Why would one plane in this picture not have gear down yet?
$begingroup$
This image was posted in another question:
I noticed that the lead twin (737?) has gear down, the 747 behind does not (appear to) have gear down, but the third plane in line (another twin) does have gear down as well.
Why would the 747 not be gear down at this point?
landing landing-gear
asked 4 hours ago
FreeManFreeMan
7,0731055123
$endgroup$
add a comment |
$begingroup$
This image was posted in another question:
I noticed that the lead twin (737?) has gear down, the 747 behind does not (appear to) have gear down, but the third plane in line (another twin) does have gear down as well.
Why would the 747 not be gear down at this point?
landing landing-gear
asked 4 hours ago
FreeManFreeMan
7,0731055123
$endgroup$
3
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
4
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago
add a comment |
$begingroup$
This image was posted in another question:
I noticed that the lead twin (737?) has gear down, the 747 behind does not (appear to) have gear down, but the third plane in line (another twin) does have gear down as well.
Why would the 747 not be gear down at this point?
landing landing-gear
asked 4 hours ago
FreeManFreeMan
7,0731055123
$endgroup$
This image was posted in another question:
I noticed that the lead twin (737?) has gear down, the 747 behind does not (appear to) have gear down, but the third plane in line (another twin) does have gear down as well.
Why would the 747 not be gear down at this point?
landing landing-gear
landing landing-gear
asked 4 hours ago
FreeManFreeMan
7,0731055123
asked 4 hours ago
FreeManFreeMan
7,0731055123
edited 1 hour ago
FreeMan
asked 4 hours ago
FreeManFreeMan
7,0731055123
asked 4 hours ago
FreeManFreeMan
7,0731055123
asked 4 hours ago
FreeManFreeMan
7,0731055123
7,0731055123
3
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
4
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago
add a comment |
3
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
4
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago
3
3
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
4
4
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
Why does the 747 not have its gear down yet?
Based on the image it is hard to day how far these aircraft are from the runway. The 747 could still be be quite far from the runway and thus does not need to have its gear down yet.
The 747-400 FCOM (NP.21.47 Normal Procedures) says:
At glideslope alive, call:
- "GEAR DOWN"
- "FLAPS 20"
It looks like the 747 in the picture has already intercepted the glideslope, but this is hard to say from this perspective. Also, operators may have different rules for when to lower the gear.
Then why does the third aircraft already have its gear down?
The most probable reason for this is drag. A flight crew may choose to lower the gear earlier than necessary to reduce its speed. ATC could have instructed this aircraft to fly at a lower speed for spacing and the crew then dropped the gear, which adds significant drag. This is pure speculation, of course.
answered 4 hours ago
BianfableBianfable
1,053217
$endgroup$
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
add a comment |
$begingroup$
Larger plane more drag on the wheels perhaps? I'm only guessing, but it would make sense to me, the larger size of the second plane would mean there was already extra drag on it compared to the smaller planes, and lowering the gear too soon might have reduced their air speed by too much.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
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2 Answers
2
active
oldest
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2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Why does the 747 not have its gear down yet?
Based on the image it is hard to day how far these aircraft are from the runway. The 747 could still be be quite far from the runway and thus does not need to have its gear down yet.
The 747-400 FCOM (NP.21.47 Normal Procedures) says:
At glideslope alive, call:
- "GEAR DOWN"
- "FLAPS 20"
It looks like the 747 in the picture has already intercepted the glideslope, but this is hard to say from this perspective. Also, operators may have different rules for when to lower the gear.
Then why does the third aircraft already have its gear down?
The most probable reason for this is drag. A flight crew may choose to lower the gear earlier than necessary to reduce its speed. ATC could have instructed this aircraft to fly at a lower speed for spacing and the crew then dropped the gear, which adds significant drag. This is pure speculation, of course.
answered 4 hours ago
BianfableBianfable
1,053217
$endgroup$
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
add a comment |
$begingroup$
Why does the 747 not have its gear down yet?
Based on the image it is hard to day how far these aircraft are from the runway. The 747 could still be be quite far from the runway and thus does not need to have its gear down yet.
The 747-400 FCOM (NP.21.47 Normal Procedures) says:
At glideslope alive, call:
- "GEAR DOWN"
- "FLAPS 20"
It looks like the 747 in the picture has already intercepted the glideslope, but this is hard to say from this perspective. Also, operators may have different rules for when to lower the gear.
