Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [boeing-787]

Twin-engine wide-body passenger jet produced from 2009-Present. Versions typically carry between 242 and 420 passengers. Notable for being the first passenger jet to utilize composites for a large portion of the aircraft's structure.

12
votes
1answer
2k 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
118 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 ...
1
vote
4answers
188 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 ...
0
votes
1answer
123 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 ...
3
votes
3answers
291 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
69 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 ...
7
votes
1answer
352 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 ...
1
vote
1answer
206 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 ...
0
votes
2answers
469 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/...
14
votes
1answer
1k 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
179 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
113 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 ...
2
votes
0answers
264 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?
58
votes
4answers
11k 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 ...
5
votes
3answers
564 views

Why would a stretch variant need a larger horizontal stabilizer?

Update and accept reason The reason for asking why would as opposed to why does is I was not aware of any previous [jetliner] stretch requiring a larger horizontal stabilizer. For example, all the DC-...
0
votes
0answers
62 views

Boeing 787-10 and 787-dreamliner [duplicate]

Why does the new 787-10 dreamliner have a lower range than that of 787-9 and 787-9 dreamliner?
0
votes
2answers
194 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 ...
6
votes
2answers
2k 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?
2
votes
1answer
186 views

What is the purpose of long endurance test flights?

Well known is the last long endurance test flight by a Boeing B787-8, which drew its shape in the air for 18 hours while on a long endurance test flight: https://www.wired.com/story/boeing-787-8-...
5
votes
1answer
625 views

What happens if full thrust is applied at cruise altitude for 5-10 minutes on a 787?

What happens when you apply full throttle to the engines of a Boeing 787 at cruise altitude for 5-10 minutes? Other than wasting fuel, what maximum speeds are reached? Does that pose any danger or ...
9
votes
2answers
2k 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?
2
votes
1answer
393 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 (headwind) and SFO-SIN 17 hours (tail wind), flying United. According to the Dreamliner Wikipedia page, the 787 range is 7,635 nmi (14,140 km)...
0
votes
0answers
53 views

Is the same material used for the entire length of the wing from root to tip? [duplicate]

Considering the flexibility of the wings of a Boeing 787 Dreamliner, is the material used for the entire length of the wing the same from root to tip? What material was used to achieve the ...
1
vote
1answer
658 views

What is the sweep angle of the Boeing 787's horizontal stabilizers?

What is the sweep angle of the horizontal stabilizers on a Boeing 787 Dreamliner? Does it have to be equal to that of the wings, and how is it determined?
3
votes
3answers
565 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 ...
8
votes
1answer
619 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 ...
10
votes
1answer
1k views

What components of the Boeing 787 are made out of titanium?

Inspired by the question, Why is the 787 tail cone made out of titanium?, I want to know what other parts of a Boeing 787 are made out of titanium. We now know, the APU exhaust cone is made out of ...
38
votes
1answer
6k views

Why is the 787 tail cone made out of titanium?

In this question there is a drawing of a 787 that shows that the tail cone is made of titanium. Why is such a heavy-duty material like titanium required for the tail cone? I do not see how there ...
14
votes
1answer
751 views

What is the purpose of the fin at the Boeing 787 APU exhaust?

The fin is located under the Boeing 787 APU exhaust as shown in the picture below. Does anybody know the application of this thing or it is used for 'guiding' the APU exhaust? Thanks.
7
votes
1answer
480 views

Why do the emergency oxygen masks for some 787 premium class seats have an extra 'streamer' to pull them down?

Specifically, on Norwegian 787s, you are briefed: "In economy seats, reach for your mask. In premium seats, pull the streamer for the mask to drop the full distance." (source) Now the ...
22
votes
3answers
5k views

Why does the Boeing 787 have fewer cockpit windows?

Why does the Boeing 787 have fewer cockpit windows? The 787 has only 4 cockpit windows, whereas other airplanes have 6. Here is a comparison between the 787 and 777: ^ 787 V.S. 777 v
3
votes
1answer
2k views

Does the Boeing B787 have safety issues with its battery and windshield?

AVHerald has reported An incident of battery overheating. That is after the aircraft has been grounded and parts of the battery system redesigned. AVHerald provides a detailed report on the battery ...
5
votes
1answer
769 views

How do tyre pressure sensors in aircraft work?

I am specifically interested in the sensors used on B777 and B787.
6
votes
3answers
4k 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.
3
votes
1answer
645 views

How many layers do the Boeing 787 cabin windows have and what might make them fail? [duplicate]

I am interested to know how the Boeing 787 cabin windows are made. Specifically, how many layers do they have and what can make them crack in-flight?
0
votes
1answer
2k views

Boeing 787 type rating [closed]

How tough/easy is to crack a 787 type rating course? Is a wide body aircraft difficult to fly especially when you are transitioning from 737? Any tips/suggestions would be much appreciated.
2
votes
1answer
326 views

What's the benefit of this long flight (apart from marketing)?

The post Do promotional flight routes have a historical precedent? asks about previous occurrences. I'm guessing this flight (shown below) was a test flight, as well as being a marketing attempt. ...
10
votes
4answers
341 views

Do promotional flight routes have a historical precedent?

Right now, a Dreamliner is flying a rather strange path over the USA (see below). The plane took off from Boeing Field airport near Seattle, and is 'drawing' a virtual copy of itself on the map of the ...
5
votes
2answers
398 views

How are special flight paths coordinated with ATC?

I assume they have to enter a flightplan for this or do say just say "it's a test, please clear airspace for us around the complete US"? Still flying and completing the right wing. I would ...
2
votes
2answers
486 views

What is the technical name of the electric window dimming system?

I have recently flown from Mexico City (MMMX) to Tokyo, Japan (RJAA) in a Boeing 787 of All Nipon Airways (ANA). The plane had an electric system for dimming the windows. Does the window-dimming ...
8
votes
1answer
282 views

How is structural damage to a composite fuselage detected?

When a service vehicle collides with the aircraft, the plastic nature could hide any subsurface fractures which could propagate as the aircraft goes through cycles. How is potential damage diagnosed ...
19
votes
1answer
2k 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 ...
1
vote
1answer
496 views

Why hasn't Boeing updated the 747 with technology from the 787?

Why hasn't Boeing updated the 747 with technology/designs from the 787 Dreamliner? Surely this would be a very successful aircraft as it could have the best of both designs. Has Boeing explained why? ...
-1
votes
1answer
1k views

For a B787 in cruise, what is the altitude, speed, and angle of attack?

For a Boeing 787 in cruise, what's the altitude, speed, and angle of attack? I need the reference as well (normal flight cruise)
9
votes
2answers
2k views

How do virtual circuit breakers work?

In AW189, B787 and few other aircraft/helicopter, the physical breaker has been replaced by virtual breaker, which can be controlled by the MFD (Multi-Function Display). I tried to google the answer, ...
2
votes
1answer
372 views

Which type of chevrons is applied on the B787?

Which type of chevron nozzle was applied on the B787? I'm really confused about whether if it's sawtooth or sine wave.
4
votes
1answer
891 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 ...
14
votes
1answer
2k views

Where are the circuit breakers on the 787?

(787 left, 777 right) Normally found aft of the overhead panel, where are they on the Boeing 787?
14
votes
1answer
2k 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. ...
-5
votes
1answer
5k views

How long would it take the Boeing 787 to go around the world? [closed]

How long would it take the B787 to complete a full trip around the world and how many times would they have to refuel in that trip?