Search found 21431 matches

by DocLightning
Mon Jul 22, 2019 2:37 pm
Forum: Civil Aviation
Topic: DL Planes to Carry Narcan for Drug Overdose Prevention
Replies: 88
Views: 6745

Re: DL Planes to Carry Narcan for Drug Overdose Prevention

It can 1) save a diversion and 2) save a lot of bad press for the airline. Would it really save a diversion? I'd think that they'd still want the person off the plane and under real medical care. Depends. If they're flying JFK-SFO and the issue occurs while they are at FL 350 just west of SMF, it c...

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by DocLightning
Mon Jul 22, 2019 2:30 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 873
Views: 126620

Re: Boeing 737MAX Grounded Worldwide Q3 2019

In any event, I see no way that the MAX program returns an overall program profit. Same as the 787. So Boeing will have its cash cow - 737 - never make a profit along with the 787 which requires a paper write off, but Chpt.11 is so far outside the realm of possibility that when suggested as a possi...

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by DocLightning
Mon Jul 22, 2019 8:20 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 873
Views: 126620

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Seriously, I can’t see any circumstances where MAX never flies again. Absolute worst case I can see is a complete recertification as a non-NG 737 variant. With the backlog it’s got, there’s no way Boeing can just shrug their shoulders and not get TPFKAM* back in the air. While I agree a "never...

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by DocLightning
Mon Jul 22, 2019 5:17 am
Forum: Civil Aviation
Topic: DL Planes to Carry Narcan for Drug Overdose Prevention
Replies: 88
Views: 6745

Re: DL Planes to Carry Narcan for Drug Overdose Prevention

Many seem to think that Narcan is only for "addicts". :checkmark: :thumbsup: The worst fake argument is "If it would save just one life". I can't say whether the people who came up with this idea at DL had genuinely honorable motives or not, but even if they are nothing but cold...

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by DocLightning
Mon Jul 22, 2019 5:09 am
Forum: Non-Aviation
Topic: Disappearances in American National Parks
Replies: 30
Views: 2388

Re: Disappearances in American National Parks

I think this can be explained by survivorship bias. The list of circumstances laid out in the OP detail a very complicated SAR operation with a relatively poor chance for success. *lone hikers *disappearance in the hours before sundown *poor weather after the disappearance complicates SAR and also w...

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by DocLightning
Sun Jul 21, 2019 5:03 am
Forum: Technical/Operations
Topic: Topics for high school chemistry project (IB Chemistry IA) related to aviation?
Replies: 6
Views: 368

Re: Topics for high school chemistry project (IB Chemistry IA) related to aviation?

Airplane hydraulic fluid is an interesting topic. Why do they choose the ones they do? (Hint: temperature tolerance.)

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by DocLightning
Sat Jul 20, 2019 2:27 am
Forum: Civil Aviation
Topic: Poland's proposed new mega airport CPK reveals competing design concepts
Replies: 68
Views: 9210

Re: Poland's proposed new mega airport CPK reveals competing design concepts

KLDC10 wrote:
Some of the concepts look a little extravagant, no? In particular, the one with train tracks at multiple levels seems to be little more than an architectural pipe dream.


It looks like something off the cover of an Asimov novel, no?

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by DocLightning
Thu Jul 18, 2019 4:49 am
Forum: Civil Aviation
Topic: A321neo operators alerted over 'excessive pitch' anomaly
Replies: 88
Views: 23363

Re: A321neo operators alerted over 'excessive pitch' anomaly

It's interesting that this issue only affects the A321neo and not the A320neo (so far at least). One would think that the A321 has more pitch authority than the A320 given its greater length than the latter, so it would be less sensitive to any pitch anomaly. The A321 has a longer body than the A32...

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by DocLightning
Wed Jul 17, 2019 12:24 am
Forum: Civil Aviation
Topic: Would A321XLR open the door for non-stops between US west coast and CTS?
Replies: 51
Views: 7542

Re: Would A321XLR open the door for non-stops between US west coast and CTS?

Eastbound, maybe. But westbound is going to require a fuel stop at ANC. This is a 788 route. But where is the demand for a 788 from SFO to CTS going to come from?

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by DocLightning
Mon Jul 15, 2019 5:55 am
Forum: Civil Aviation
Topic: Can DL's A330neo fly SEA-SIN/SYD!?
Replies: 35
Views: 7561

Re: Can DL's A330neo fly SEA-SIN/SYD!?

ibthebigd wrote:
Another example of Delta dropping the ball on the 787...


Why? The 787 can do SEA-SYD but why does DL need that? If there is a big enough market for SEA-SYD, DL will put an A359 on it.

