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Trimeresurus
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Why is the distance between 77W cockpit and the first row seat so long?

Sat Jan 16, 2021 6:43 pm

For example here, you can see that there's quite a bit of space between where the cockpit door supposedly is, and the start of the passenger seats. Is there a crew rest in that area? A crew laboratory? Or just electronic equipment?

I never saw a photo or a video of that space, where cockpit door opens into, of a 777-300ER. Can anyone link it?
 
N965UW
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sat Jan 16, 2021 11:35 pm

Most, if not all airlines have lavs and/or galleys between the first set of doors and the flight deck. (QR has both, as shown on their 77W seat maps.) Also worth noting that the 777 fuselage tapers aggressively in this region. The 777's body is WIDE, and that quickly narrows down from nearly full width at the L/R1 doors to streamlined nose cone at the front. I'm no engineer but I suppose the length is necessary to allow for such a fast rate of taper. The flight deck itself is also quite spacious, with room for full-size jumpseats.
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e38
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sat Jan 16, 2021 11:49 pm

A crew laboratory?

you mean like a space for the crew to perform experiments and conduct research?

e38
 
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Starlionblue
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 1:00 am

You can't have any seats in front of the number 1 doors, which means you have to put other stuff there.

There are lavatories and a big galley there. And yes, typically a crew rest entrance. However, the crew rest itself is in the crown so doesn't take up a lot of floor space.


If you search for seat maps you can check out some layouts. Most seat maps are a bit stylised but some are more true to life.

Image

N965UW wrote:
Most, if not all airlines have lavs and/or galleys between the first set of doors and the flight deck. (QR has both, as shown on their 77W seat maps.) Also worth noting that the 777 fuselage tapers aggressively in this region. The 777's body is WIDE, and that quickly narrows down from nearly full width at the L/R1 doors to streamlined nose cone at the front. I'm no engineer but I suppose the length is necessary to allow for such a fast rate of taper. The flight deck itself is also quite spacious, with room for full-size jumpseats.


The A350 is almost as wide, and for the same reason, there's quite a bit of length between the nose and the first row. The cockpit is also quite a bit "longer" than a 777 cockpit.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
B6JFKH81
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 2:31 am

If I recall a documentary I saw years ago correctly, the cockpit section of the 777 is the same as the 767 (which has a smaller fuselage diameter) so the had to add a larger "neck" section to transition to the larger fuselage. Correct me if I'm wrong but I think it is "section 16". Am I remembering this right?
"If you do not learn from history, you are doomed to repeat it"
 
Trimeresurus
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 6:24 am

e38 wrote:
A crew laboratory?

you mean like a space for the crew to perform experiments and conduct research?

e38


Ha :rotfl:

Lavatory.
 
stratclub
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 10:35 am

B6JFKH81 wrote:
If I recall a documentary I saw years ago correctly, the cockpit section of the 777 is the same as the 767 (which has a smaller fuselage diameter) so the had to add a larger "neck" section to transition to the larger fuselage. Correct me if I'm wrong but I think it is "section 16". Am I remembering this right?

That is correct. IDK about the section 16 reference. My assumption is that the transition plug is part of the 43 section.
 
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WesternDC6B
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 3:53 pm

Trimeresurus wrote:
e38 wrote:
A crew laboratory?

you mean like a space for the crew to perform experiments and conduct research?

e38


Ha :rotfl:

Lavatory.


They WERE laborador-ies, but every time the labs started to bark, passengers thought they had stepped onto an A320 and do were on the wrong flight. :duck:
Never employ grandios verbiage when the utilisation of diminutive phraseology will suffice.
 
B6JFKH81
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 4:51 pm

stratclub wrote:
B6JFKH81 wrote:
If I recall a documentary I saw years ago correctly, the cockpit section of the 777 is the same as the 767 (which has a smaller fuselage diameter) so the had to add a larger "neck" section to transition to the larger fuselage. Correct me if I'm wrong but I think it is "section 16". Am I remembering this right?

That is correct. IDK about the section 16 reference. My assumption is that the transition plug is part of the 43 section.


43 rings a bell too and is correct I think, not sure what 16 was for. Hard to believe I watched that documentary 20 years ago in aircraft design class in college! How time flies (pun completely intended LOL)!
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Horstroad
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Sun Jan 17, 2021 5:18 pm

stratclub wrote:
B6JFKH81 wrote:
If I recall a documentary I saw years ago correctly, the cockpit section of the 777 is the same as the 767 (which has a smaller fuselage diameter) so the had to add a larger "neck" section to transition to the larger fuselage. Correct me if I'm wrong but I think it is "section 16". Am I remembering this right?

That is correct. IDK about the section 16 reference. My assumption is that the transition plug is part of the 43 section.

Section 43 is a constant section of the fuselage between the fwd lower cargo door and the center wing box. Between STA 655 and STA 1035 to be precise. Not sure what the cockpit section is called, but it's part of section 41. The cockpit is between STA 126.5 and 246. The tapered section extends to approximately STA 470 on the top side of the fuselage and to approximately 450 on the bottom.

Image


for comparison, section 41 of the 767:

Image
 
B6JFKH81
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Re: Why is the distance between 77W cockpit and the first row seat so long?

Mon Jan 18, 2021 12:45 am

Thank you Horstroad! That helps greatly in visualizing the differences!!!
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