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.
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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?
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 ...
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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/...
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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 ...
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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 ...
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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) - ...
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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 ...
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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?
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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 ...
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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 ...
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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?
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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-...
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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 ...
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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?
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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?
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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, ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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?
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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.
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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)
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Why does the boeing 747-8 have less wing flex than the 787?
If you know the 787 wing flex is much greater than the 747-8's wing why can't the 747-8 have a greater wing flex
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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? ...
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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.
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What is the cause of the whiny noises in cabin of the Boeing 787?
What are the various whine noises coming from the Boeing 787 cabin? Especially near the wing. I have seen tons of YouTube videos in which it has a noise during takeoff, or when flaps are being lowered ...
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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?
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Why does the Boeing 787 engine nacelle exhaust have such an unusual shape?
Why does the Boeing 787 nacelle have this unique shape at the exhaust:
I haven't seen it on any other airplanes, does it serve an aerodynamic purpose or help engine efficiency or is it just to look ...
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Can the need for an engine overhaul affect the ETOPS rating?
I read this news:
http://edition.cnn.com/2016/04/23/us/boeing-dreamliner-engine-fix/index.html
So seemingly the reliability of the 787 engines made by General Electric is not as high as expected and ...
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Is there any difference between the Boeing 787 and the 737 MAX? [closed]
I've just done some research on the Boeing 787 and the 737. But the 787 and 737 MAX seem almost completely alike. Are there any differences between the 787 and the 737 MAX?
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What parts of the 787 are produced with 3-D printing (besides air ducts and hinges)?
This article from 2013 states that about 30 parts of the Dreamliner are 3-D printed, mostly air ducts and hinges.
I wonder
what other parts are produced by direct manufacturing?
why it was deemed ...
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How much thrust do you lose by putting chevrons on a engine?
The chevrons on a 787 are there exactly to decrease a type of drag that makes the engine louder, but the chevrons form vortices causing more drag. How much thrust is lost from the vortices on the ...
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Is the A350 more efficent than the B787?
I have wondered this because the Trent 1000 engines are very similar to the Trent XWB engines on the 787. And if the A350 has better efficiency then why do so many airlines purchase the 787?
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Why does the chevron-shaped engine suffer losses in thrust performance?
From here I found out a lot about chevrons on the Boeing 787, but not enough to satisfy why it results in performance loss.
My thinking was originally, if they are "cutting triangular holes" in the "...
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The root cause for Boeing 787 Dreamliner battery problems [closed]
Wikipedia's B787 article states that:
The causes of the battery failures are still unknown. There is still concern that because the root cause of the fires were not identified, the solutions put in ...
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How much humidity is being maintained in cabin and cockpit of B787?
I think in general there is less than 10% humidity is being maintained in most of the commercial aircraft but I think they have improved that in the 787. I am not sure how much that is and if the ...
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