Questions tagged [boeing]
A United States-based multinational corporation that designs, manufactures and sells fixed-wing aircraft, rotorcraft, rockets and satellites.
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Why are only flaps 5,10,15 recommended in windshear operations during B737-800 takeoff?
During takeoff in a B737-800 when there is predicted wind shear you can only use flaps 5,10 and 15.
Why is this? If possible to provide a reference for it.
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P-8A Poseidon Airfoil type
Could someone help me find out what airfoil type is used on the P-8A Poseidon symmetrical, conventional, thin or supercritical airfoil?
It seems to be, that the Boeing 737-800, like many commercial ...
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Where to find the official specification of Boeing 737-300 fuel consumption rate and such?
I've been doing some work regarding the analysis of boeing 737-300 fuel consumption in commercial flights, and how all of them fare with the fuel consumption standards, like fuel consumption rate at ...
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On the B737 When A and B systems are pretty much each other's back up for most things Why not for flaps? [closed]
Why have a seperate system for flaps? Which is alternate flaps
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What is the aircraft type in the movie 'Once Upon a Time in Hollywood'?
Once Upon a Time... in Hollywood, a recent movie set in the late 1960s, has a few scenes in a Pan American Airways (Pan Am) aircraft. Looking at Pan Am's fleet at that time, it looks like it was ...
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Has Boeing ever tried to compete with the A380, especially now that the B747 is retired in many companies, such as Qantas?
Has there ever been a competitor that is a four-engine plane from Boeing that rivals the A380?
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What was Boeing's competitor to the C-5?
Doing some of my airplane learning, I have come across a point many times that the engines for the Boeing 747 (at least partially) came from Boeing's competitor to the C-5 Galaxy. What was this plane ...
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Boeing 737 takeoff config question
On the Boeing 737, what's the difference between taking off in LEVEL CHANGE or no vertical mode selected (i.e. both LEVEL CHANGE and VNAV button blank on MCP).
I realize in both the MCP speed window ...
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What does this switch on Boeing Sky overhead bins do? Why is it always set before taxi?
The pivoting overhead luggage bins in the Boeing Sky interior have a tiny switch/lever on one side. In my experience, cabin crew always flips this switch on every single bin (as indicated by the arrow ...
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Why did only Boeing choose to use 4-engines on the B-17?
The USAAC announced a competition in 1934 for a new multi-engined bomber with the requirement that it carry ~2000 lbs of bombs 2000+ miles at 200+ mph (with 250 mph preferred). The three entrants to ...
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What is this open panel at the rear of this airplane?
I saw this photo at another interesting question:
There's an open square panel. What is it?
P.S. Any tag suggestions are welcome. All I could think of was "tail".
EDIT: are there any other tags for ...
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Why aren't 757 scimitar winglets flush with the ailerons?
Over my many past flights aboard 757s, I have seen changes being implemented with their design. One of which was notably their refit of scimitar winglets. Although one of their most notable ...
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Why are there two different throttle designs for the 757 and 767?
There is this one, which seems to be the older version. Notice there is a big gap between each lever, except at the top.
And this one. Notice there is almost no gap between each lever, making it ...
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Comparisons between the A340 and 747-200 wing: sweep angle and span
Here is a picture of the wings of the A340 (launched in the late 1980s) and the Boeing 747-200/400 (launched in the early 1970s / 80s) superimposed upon each other (source: https://www.amazon.com/...
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Why are aircraft parts built in different places and assembled in one?
Airbus has its manufacturing facilities in Spain, France, Great Britain and Germany. Each country produces different parts of the aircraft and is finally assembled in one place.
Why is this? Wouldn't ...
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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 ...
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Where can Boeing wind data be found?
There are various services that use world-wide Boeing Winds for forecast wind data which can be used to calculate an approximate flight time between two locations. They usually have best case, worst ...
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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 ...
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What is the difference between Boeing 73G, 73H and 737?
I found a data source, where Boeing 737 could be encoded with the following values - 733, 734, ...
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How have aerodynamicists improved transonic wing performance over time?
The following two graphs depict improvements in transonic wing technology that have occurred over the past 20-25 years. Both are sourced from Boeing Commercial Aircraft.
In essence, both note that ...
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Why do the ailerons on an A320 droop when the engines are shut off and the 787 ailerons dont droop when the engines are shut off?
I have been wondering why the ailerons on the A320 (and other Airbus aircraft) droop when there is no power from the hydraulic pump. From my understanding of hydraulic actuators, the position where it ...
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Why did Boeing never replace the 757?
https://boeing.mediaroom.com/2005-04-28-Boeing-Closes-Chapter-in-Aviation-History-with-Final-757-Delivery
Boeing in late 2003 decided to end 757 production because the increased capabilities of the ...
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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 ...
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Interpreting a graph depicting airfoil technology improvement
I found this image in a paper titled, "Design and validation of advanced transonic wings using CFD and very high Reynolds number wind tunnel testing" that was published in part by Mark I. ...
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What is the purpose of an inboard aileron? [duplicate]
I've noticed that larger Boeing aircrafts (such as the 777, 767, 747, etc) are equipped with inboard ailerons. What is their purpose and why hasn't Airbus incorporated them on the A330 or the A340?
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Can air traffic control see control panel selections (I.e. FCU on A320 or MCP on B737)?
I have flown with a few captains that have told me that air traffic control can see the settings we set on the FCU (or MCP on B737):
Is this actually correct? I'm aware that ATC can see what speed, ...
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What’s the horizontal and vertical tail airfoil and volume of 747-400? [closed]
What’s the horizontal tail volume coefficient of 747-400? What’s the vertical tail volume coefficient of 747-400? What’s the horizontal tail airfoil of 747-400? What’s the vertical tail airfoil of 747-...
