Search found 21500 matches

by DocLightning
Thu Sep 19, 2019 2:41 pm
Forum: Technical/Operations
Topic: Winglets and Raked Wingtips — A Couple of Questions
Replies: 17
Views: 2531

Re: Winglets and Raked Wingtips — A Couple of Questions

Thank you very much Doc Lightning, that's an awesome explanation, but did you mean non-planar here? ...A planar wingtip device does not increase the bending moment as much (but it still does) and does not increase the span as much (but it still does) but it needs to be about 50% bigger to achieve t...

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by DocLightning
Thu Sep 19, 2019 2:41 pm
Forum: Civil Aviation
Topic: DL2353 diverts to TPA after rapidly descending from FL 390
Replies: 48
Views: 10029

Re: DL2353 diverts to TPA after rapidly descending from FL 390

KFTG wrote:
How is the year the airplane was built relevant to the discussion?


The same reason the reg is relevant.

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by DocLightning
Thu Sep 19, 2019 5:30 am
Forum: Civil Aviation
Topic: DL2353 diverts to TPA after rapidly descending from FL 390
Replies: 48
Views: 10029

DL2353 diverts to TPA after rapidly descending from FL 390

https://www.flightradar24.com/data/flights/dl2353

Has anyone heard about this? Looks like a depressurization event.
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Looks like DL 2353, a 767-300ER (N1608, delivered in 2000) rapidly descended from FL390 to FL100 over a course of about five minutes and diverted to TPA from a planned ATL-FLL. https://www.flightradar24.com/data/flights/dl2353

Has anyone heard about this? Looks like a depressurization event.

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by DocLightning
Tue Sep 17, 2019 7:16 pm
Forum: Technical/Operations
Topic: Winglets and Raked Wingtips — A Couple of Questions
Replies: 17
Views: 2531

Re: Winglets and Raked Wingtips — A Couple of Questions

What is the difference bewteen a planar wingtip and simply increasing the span? The rake affects the wingtip vortex differently. So here's the deal with raked tips: A simple span extension becomes an unacceptable design because the leading edge needs leading edge devices. That far out, the wing bec...

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by DocLightning
Tue Sep 17, 2019 4:07 am
Forum: Travel, Polls & Preferences
Topic: BA New Livery?
Replies: 15
Views: 3062

Re: BA New Livery?

Hopefully not, that livery is timeless it feels like. So was Landor. BA has always done a great job with liveries for its time. But their visual brand is very distinct. The last change in corporate visual brand went well (once they dropped the "World Tails" nonsense). It will eventually b...

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by DocLightning
Tue Sep 17, 2019 3:54 am
Forum: Non-Aviation
Topic: SJWs on the use of "Latinx"
Replies: 47
Views: 1520

Re: SJWs on the use of "Latinx"

In Spain, their solution to a gender-neutral suffix is o use the @ when written. "¡Buenas tardes, [email protected]!" But pronounced it would be "chicos y chicas" I used to do that too (in chat, because formal writing frowns upon it), but in formal settings I've learned to use 3rd person p...

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by DocLightning
Tue Sep 17, 2019 2:38 am
Forum: Non-Aviation
Topic: SJWs on the use of "Latinx"
Replies: 47
Views: 1520

Re: SJWs on the use of "Latinx"

2. It did not use Latinx, so the gender-neutral folks will not feel included (this is in an LGBT group). I personally HATE this term and refuse to reference anyone as Latinx; how come Latino wasn't an issue years ago? And why is it that actual Hispanic countries don't have a need to use it? It's li...

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by DocLightning
Tue Sep 17, 2019 2:25 am
Forum: Technical/Operations
Topic: Winglets and Raked Wingtips — A Couple of Questions
Replies: 17
Views: 2531

Re: Winglets and Raked Wingtips — A Couple of Questions

Actually, it's not so much maximizing additional lift but reducing induced drag (a function of lift). Induced drag is reduced by artificially increasing aspect ratio. Both planar and nonplanar wingtip devices increase lift on the outboard span. A planar wingtip device, like the Boeing raked wingtip...

