Questions tagged [boeing-787]
A twin-engine widebody jetliner produced by Boeing since 2007, typically carrying between 242 and 440 passengers. Notable for being the first Boeing jetliner to utilize composites for a large portion of its structure.
104 questions
11
votes
1
answer
2k
views
What is this thin stream coming out from somewhere near the engine?
A friend of mine have recently had a flight from Rome to NYC, on a B-787 (Norse Atlantic), and he noticed this thin stream coming out from somewhere in the engine area, seen in this video. From his ...
- 213
1
vote
3
answers
325
views
By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously?
By using the speed brake do we reduce the speed or do we increase the descent rate or does both happen simultaneously? Could someone please explain the concept
- 409
0
votes
0
answers
60
views
Gear down on climb out [duplicate]
i saw on a live stream from Manchester, that a Virgin A330, left the landing Gear down for 2-3 Minutes after take off, a smiliar scenario i saw on a stream from Heathrow, where British Airways and ...
1
vote
1
answer
755
views
787 Dreamliner - What's the weird "thudding" noise I hear before take-off and landing
Frequent and a maybe-a-little-too-nervous flyer here.
Recently I've been taking the ORD-WAW course with LOT on the 787 Dreamliner and started noticing a sound that's been a little spooky for a person ...
- 113
1
vote
1
answer
523
views
Why some airliners have autostart and others don't?
So some of the more modern FADEC equiped planes (specifically airliners like the 787) have autostart and will self monitor the engines during startup. The one thing that confused me was how a 747 ...
- 6,530
1
vote
1
answer
694
views
Is there any position I can get gps signal on Boeing 787?
As an aviation enthusiast, I use some apps like garmin pilot to capture gps signal on planes to track plane routes.
But I found that I can't get any gps signal on 787. I guess the reason is the ...
- 365
45
votes
1
answer
10k
views
Why did my flight leave the gear down for the first 10 minutes of flight? [duplicate]
This morning, I took flight VS156 from LAS to LHR, aboard a 787, tail number G-VSPY according to flightradar24. The pilot made a strange announcement before takeoff - specifically, that due to a ...
- 483
1
vote
1
answer
285
views
Does the 787 vertical stabilizer have a connection fairing?
In general, a vertical stabilizer connected with the fuselage will form junctions. The junctions trigger a mix of airstreams, and causes interference drag. A fairing is used the ease the sharp ...
- 435
7
votes
3
answers
1k
views
United’s 787-9 upgrade [duplicate]
I read this article about United increasing their performance of the 787-9. More specifically increasing thrust and range, But it says this will be done over software. How do you make an engine burn ...
- 93
1
vote
1
answer
3k
views
What is the fuel burn of a 787-9 on a ferry flight?
I can't find any literature on 787-9 fuel burn for ferry flights, meaning no cargo or passengers, just crew.
An 787-9 burns about 5400 litres when on normal commercial service.
How does it change when ...
- 29
1
vote
0
answers
365
views
Why did this flight, that usually flies around 40,000ft only fly at around 29,000ft for the route?
Looking at the flight BY6272 BRS-PMI, it was considerably delayed and flew (according to the flight radar app) at 29,000 feet rather than its usual 40,000 for this same route. It is a Boeing 787 ...
- 11
3
votes
0
answers
107
views
What is the aerodynamic impact of the curved/crescenteric wing of the Boeing 787? [duplicate]
From certain angles (see pictures below), the wing of the Boeing 787 seems almost curved/crescenteric in shape, particularly closer to the wing-tip. While the Boeing 787 makes use of "raked ...
- 974
4
votes
2
answers
891
views
What aerodynamic improvements were introduced on the Boeing 787?
When discussing the Boeing 787, three topics are brought up most often:
The new, extremely high-bypass GEnx engines
The shift to carbon composite construction and
The significant troubles Boeing ...
- 974
4
votes
1
answer
7k
views
Why do B787 Dreamliners more often fly at 42,975 ft rather than at 43,000, according to flightradar24?
The A350 and the B787 are the only passenger airliners that can be seen cruising as high as 43,000 ft on flightradar24 (with the exception of a B747 I once saw). However, the B787 is more often found ...
- 1,007
15
votes
1
answer
4k
views
What are these paint patches on this 787-8?
What are these paint patches on this British Airways 787-8 (G-ZBJB)?
- 6,615
12
votes
1
answer
5k
views
What is the purpose of the tiny doors used by the 787's laminar control?
The recent Oct 2021 YouTube video (The Insane Engineering of the 787 by Real Engineering) in the related question remarks:
[...] tiny doors whose purpose are a mystery to me with little to no ...
user14897
0
votes
2
answers
381
views
Is there any practical benefit of the Boeing-787 to perform near vertical takeoff?