Then why does the third aircraft already have its gear down?
The most probable reason for this is drag. A flight crew may choose to lower the gear earlier than necessary to reduce its speed. ATC could have instructed this aircraft to fly at a lower speed for spacing and the crew then dropped the gear, which adds significant drag. This is pure speculation, of course.
answered 4 hours ago
BianfableBianfable
1,053217
$endgroup$
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
add a comment |
$begingroup$
Why does the 747 not have its gear down yet?
Based on the image it is hard to day how far these aircraft are from the runway. The 747 could still be be quite far from the runway and thus does not need to have its gear down yet.
The 747-400 FCOM (NP.21.47 Normal Procedures) says:
At glideslope alive, call:
- "GEAR DOWN"
- "FLAPS 20"
It looks like the 747 in the picture has already intercepted the glideslope, but this is hard to say from this perspective. Also, operators may have different rules for when to lower the gear.
Then why does the third aircraft already have its gear down?
The most probable reason for this is drag. A flight crew may choose to lower the gear earlier than necessary to reduce its speed. ATC could have instructed this aircraft to fly at a lower speed for spacing and the crew then dropped the gear, which adds significant drag. This is pure speculation, of course.
answered 4 hours ago
BianfableBianfable
1,053217
$endgroup$
Why does the 747 not have its gear down yet?
Based on the image it is hard to day how far these aircraft are from the runway. The 747 could still be be quite far from the runway and thus does not need to have its gear down yet.
The 747-400 FCOM (NP.21.47 Normal Procedures) says:
At glideslope alive, call:
- "GEAR DOWN"
- "FLAPS 20"
It looks like the 747 in the picture has already intercepted the glideslope, but this is hard to say from this perspective. Also, operators may have different rules for when to lower the gear.
Then why does the third aircraft already have its gear down?
The most probable reason for this is drag. A flight crew may choose to lower the gear earlier than necessary to reduce its speed. ATC could have instructed this aircraft to fly at a lower speed for spacing and the crew then dropped the gear, which adds significant drag. This is pure speculation, of course.
answered 4 hours ago
BianfableBianfable
1,053217
answered 4 hours ago
BianfableBianfable
1,053217
answered 4 hours ago
BianfableBianfable
1,053217
answered 4 hours ago
BianfableBianfable
1,053217
1,053217
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
add a comment |
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
3
3
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
$begingroup$
I second these assumptions based on knowing the approach procedures at the airfield in question (EGLL) and some familiarity with SOPs for at least one airline/type combination pictured here.
$endgroup$
– Cpt Reynolds
3 hours ago
add a comment |
$begingroup$
Larger plane more drag on the wheels perhaps? I'm only guessing, but it would make sense to me, the larger size of the second plane would mean there was already extra drag on it compared to the smaller planes, and lowering the gear too soon might have reduced their air speed by too much.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Larger plane more drag on the wheels perhaps? I'm only guessing, but it would make sense to me, the larger size of the second plane would mean there was already extra drag on it compared to the smaller planes, and lowering the gear too soon might have reduced their air speed by too much.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Larger plane more drag on the wheels perhaps? I'm only guessing, but it would make sense to me, the larger size of the second plane would mean there was already extra drag on it compared to the smaller planes, and lowering the gear too soon might have reduced their air speed by too much.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Larger plane more drag on the wheels perhaps? I'm only guessing, but it would make sense to me, the larger size of the second plane would mean there was already extra drag on it compared to the smaller planes, and lowering the gear too soon might have reduced their air speed by too much.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 57 mins ago
AndyAndy
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 57 mins ago
AndyAndy
11
answered 57 mins ago
AndyAndy
11
11
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Andy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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3
$begingroup$
FYIW the twin in the front is an Airbus (318-A321)
$endgroup$
– DeepSpace
4 hours ago
$begingroup$
As for the question itself, I believe that the timing to lower the gear is part of an airline SOP. For example, some airlines dictate to lower the gear only after the aircraft is established on the glideslope (in case of an ILS landing)
$endgroup$
– DeepSpace
4 hours ago
4
$begingroup$
There is a 75% chance @Terry sees this meaning there is a 98% chance he has the answer and a 0.001% chance it was him flying that 747...
$endgroup$
– Dave
3 hours ago
$begingroup$
@DeepSpace It looked like the engine nacel's were flattened on the bottom, hence my 737 guess.
$endgroup$
– FreeMan
1 hour ago