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by DocLightning
Sun Sep 15, 2019 4:57 am
Forum: Civil Aviation
Topic: Kenyan lawmaker wants to ban flatulence on airplanes
Replies: 51
Views: 7356

Re: Kenyan lawmaker wants to ban flatulence on airplanes

This article talks about giving pax drugs...is that even healthy? The most common anti-flatulence drug is simethicone, marketed in the USA as "GAS-X" and "MYLICON." *80% of bowel gas in a typical adult is swallowed air. *In the bowel, gas usually exists as a series of small bubb...

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by DocLightning
Sun Sep 15, 2019 4:53 am
Forum: Civil Aviation
Topic: Kenyan lawmaker wants to ban flatulence on airplanes
Replies: 51
Views: 7356

Re: Kenyan lawmaker wants to ban flatulence on airplanes

This guy sounds like he's full of hot air.
Why is he farting around with stuff like this?

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by DocLightning
Sat Sep 14, 2019 6:36 am
Forum: Civil Aviation
Topic: Can existing 737MAX airframes be deMAXed?
Replies: 13
Views: 2242

Re: Can existing 737MAX airframes be deMAXed?

I suppose you could remove the wings, fit 737NG wings instead with 737NG engine mountings and engines CFM is not planning on producing the CFM56-7b much longer because it will be replaced by the LEAP-1B. Also, this aircraft would be utterly uncompetitive against the A320NEO and no amount of financi...

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by DocLightning
Fri Sep 13, 2019 2:31 am
Forum: Civil Aviation
Topic: MD90 vs B737 Max
Replies: 49
Views: 7255

Re: MD90 vs B737 Max

1) The airplane is longer for the same number of passengers because of the 2+3 seating arrangement. 2) It is both structurally and aerodynamically more favorable to have the engines mounted on the wings. This both softens the sudden increase in overall cross-section at the wing root by starting it w...

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by DocLightning
Thu Sep 12, 2019 11:27 pm
Forum: Civil Aviation
Topic: Coffee Spill Forced A330 Diversion
Replies: 67
Views: 11689

Re: Coffee Spill Forced A330 Diversion

https://youtu.be/0oyWZjdXxlw?t=2650

They do.
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Amiga500 wrote:

Dunno if Boeing have a good cupholder or not either - if so they probably have a buzzword acronym for it


https://youtu.be/0oyWZjdXxlw?t=2650

They do.

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by DocLightning
Thu Sep 12, 2019 10:19 pm
Forum: Civil Aviation
Topic: Coffee Spill Forced A330 Diversion
Replies: 67
Views: 11689

Re: Coffee Spill Forced A330 Diversion

From what I can see, the A330 cup holder is a slightly tapered tube sticking out of a vertical surface and it seems to be placed in an unergonomic place. By contrast, the 777 cup holder is a sophisticated design that can hold a regular paper coffee cup, a coffee cup with a handle, or a soda can all ...

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by DocLightning
Mon Sep 09, 2019 3:08 pm
Forum: Travel, Polls & Preferences
Topic: Why didn't Cathay Pacific order A380?
Replies: 12
Views: 1749

Re: Why didn't Cathay Pacific order A380?

They answer that questions themselves here: http://youtu.be/4qtDgCjdYGU He says things that he heard somewhere but that doesn't apply or that applies in the opposite. What he is saying is CX policy. Obviously, given that it is released by CX's PR department, his statements have been reviewed by his...

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by DocLightning
Mon Sep 09, 2019 5:29 am
Forum: Civil Aviation
Topic: BA9154 diversion into OAK (Sept 8)
Replies: 20
Views: 4661

Re: BA9154 diversion into OAK just now

Scarebus34 wrote:
[twoid][/twoid]
pdp wrote:
Scarebus34 wrote:
This was not a diversion. The aircraft was positioned from SFO to OAK.