In a promotional video for the Paris 2015 airshow, this video was released promoting the new Boeing 787's near vertical takeoff capability. Whilst highly impressive, I was wondering if there is any ...
- 101
13
votes
4
answers
5k
views
Could an airliner with only one functioning engine recover from a stall?
If a modern commercial airplane such as a Boeing 787 would stall with only one functioning engine, is it possible for the pilots to right it or would it require two functioning engines?
- 147
3
votes
1
answer
2k
views
What is the correct range of the 787-10?
There are two conflicting values for the 787-10's range; they are:
6,345 NM (11,750 km) -- boeing.com
7,000 NM (12,975 km) -- on the same website few years ago, as well as flightglobal.com
Note: In ...
- 31
3
votes
1
answer
3k
views
What protections and feedback does the fly-by-wire of the Boeing 777/787 provide?
I know the Boeing 777 and 787 run on Fly-By-Wire. I was wondering:
Do they have the Alpha Floor or Flight Envelope protections Airbus aircraft have?
Do they have force feedback/force feel? The 737, ...
- 669
0
votes
1
answer
1k
views
Why is there such a large price difference between the A350 and B787?
What are the reasons for quite significant difference in price between the Airbus A350 and Boeing 787? List prices for the A350-900 and 787-9 are around 317 million USD and 190 million USD ...
- 1,075
7
votes
4
answers
7k
views
Who is the owner of the world's only private Boeing 787 Dreamliner?
I have just stumbled across this video and I was wondering, if anyone knows who is the owner of this particular airplane (world's only private Boeing 787 Dreamliner)? I mean a man or a company -- an ...
- 4,160
1
vote
2
answers
264
views
Is the 777X actually the newest Boeing plane?
I don't think the 777X is actually the newest Boeing plane (in april 2020), since it's only a new variant of a previous Boeing plane. So the actual newest plane would belong to the 787, since it's the ...
- 732
2
votes
1
answer
974
views
Can the 787 mini navigation display be controlled independently from the ND?
Some aircraft, e.g., the Boeing 787 have the option to display a "Mini Navigation Display" on the left Outboard Display Unit, right under the Primary Flight Display:
(image source)
Is the ...
- 4,702
1
vote
1
answer
321
views
Are electromechanical actuators used in aircraft other than the Boeing 787?
Are there any large (non-experimental) civil or military aircraft that use electromechanical actuators (EMA), other than the Boeing 787?
- 11
20
votes
2
answers
12k
views
Why do flight attendants on the 787 lock the dimmable windows at different phases of the flight?
I’ve heard of many passengers complaining about the FAs locking the dim setting at different phases of the flight. Seems to be something the passengers definitely don’t like. And the passengers cannot ...
1
vote
0
answers
119
views
Is there any information about the Boeing 787 L/N 6 (ex-Mexican Air Force One)?
That Boeing 787 (L/N 6; N787ZA then XC-MEX) is (was) the Mexican Air Force One, and recently there has been some turmoil about if this is was acquired under lease or if it was a full purchase.
I was ...
- 341
14
votes
2
answers
3k
views
Why did the Boeing 787 switch back to separate IRS systems?
The Boeing 737 uses two independent IRS systems (see also Why are there two IRS switches on the 737NG?):
(source: 737 NG FCOMv2 (11.10.21 - Flight Management, Navigation - Controls and Indicators))
...
- 58.3k
4
votes
2
answers
3k
views
Which engines do airliners start first?
I noticed many planes, especially Boeings (correct me if I'm wrong anywhere), start engine "2" first and shut down engine "2" last.
However, I was watching an Airbus A350 cockpit video when I ...
- 43
5
votes
2
answers
500
views
How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350?
How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350? (according to wikipedia)
- 51
12
votes
2
answers
2k
views
What is the correct IATA airplane designator for the Boeing 787-10?
Wikipedia claims 781, most other sources say 78J. I can't find anything authoritative, and IATA has the gall to want US$578 for ...
- 344
4
votes
1
answer
1k
views
Why do Airbus and Boeing have different approaches to bleed air systems? [closed]
Reading Wikipedia and other questions like this, made me curious as to why Boeing uses bleedless architecture for its B787, while Airbus thinks differently for its A350 XWB (and Rolls-Royce thinks the ...
- 1,992
5
votes
1
answer
518
views
Are Dreamliner windscreens periodically replaced irrespective of damage?
Does Boeing have a statute that commands that the windscreens are changed for new irrespective of no signs of damage or fatigue, and if so, what are the intervals, for safety reasons?
- 51
12
votes
1
answer
3k
views
Would the wings of a Boeing 787 be snapped off in the same turbulence in which a DC-8 lost an engine and parts of a wing?
