology here at AvSE.)
Why can't the 737's rear doors be used during a water landing?
boeing-737 evacuation ditching
$endgroup$
The 737's rear exit doors cannot be used to evacuate the aircraft in the event of a water landing, as shown, for example, in this safety card:
(Image from flight-report, via Jordy here at AvSE.)
In contrast, the rear doors on (for instance) the A320 series can be used for a water evacuation:
(Image by Czechnology here at AvSE.)
Why can't the 737's rear doors be used during a water landing?
boeing-737 evacuation ditching
boeing-737 evacuation ditching
asked Apr 4 at 0:28
SeanSean
5,89232872
5,89232872
13
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
12
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
12
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
6
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
1
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13
add a comment |
13
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
12
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
12
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
6
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
1
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13
13
13
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
12
12
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
12
12
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
6
6
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
1
1
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
The bottom of the door opening sits too close to, or below, the water line when the airplane is floating.
$endgroup$
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
add a comment |
$begingroup$
It all goes back to how the aircraft is designed; the ways different planes float vary.
when the 737 ditches on water the tail-section of the plane is deeper in the water than front of it, because the wings are a huge floating point and support most of the weight of the aircraft when afloat, and the bigger front of the airplane contains more air so when floating it will be lighter hence pitching the nose up, causing the tail and the rear doors to be below or very close to the water. this is why these doors remain shut in the event of evacuating after an emergency water landing so that water doesn't get in any faster, giving the plane and its passengers and the crew more time to evacuate and stay afloat longer until help arrives.
New contributor
$endgroup$
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
|
show 6 more comments
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The bottom of the door opening sits too close to, or below, the water line when the airplane is floating.
$endgroup$
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
add a comment |
$begingroup$
The bottom of the door opening sits too close to, or below, the water line when the airplane is floating.
$endgroup$
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
add a comment |
$begingroup$
The bottom of the door opening sits too close to, or below, the water line when the airplane is floating.
$endgroup$
The bottom of the door opening sits too close to, or below, the water line when the airplane is floating.
answered Apr 4 at 0:34
John KJohn K
24.6k13674
24.6k13674
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
add a comment |
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
$begingroup$
Comments are not for extended discussion; this conversation has been moved to chat.
$endgroup$
– Jamiec♦
Apr 5 at 12:37
add a comment |
$begingroup$
It all goes back to how the aircraft is designed; the ways different planes float vary.
when the 737 ditches on water the tail-section of the plane is deeper in the water than front of it, because the wings are a huge floating point and support most of the weight of the aircraft when afloat, and the bigger front of the airplane contains more air so when floating it will be lighter hence pitching the nose up, causing the tail and the rear doors to be below or very close to the water. this is why these doors remain shut in the event of evacuating after an emergency water landing so that water doesn't get in any faster, giving the plane and its passengers and the crew more time to evacuate and stay afloat longer until help arrives.
New contributor
$endgroup$
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
|
show 6 more comments
$begingroup$
It all goes back to how the aircraft is designed; the ways different planes float vary.
when the 737 ditches on water the tail-section of the plane is deeper in the water than front of it, because the wings are a huge floating point and support most of the weight of the aircraft when afloat, and the bigger front of the airplane contains more air so when floating it will be lighter hence pitching the nose up, causing the tail and the rear doors to be below or very close to the water. this is why these doors remain shut in the event of evacuating after an emergency water landing so that water doesn't get in any faster, giving the plane and its passengers and the crew more time to evacuate and stay afloat longer until help arrives.
New contributor
$endgroup$
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
|
show 6 more comments
$begingroup$
It all goes back to how the aircraft is designed; the ways different planes float vary.
when the 737 ditches on water the tail-section of the plane is deeper in the water than front of it, because the wings are a huge floating point and support most of the weight of the aircraft when afloat, and the bigger front of the airplane contains more air so when floating it will be lighter hence pitching the nose up, causing the tail and the rear doors to be below or very close to the water. this is why these doors remain shut in the event of evacuating after an emergency water landing so that water doesn't get in any faster, giving the plane and its passengers and the crew more time to evacuate and stay afloat longer until help arrives.
New contributor
$endgroup$
It all goes back to how the aircraft is designed; the ways different planes float vary.
when the 737 ditches on water the tail-section of the plane is deeper in the water than front of it, because the wings are a huge floating point and support most of the weight of the aircraft when afloat, and the bigger front of the airplane contains more air so when floating it will be lighter hence pitching the nose up, causing the tail and the rear doors to be below or very close to the water. this is why these doors remain shut in the event of evacuating after an emergency water landing so that water doesn't get in any faster, giving the plane and its passengers and the crew more time to evacuate and stay afloat longer until help arrives.
New contributor
New contributor
answered Apr 4 at 1:56
AndroidSmoker74AndroidSmoker74
23910
23910
New contributor
New contributor
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
|
show 6 more comments
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
2
2
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
$begingroup$
"[T]he bigger front of the airplane contains more air so when floating it will be lighter" and, by the same argument, a big empty box weighs less than a small empty box because it contains more air! You've forgotten that the bigger container also has bigger walls, which weigh more.
$endgroup$
– David Richerby
Apr 4 at 10:23
2
2
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
$begingroup$
@DavidRicherby You're forgetting the square-cube law.
$endgroup$
– Katastic Voyage
Apr 4 at 12:03
2
2
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
$begingroup$
@DavidRicherby - Yes, bigger empty boxes weight less than smaller empty boxes when both are submerged in water.
$endgroup$
– Pere
Apr 4 at 15:18
3
3
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
$begingroup$
@DavidRicherby You are the one introducing the interpretation of "lighter" in the answer as meaning less weight rather than more buoyancy. The answer did not say the former, and clearly meant the latter. If you really want to nitpick, it is the wording, not the concept.
$endgroup$
– Backgammon
Apr 4 at 17:12
1
1
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
$begingroup$
@DavidRicherby, the tail is a pointy cone with a bunch of thin bits of metal sticking off of it. It's got a lot of metal and only a little air. The nose is a rounded object containing a whole lot of air and only a little metal. It's not surprising that the nose floats higher than the tail.
$endgroup$
– Mark
Apr 4 at 22:17
|
show 6 more comments
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13
$begingroup$
I like the optimism of these "safety cards" showing a pristine aircraft floating nicely on the water after a ditching. Statistically unlikely but makes for a pleasant looking card.
$endgroup$
– Ron Beyer
Apr 4 at 2:55
12
$begingroup$
There was that time a guy with a lot of glider experience landed an airliner in the Hudson River a few years back, after the engines died right after he took off from the airport.
$endgroup$
– nick012000
Apr 4 at 3:55
12
$begingroup$
Yeah, and they couldn't use the rear doors. Know why? They were underwater... This was an A320.
$endgroup$
– Harper
Apr 4 at 4:00
6
$begingroup$
@nick012000 and they call it "The Miracle on the Hudson" for a reason.
$endgroup$
– Arcanist Lupus
Apr 4 at 6:02
1
$begingroup$
Looks like Airbus tell you to check, but Boeing reckon it's not even worth checking. In the one photo I can find of a successful Airbus landing on water, you wouldn't open the rear doors anyway... home.bt.com/images/…
$endgroup$
– Jason
Apr 4 at 7:13