I'm guessing it'll be sat there until Wednesday now?

Was likely positioned due to the cancellations caused by BA pilot industrial action. Not enough room to leave it parked at SFO.


Who flies it if the pilots are on strike?

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by DocLightning
Mon Sep 09, 2019 5:09 am
Forum: Civil Aviation
Topic: BA9154 diversion into OAK (Sept 8)
Replies: 20
Views: 4661

Re: BA9154 diversion into OAK just now

Was just coming across the San Mateo bridge 20min ago when from a distance I see a irregular heavy on OAK approach. I was still at a distance at dusk but I made out the tail and quickly looked at Flightradar. Looks like it flew around the bay for a bit outta SFO. Anyone got any info on the reasonin...

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by DocLightning
Mon Sep 09, 2019 5:05 am
Forum: Civil Aviation
Topic: Pan Am and the 747-400
Replies: 105
Views: 14320

Re: Pan Am and the 747-400

I often imagine what PanAm would be like today had she survived, grown and was equal in size to one of the US3. With 748i’s, 787’s and A220’s! What would international First Class looked like? PanAm lounges. A barely changed livery. In an alternate universe where PA survived and a different carrier...

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by DocLightning
Sat Sep 07, 2019 9:35 pm
Forum: Civil Aviation
Topic: B747 with 550 onboard hard landing in Nigeria
Replies: 38
Views: 17951

Re: B747 with 550 onboard crash lands in Nigeria

Saharareporters say that it is a 743 but it's a 744 (are there even any more 743s? I didn't think so). 5N-DBK is LN 1095, delivered to KE 26 November 1996, stored 7/2016, then delivered to Max Air 25 June 2017. PW 4056 engines.

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by DocLightning
Fri Sep 06, 2019 6:47 pm
Forum: Non-Aviation
Topic: Robocalls
Replies: 25
Views: 917

Re: Robocalls

Have never been robocalled. It must not happen on the west coast very much. 12 times yesterday between 8AM and 9AM. I can't shut off my phone because hospitals call me on it. It needs to stop. Create a contact, call it scammer (or a-holes), then block the contact. Every time you get one, add it to ...

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by DocLightning
Fri Sep 06, 2019 4:52 am
Forum: Non-Aviation
Topic: Robocalls
Replies: 25
Views: 917

Re: Robocalls

Aaron747 wrote:
Have never been robocalled. It must not happen on the west coast very much.


12 times yesterday between 8AM and 9AM.

I can't shut off my phone because hospitals call me on it. It needs to stop.

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by DocLightning
Fri Sep 06, 2019 12:19 am
Forum: Civil Aviation
Topic: Incident: 777-300ER Aeroflot at Moscow (SVO)
Replies: 13
Views: 6039

Re: Incident: 777-300ER Aeroflot at Moscow (SVO)

ikramerica wrote:
Even for an enthusiast site, is this news?


Any IRROPS is appropriate here.

Now, will it buff out, is this a job for speed tape, or is this a write off? :stirthepot:

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by DocLightning
Tue Sep 03, 2019 8:00 pm
Forum: Civil Aviation
Topic: American Airlines MD-80 Retirement Discussion Thread
Replies: 648
Views: 115427

Re: American Airlines MD-80 Retirement Discussion Thread

My last (and probably final) MD-80 flight was on N971TW on 28 September of last year. It had been a good decade since my last MD-80 flight and I remember noticing how much more connected I felt to the experience of flight aboard that airplane. Modern narrowbodies seem to insulate passengers from the...

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by DocLightning
Tue Sep 03, 2019 5:01 am
Forum: Technical/Operations
Topic: A350 NEO - ULR Redundant?
Replies: 19
Views: 2232

Re: A350 NEO - ULR Redundant?

Also BLADE only works when one holds extremely high manufacturing tolerances, which adds a lot of cost to build and maintain so you'd only use it when it paid for itself. And BLADE stops working when a bug gets smushed on the leading edge, at least in that small section. That's something that they'...