From forbes.com:
In 1992, a DC 8 cargo aircraft suffered turbulence so severe over the Front Range of Colorado’s Rocky Mountains that its left outboard engine was completely ripped off as well as ...
- 1
2
votes
0
answers
148
views
How does this very long tube deployed from the back of a 787 measure pressure? [duplicate]
Photos in the CNET's Up close with the first Boeing 787-9 include the one below with the caption
Boeing 787-9 at Farnborough The back of the first 787-9 has coiled tubing extended from the back of ...
- 6,311
1
vote
4
answers
1k
views
Who else is using electro-thermal wing anti-/de-icing apart from the 787?
I am researching into deicing technologies for the future, but apart from Boeing with Ultra/GKN, no one seems to be picking this technology up and being competitive. Any one know why this is? Is it an ...
- 11
0
votes
1
answer
2k
views
Wind correction on downwind during circling
A timing must be started when flying abeam the threshold on a circling approach. The FCTM of the B777/787 mentions 35 seconds and the SOPs of the Embraer 190 30 seconds. Do they need to be corrected ...
- 161
4
votes
3
answers
2k
views
Why does load shedding still occur in jetliners (e.g., 787) when there is so much power available?
I had a few questions about how electrical generator works on an aircraft, the 787 to be specific although I know it is similar for all aircraft.
So the 787 engines have 2 VFSG each which are rated ...
0
votes
1
answer
515
views
Is there a way to calculate the difference in pitch required to reach a certain vertical speed? [closed]
I am programming an autopilot for a 787 flight sim software and I've been having a problem.
I'm trying to simulate a PID that controls the pitch of the aircraft In relation to the vertical speed ...
9
votes
1
answer
3k
views
What does "share a type rating" mean?
The Boeing 787 shares its type rating with the 777, but what exactly does that imply?
Surely it cannot mean any 777 pilot can just jump into a 787 and fly it. While being similar, the 787 has some ...
- 58.3k
2
votes
1
answer
1k
views
How does a HUD track a runway?
I was looking at the FCOM of the 787, and I came across an interesting thing. There is an HUD takeoff selection on the SID selection page. It got me to wonder, how does the HUD track the runway from ...
1
vote
2
answers
769
views
Can the Mexican presidential aircraft be sold?
I have read that the next Mexican president is trying to sell the B787 that serves as presidential transport, and that it was already made an offering to Boeing for it.
As far as I know, the VIP/...
- 341
16
votes
1
answer
2k
views
What is an "all-electric APU"?
Understand that the APS5000 used in the B787 is the first all-electric APU for large commercial aircraft.
Source: http://www.pwc.ca/en/engines/auxiliary-power-units
Sorry if this sounds too ...
- 173
0
votes
0
answers
301
views
Will the new Boeing NMA be 'more electric' than the current B787?
I understand that the B787 is the 'most electric' aircraft to date, however there have been many issues with the plane, and I'm interested in knowing if the latest Boeing New Midsize Aircraft (NMA) - ...
- 173
-6
votes
1
answer
175
views
What is the flight time from Beirut to Paris using different aircraft?
If the distance between Beirut and Paris is 1985 miles / 3194.55 km / 1724.92 nautical miles, and a flight using Airbus 320-200 take 4 hours and 40 minutes, how much would it take using the following ...
- 295
2
votes
0
answers
786
views
How does the Boeing 787's Cabin Air Compressor work？ [closed]
How does it work in normal, overheat and over-pressure conditions? What is the function of the variable diffuser actuator?
- 153
62
votes
4
answers
12k
views
How can a two-engine B787 create three contrails?
Today I noticed overflying aircraft (over Sydney at FL400) which appeared to have three contrails. When I checked Flightradar24 app, I saw that this overflying aircraft is B787.
What would be the ...
- 863
7
votes
3
answers
2k
views
Why would a stretch variant need a larger horizontal stabilizer?
With the 787-10 stretch, Vedad Mahmulyin (a Boeing engineer) saved the company millions by implementing a software solution that negated the need to enlarge the horizontal stabilizer.
Software again ...
user14897
0
votes
2
answers
304
views
Delta fleet plans - all Airbus? (and Bombardier) [closed]
With Delta ordering A321neos and C-Series not 737 Max 10s, A339s, A359s instead of 789's, might Delta be on their way to an all-Airbus fleet? Or going away from Boeing?
Was the 737 Max vs A321neo ...
user26259
6
votes
2
answers
3k
views
What is the purpose of the 787 engines extending on landing? [duplicate]
As seen about 53 seconds into this video of the Qantas Dreamliner landing, the engine housings seem to extend upon landing. What specifically is the purpose of this? To balance? To help with air flow?
- 358