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Why didn’t Boeing ramp 737NG production back up in response to the 737 MAX groundings?
The predecessor of the currently-grounded 737 MAX is the 737 Next Generation (737NG), produced from 1997 through 2019. The NG family (comprising the 737-600, -700, -800, and -900) is extremely ...
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How has Computational Fluid Dynamics improved commercial airliner wing design?
Starting the 1980s, extremely powerful computational fluid dynamics software has been used to design wing sections and whole wings. I am going to focus on the Boeing 777 as an example of CFD applied ...
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How have engineers managed to increase commercial airliner wing aspect ratios over time?
Over time, the wing aspect ratios of commercial airliners have increased.
For evidence ,see the following data:
1980s:
Boeing 747-400: 7.91,
Boeing 757-200: 8.0
Boeing 767-300: 8.0
Airbus A310: 8.8
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How did the 767/757 reduce fuel burn relative to older aircraft (like the 727)?
When Boeing launched the 757 and 767 aircraft, they widely touted it's improved fuel efficiency relative to previous airliners. Notably:
Delta stated that the 767 was "quieter and 30 percent ...
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Do the B777x and similar aircraft use ring laser gyros or solid state MEMS gyros?
In new generation aircraft like B777x , B787 or A350 use the IRS system which is present is it based on (Ring Laser or Fibre Optics) gyros or they used Solid state MEMS like which our present in our ...
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Could anyone provide me with the performance charts for Boeing KC-135R Stratotanker?
I am looking for the Long Range Cruise Maximum Operating Altitude performance against the weight of the plane, all engines operating. Would be grateful if someone could point me the way.
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Why didn't ejection seats become a thing in civil avation and only limited to military? [duplicate]
Recently, an Indian CDS Bipin Rawat and his family as well as eleven members of the Indian Army died in an helicopter crash. You can find the story here. I did look at any questions asked on the topic ...
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Does aircraft manufacturers provide option to exchange older models?
Most of the vehicle manufacturers provide exchange value for older models when buying a newer one. Like you can exchange your old BMW 3 Series for new 3 Series or upgrade to 5 Series and so on.
Is ...
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What is the difference between a Boeing Line number and a Block number?
We know that every Boeing aircraft has a Line number, Block number, and MSN number. I want to know what what does it mean by this Line Number or Block number. and what are the difference among these ...
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Did Boeing or Lockheed ever seriously consider releasing a widebody airliner powered by low-bypass engines?
During the 1960s race to build the first widebody jetliner, each of the three major engine manufacturers was racing to put out a high-bypass engine for one of those jumbo jets:
Boeing went with Pratt ...
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What is that little black thing tied to the vertical stabilizer? [duplicate]
I have seen this on all Boeing test planes, does this provide information on the planes performance?
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What are these five indicators at the front of the 737 passenger cabin?
As a passenger I noticed a set of five indicators on the ceiling at the front of the 737 passenger cabin. They are red, yellow (or white), blue, white, red.
The red ones seem to be coupled together (...
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Why doesn't Boeing use supercritical airfoils?
It's my first question & I really want to know the answer from professionals to decide if my new design of airfoil is worth it because the initial test by CFD software (Fluent-ANSYS) indicate that ...
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Does Boeing use a similar display to Airbus ECAM to view a particular system?
Airbus has a dedicated ECAM panel forward of the throttles which is used to select a system for display on the LCD. Is there a similar panel used to select a particular system for display on Boeing's ...
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Is it possible to continue flying without electric power? [duplicate]
To be specific with the question, I would like to know if if it is possible to continue flying in the event of total loss of electrical power. Obviously, I know this entails the shutting down of ...
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Why do certain aircraft's landing gear tilt up?
Why do the main landing gears of aircraft like the A330, 777, 787, etc tilt up? This does not happen with the 767. Interestingly, for the 747, the inner landing gear does not tilt up while the outer ...
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Why did Boeing keep using yokes while Airbus moved on to sidestick?
The first Airbus had yokes but they changed to the sidesticks after a while But Boeing is still stuck with yokes even with 777-300ER decades later.
The sole purpose of the yokes are seemingly for the ...
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Why was this commercial jet accompanied by small plane near Seattle?
From the South Beach Campground on the western shore of the Olympic Peninsula in Washington State we observed this unusual formation:
I only had a Sony RX100 at hand but perhaps the image quality is ...
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How heavy are the folding wingtips of 777x?
To understand the mass penalty that is induced by a folding wingtips, as a first order approximation we can start with just the wingtip's mass without the actuating mechanism.
I could not find the ...
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How can I tell apart an Airbus from a Boeing?
When looking at an airplane, what are the main external features I should look at if I want to determine if it is an Airbus or a Boeing (shape of the tail, fuselage, winglets, wings, etc.)? Same ...
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Why does Boeing 247D have reverse slope windows when they were removed from the D models?
Have a look at this article on a famed example of the 247D, DZ203, the first aircraft to make a completely blind landing. The first image is the aircraft during its flights with the RAF, which places ...
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Why do Boeing aircraft have serrated engine nacelles, but Airbus does not?
Why do Boeing's new generation of jets (787, 747-8, 777X, 737MAX) have serrated engine nacelles whilst Airbus' latest (A350, A320neo etc) do not? I understand that Boeing's nacelles reduce turbulence ...
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How does the B777 Side brace locking mechanism work?
The B767 has jury strut actuators and their working is pretty straight forward. They oppose the collapsible geometry of jury strut and lock them in the over centre locking position.
But for B777 this ...
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