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by DocLightning
Mon Sep 02, 2019 10:55 pm
Forum: Technical/Operations
Topic: What is a maximum engine fan diameter on A350 & 787?
Replies: 23
Views: 2952

Re: What is a maximum engine fan diameter on A350 & 787?

From this document: https://www.boeing.com/resources/boeingdotcom/commercial/airports/acaps/787.pdf On the 788 there are 0.74 and 0.71 meters clearance between the bottom of the engine cowling and the ground for GE and RR, respectively at max taxi weight. For the 789 there are 0.69 and 0.71 meters c...

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by DocLightning
Mon Sep 02, 2019 10:39 pm
Forum: Technical/Operations
Topic: How will ultrafan seal the variable pitch fan?
Replies: 18
Views: 4730

Re: How will ultrafan seal the variable pitch fan?

If you do a news search of ultrafan "variable pitch" in DuckDuckGo, the most recent hit from a standard aviation media website is from 5 years ago, so I think it's safe to assume that variable pitch won't be a feature. Since Rolls Royce is targeting long-range engines with its first Ultra...

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by DocLightning
Sun Sep 01, 2019 5:52 pm
Forum: Civil Aviation
Topic: 31-Aug-2019: Bad day for Turkish Airlines on new Istanbul Airport, two incidents.
Replies: 11
Views: 4913

Re: 31-Aug-2019: Bad day for Turkish Airlines on new Istanbul Airport, two incidents.

Karlsands wrote:
DocLightning wrote:
I'm curious to know how that 738 wound up in the dirt.

Yeah, what the hell, looks bone dry out there


It's Turkey in August, so it's going to be hot. So we agree that the airplane did not slide on water or ice, so that leaves crew error or mechanical failure.

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by DocLightning
Sun Sep 01, 2019 5:47 pm
Forum: Civil Aviation
Topic: Hawaiian 9981 BFM-SEA circling SeaTac
Replies: 14
Views: 4413

Re: Hawaiian 9981 BFM-SEA circling SeaTac

777Mech wrote:
I'm pretty sure the touch and gos was for crew training, and I believe ATS in PAE does their WiFi installations, so might as well get some practice in on a delivery flight.


I thought HA did not offer onboard internet. Or is this just for their streaming WiFi?

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by DocLightning
Sun Sep 01, 2019 5:01 pm
Forum: Civil Aviation
Topic: Is consolidation over in the US ?
Replies: 117
Views: 12331

Re: Is consolidation over in the US ?

What's this obsession with mergers and consolidation? It's as if some people on here won't be happy until the US is left with a single carrier. It tends to happen. I have to say that this last set of mega-mergers didn't work out as horribly as I had imagined. NW (I think my distaste for that carrie...

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by DocLightning
Sun Sep 01, 2019 4:52 pm
Forum: Civil Aviation
Topic: The first Airbus A320 to break the 30-year in service mark
Replies: 136
Views: 36047

Re: The first Airbus A320 to break the 30-year in service mark

And of course, they expected, that only 700 A320 will be build...LOL. I think they seriously overestimated how well the A340 would do and seriously underestimated the A330, as well. Then again, can you imagine that the men designing the 737 would expect that their grandkids would still be building ...

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by DocLightning
Sat Aug 31, 2019 5:28 am
Forum: Technical/Operations
Topic: Winglets and Raked Wingtips — A Couple of Questions
Replies: 17
Views: 2531

Re: Winglets and Raked Wingtips — A Couple of Questions

In addition to what GalaxyFlyer said, the benefits of these devices are relatively modest, in the range of 5%. So it took a fair amount of research (time) to develop wingtip devices that would maximize benefit while minimizing weight and additional drag. Keep in mind that these devices increase the ...

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by DocLightning
Fri Aug 30, 2019 12:00 am
Forum: Civil Aviation
Topic: Canadian lobster to China
Replies: 15
Views: 4473

Re: Canadian lobster to China

TWA902fly wrote:
sturmovik wrote:
Sounds like a job for the 757 :D


Nope, 757s only fly fish - not lobster. And only from Iceland.



