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.

Filter by
Sorted by
Tagged with
3
votes
1answer
252 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, ...
0
votes
2answers
131 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 ...
13
votes
4answers
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?
3
votes
1answer
251 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 ...
7
votes
3answers
1k 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 ...
0
votes
1answer
208 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 ...
11
votes
2answers
1k 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)) ...
3
votes
3answers
810 views

How much fuel did this Boeing 787-9 have on board for this flying display?

Once I saw how an Airbus A350 did a validation flight prior to an airshow and flew back to Toulouse from London Farnborough without landing/refuelling (distance: 550.57 mi (886.06 km)). I thought that ...
6
votes
3answers
2k 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 ...
23
votes
2answers
11k views

What is a gust alleviation system?

Reading about the 787 it says it has an active gust alleviation system similar to the system used on the B-2 bomber. [1] The gust alleviation patent says: The gust alleviation system picks ...
5
votes
1answer
7k views

What is the maximum pitch for the Boeing 787 Dreamliner?

I recently watched a video of the Boeing 787 training before Farnborough. This aircraft climbed very fast; does someone know the maximum pitch of this aircraft?
4
votes
1answer
3k views

Does the yaw damper require manual activation on modern airliners?

Modern commercial aircraft are equipped with yaw dampers. This post explains the feature. Now I was wondering if there is a button to manually activate and deactivate it (e.g., on a Boeing 787) or if ...
4
votes
2answers
1k 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 ...
1
vote
2answers
198 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 ...
2
votes
2answers
645 views

How is the range/fuel computed when there is a 3-hour difference for the same route?

I am not a pilot. I recently took a trip SIN-SFO 14 hours (tailwind) and SFO-SIN 17 hours (headwind), flying United. According to the Dreamliner Wikipedia page, the 787 range is 7,635 nmi (14,140 km),...
1
vote
1answer
247 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 ...
35
votes
3answers
48k views

What are the effects of the Boeing 787's very flexible wings?

I recently came across this picture of the Boeing 787 series aircraft's incredible wingflex: I suppose this is a consequence of using very light CFRP wings, but how does the wingflex itself improve ...
1
vote
1answer
174 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?
20
votes
2answers
9k 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
0answers
99 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 ...
8
votes
3answers
9k views

How does the nitrogen generation system in a Boeing 777 work?

How does the nitrogen generation system in a B777 work and how does it differ from that used in a B787? Any diagrams will be appreciated.
12
votes
2answers
973 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 ...
8
votes
2answers
2k views

How do tyre pressure sensors in aircraft work?

I am specifically interested in the sensors used on the B777 and B787.
21
votes
2answers
13k views

Could the Boeing 787-9 near vertical takeoff demonstration be performed by Airbus A350 aircraft?

I am an aviation enthusiast. A couple of months back I came to know about the difference between piloting Boeing and Airbus planes here. What are the main differences piloting Boeing vs. Airbus ...
5
votes
2answers
390 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)
20
votes
4answers
8k views

Did any Boeing 787 operator achieve the 20% fuel efficiency improvement over the 767?

Is there any airline which are able to get the complete 20% fuel efficiency on their 787 with respect to 767 it is going to replace, as told by Boeing. I have read that one of the early customer like ...
11
votes
1answer
4k views

How much time it will take a B787 to fuel completely when empty?

When a big jet like B787 needs to be fueled with empty tanks, ideally how much time it will take to go full?
4
votes
1answer
853 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 ...
20
votes
3answers
32k views

Does the B787 (Dreamliner) operate with higher cabin pressure?

The Boeing 787 Dreamliner's fuselage is almost completely made of composite carbon fibre material, which is not susceptible to metal fatigue. The main reason why the cabin pressure in a pressurized ...
14
votes
3answers
20k views

How does the Boeing 787 Dreamliner's glide ratio compare to other airliners?

I just saw a documentary on the design of the Boeing 787 "Dreamliner" and one of the designers said that the wings were inspired by gliders. Looking at the production version of the plane, it is ...
5
votes
1answer
431 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?
6
votes
1answer
1k views

Does the 787 gust alleviation system make a more comfortable ride or for a more stable aircraft?

The 787 active gust alleviation system, similar to the system used on the B-2 bomber, improves ride quality during turbulence. Ride quality in a B2 bomber means a more stable weapons platform. Ride ...
31
votes
3answers
4k views

In what circumstances could a 787 stay powered on continuously for 248 days?

The FAA has issued an airworthiness directive for the 787: SUMMARY: We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787 airplanes. This AD requires a ...
9
votes
1answer
2k 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 ...
2
votes
0answers
477 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?
8
votes
1answer
2k views

Which commercial aircraft can perform a parallel engine start?

In various Youtube videos, e.g. this one, one can see that the Boeing 787 is capable of a parallel engine start (both engines are started at the same time). Are there any other commercial aircraft ...
12
votes
1answer
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 ...
2
votes
0answers
139 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 ...
0
votes
1answer
942 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 ...
15
votes
1answer
3k views

Why can't Norwegian's Boeing 787 operate from Vegas during hot weather?

In a German news article it was stated that the additional weight (Norwegian puts 291 passengers on their 787-8) leads to operations restrictions in Las Vegas when temperature conditions exceed 40°C. ...
1
vote
4answers
715 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 ...
4
votes
3answers
989 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
1answer
298 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 ...
2
votes
1answer
762 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
2answers
730 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/...
20
votes
1answer
5k views

Why do flaperons 'move down then up' on takeoff roll on a 787?

The flaperons on the 787 go through certain motions once the TO/GA is pressed. I've always seen it when the 787 is viewed from behind on takeoff. The motions are completely symmetrical, i.e., not ...
16
votes
1answer
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 ...
0
votes
0answers
278 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) - ...
-6
votes
1answer
154 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 ...
12
votes
2answers
8k views

Why does the Boeing 787 use Cabin Air Compressors (CACs)?

What are the advantages of this new air conditioning system compared with the traditional engine bleed systems? More engine output power, or easier adaption to future aircraft design?