I'm pleased that it took only five replies in to get to 757s, fish, and Iceland. Good work, boys. :thumbsup:

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by DocLightning
Wed Aug 28, 2019 6:40 pm
Forum: Technical/Operations
Topic: B777 Engine Identification
Replies: 9
Views: 1709

Re: B777 Engine Identification

I know that the -200LR, -F, and -300ER have the GE90-115 as the only option, so those aircraft The - 200F uses GE90-110's. As does the -200LR. But the GE90-110 is physical identical and interchangeable with the -115 with the only difference being a software plug. Having 115klbf engines on the short...

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by DocLightning
Wed Aug 28, 2019 5:13 am
Forum: Technical/Operations
Topic: Does the ailerons on the Airbus A220 droop because it is a fly-by wire aircraft?
Replies: 16
Views: 4481

Re: Does the ailerons on the Airbus A220 droop because it is a fly-by wire aircraft?

What always puzzled me is that on the 777 and 787, the inboard ailerons droop way down as thrust is applied at take off. As the plane goes down the runway, they go up, almost too high, then further down the runway, they droop back to whatever flap setting is selected. On the 777 and 787, hydraulics...

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by DocLightning
Mon Aug 26, 2019 9:50 pm
Forum: Civil Aviation
Topic: Captain Al Haynes has Flown West (UA232)
Replies: 63
Views: 11283

Re: Captain Al Haynes has Flown West (UA232)

Positive rate, gear up. Fair skies and godspeed, Captain.

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by DocLightning
Mon Aug 26, 2019 8:51 pm
Forum: Civil Aviation
Topic: UAL139 Engine Failure - Returns to KEF
Replies: 10
Views: 3539

Re: UAL139 Engine Failure - Returns to KEF

MIflyer12 wrote:
Is United going to go all Sun Country on passengers and just leave them there?!


I think most airlines know not to do that now. Especially because EU passenger protections might kick in in this case and that would be...bad.

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by DocLightning
Mon Aug 26, 2019 4:05 am
Forum: Civil Aviation
Topic: Why didn’t UA order the 77W until they needed a 744 replacement?
Replies: 40
Views: 6591

Re: Why didn’t UA order the 77W until they needed a 744 replacement?

From what I've gathered, Boeing also offered UA massive discounts on the 773ER as well. Boeing basically allowed UA to convert 788 orders to 77W orders with no additional capital cost (as per comments by Mr. Smisek on the deal at the time), which is insanely cheap for a 77W. At the time, Boeing was...

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by DocLightning
Sun Aug 25, 2019 11:19 pm
Forum: Civil Aviation
Topic: maintenance mishap causes extensive damage to an Emirates Airbus A380
Replies: 73
Views: 19294

Re: maintenance mishap causes extensive damage to an Emirates Airbus A380

Also, the L1 door was torn off its hinges and you can see it lying on top of the maintenance platform at upper frame right. Moreover, someone on Reddit who says he works on A380s says that in this situation, the #2&3 engines will almost certainly contact the ground, and if that's the case the co...

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by DocLightning
Sat Aug 24, 2019 2:41 am
Forum: Travel, Polls & Preferences
Topic: Why didn't McDonnell Douglas make the MD-11 a twinjet?
Replies: 19
Views: 2875

Re: Why didn't McDonnell Douglas make the MD-11 a twinjet?

Anything less than 3 jets wouldn't have been any use to customers wanting an aircraft for Trans-oceanic ops at the time. The DC10 was a success before and the idea of twin engined aircraft crossing oceans wasn't one many were entertaining, as this was Pre ETOPS as we know today. In the mid-1980s, t...

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by DocLightning
Thu Aug 22, 2019 5:29 am
Forum: Non-Aviation
Topic: Disloyal jews - anti semitism?
Replies: 45
Views: 1878

Re: Disloyal jews - anti semitism?

While there are plenty of notable Jewish Conservatives, we tend to bend pretty firmly liberal. But most of all, we have all been taught extensively about the long tradition of antisemitism in the West. The "blood libel," if you will, of the disloyal Jews is an old trope. We have heard this...

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by DocLightning
Mon Aug 19, 2019 7:58 am
Forum: Travel, Polls & Preferences
Topic: Are the B777-200/200ER/300 still in production?
Replies: 11
Views: 2700

Re: Are the B777-200/200ER/300 still in production?

The frames were not changed despite the external differences between them and prior 777s. You could argue it either way. When Boeing designed the longer-range 777s, they knew that the 777-300ER would take the majority of the orders. They also were going to make the 777F. So given that that they had...

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by DocLightning
Mon Aug 19, 2019 5:59 am
Forum: Travel, Polls & Preferences
Topic: Future 747-8 orders?
Replies: 26
Views: 2185

Re: Is the B747-8 passenger still in production?

I think Boeing retains the capability, but they have no backlog.

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by DocLightning
Sun Aug 18, 2019 8:06 pm
Forum: Technical/Operations
Topic: Do UA 777 pilots fly all 777 types in the fleet?
Replies: 12
Views: 3408

Do UA 777 pilots fly all 777 types in the fleet?

UA has a diverse fleet of 777s. The L-UA fleet features PW 772A and 772ER fleets, while the L-CO fleet consists of GE 772ER frames. The postmerger fleet also features 777-300ERs.

So now that the merger is in the past, are pilots flying L-UA and L-CO aircraft? Are they also flying 77Ws?

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by DocLightning
Sat Aug 17, 2019 10:28 pm
Forum: Civil Aviation
Topic: Delta Pax sit on Delayed JFK-MIA Flight for 8 Hours, Fight Erupts
Replies: 28
Views: 7727

Re: Delta Pax sit on Delayed JFK-MIA Flight for 8 Hours, Fight Erupts

As long as passengers are given a deplane opportunity via stairs and bus or gate and as long as cabin door is open...No passenger is being held there against their will This is important. I was recently on an AA mad dog where takeoff was rejected due to the FO’s attitude indicator failing on takeof...

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by DocLightning
Sat Aug 17, 2019 9:49 am
Forum: Civil Aviation
Topic: US customs outage
Replies: 9
Views: 2627

Re: US customs outage

777222LR wrote:
A customs agent was probably on a.net and downloaded the file from the "Update your Adobe Flash" pop-up ad.


:lol: :lol: :lol:

Or answered one of those IRS phone calls.

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by DocLightning
Sat Aug 17, 2019 9:16 am
Forum: Civil Aviation
Topic: Delta Pax sit on Delayed JFK-MIA Flight for 8 Hours, Fight Erupts
Replies: 28
Views: 7727

Re: Delta Pax sit on Delayed JFK-MIA Flight for 8 Hours, Fight Erupts

I don't know about this particular instance, but I have heard of many occurrences (not 8 hours but a couple of hours) of boarding and waiting in apron to avoid financially compensating and/or re-booking via other airlines. The three-hour rule exists to make that unaffordable for airlines. For a wai...

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by DocLightning
Thu Aug 15, 2019 9:25 pm
Forum: Civil Aviation
Topic: Ural Airlines A321 VQ-BOZ 15 august 2019 Moscow emergency landing
Replies: 187
Views: 28965

Re: Ural Airlines A321 VQ-BOZ 15 august 2019 Moscow emergency landing

jupiter2 wrote:
But is it a write off ?


The engines sure are. The rest will buff right out with a touch of speed tape.

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by DocLightning
Thu Aug 15, 2019 9:20 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 3976
Views: 514911

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Naah. They will just mount the third engine at the tail, with no vertical stab. They will program MCAS 3.0, which ensures lateral stability with state-of-the-art differential thrust. ...which will be based on input from one single yaw vane mounted on top of the fuselage where it's difficult to serv...

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