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by DocLightning
Sun Jul 14, 2019 4:26 pm
Forum: Non-Aviation
Topic: NYC Power Outage
Replies: 22
Views: 1456

Re: NYC Power Outage

I remember the 2003 Northeast Coast blackout which lasted about 2 days, it was amazing to see the effect it had on everything and everyone, was like something out of an end of days film without the violence :D I was on the very western end of that. It's amazing how unreliable the power is here. Whe...

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by DocLightning
Sat Jul 13, 2019 7:25 pm
Forum: Travel, Polls & Preferences
Topic: Atlas Air last 747 pax operator in North America?
Replies: 10
Views: 1540

Re: Atlas Air last 747 pax operator in North America?

KE, LH and BA all operate regularly scheduled pax 747 operations here to N. America along with others. (B744s and B748s) What about this one? Technically a passenger jetliner. 5570755 Technically not a Boeing 747. It's a VC-25 and it is not a passenger airliner, but rather an airforce aircraft.

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by DocLightning
Sat Jul 13, 2019 7:06 pm
Forum: Civil Aviation
Topic: Currently flying: fastest circumnavigation of the earth via both poles
Replies: 50
Views: 7816

Re: Currently flying: fastest circumnavigation of the earth via both poles

m007j wrote:
No chance in HELL they're giving that guy one of the blue suits, especially not with pilot's wings on it.


My apologies, I thought it was slang for a business suit

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by DocLightning
Fri Jul 12, 2019 4:43 am
Forum: Travel, Polls & Preferences
Topic: United and Spiderman amenity kits
Replies: 4
Views: 765

Re: United and Spiderman amenity kits

janders wrote:
Its simply a marketing deal with Marvel for a 5-week period to build buzz for the movie. Same reason the UA safety video is spidermand themed also.


Well, of course. You didn't think UA was doing this for free, did you?

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by DocLightning
Fri Jul 12, 2019 4:42 am
Forum: Civil Aviation
Topic: Currently flying: fastest circumnavigation of the earth via both poles
Replies: 50
Views: 7816

Re: Currently flying: fastest circumnavigation of the earth via both poles

BravoOne wrote:
This is nothing more than a stunt but a good one for avgeeks. Who is the guy in the Gsuit?


That's Akbar Al-Baker, CEO of QR and world-famous loose cannon.

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by DocLightning
Thu Jul 11, 2019 2:53 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 873
Views: 126620

Re: Boeing 737MAX Grounded Worldwide Q3 2019

maint123 wrote:
I understand your distress as a American, but 2 crashes with 350 dead within 6 months, does not point to a rarely entered envelope.


They did not enter the relevant envelope. A broken AOA vane told MCAS that they were in that envelope when they weren't.

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by DocLightning
Tue Jul 09, 2019 10:47 pm
Forum: Civil Aviation
Topic: Currently flying: fastest circumnavigation of the earth via both poles
Replies: 50
Views: 7816

Re: Currently flying: fastest circumnavigation of the earth via both poles

PhilMcCrackin wrote:
That's funny - the cargo guys seem to be able to manage to feed themselves just fine.


Not for 48 straight hours they don't.

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by DocLightning
Tue Jul 09, 2019 9:25 pm
Forum: Civil Aviation
Topic: Currently flying: fastest circumnavigation of the earth via both poles
Replies: 50
Views: 7816

Re: Currently flying: fastest circumnavigation of the earth via both poles

I'm curious what the F/As are needed for? This will be a two-day trip with four flight crew aboard. Stops at each airport are limited to 45 minutes. The crew must be fed during this time and it would be...inconvenient...to have any of them get food poisoning during the flight, so someone must be ab...

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by DocLightning
Tue Jul 09, 2019 9:12 pm
Forum: Civil Aviation
Topic: Could the 787 be scaled to create the 797?
Replies: 52
Views: 9218

Re: Could the 787 be scaled to create the 797?

Only if Section 41 (cockpit) could be grafted onto a narrower fuselage, but that's about it. The 767 Section 41 cockpit was used on the 777. IIRC the "adaptor" section to increase the cockpit diameter to meet up with the larger fuselage section was quite a design challenge, so Boeing had ...

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by DocLightning
Tue Jul 09, 2019 9:10 pm
Forum: Civil Aviation
Topic: Engine spinner detaches mid-flight.
Replies: 45
Views: 15175

Re: Engine spinner detaches mid-flight.

Why is the bearing glowing orange?

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by DocLightning
Tue Jul 09, 2019 4:47 pm
Forum: Civil Aviation
Topic: KLM 747-400ERF loses flap during approach
Replies: 34
Views: 7769

Re: KLM 747-400ERF loses flap during approach

That flap looks astonishingly intact, considering it fell from considerable hight. It's pretty light (interior is honeycomb foam), so terminal velocity is not that high and it's meant to take quite a bit of force. I'm astonished that the two large pieces of metal just snapped like that. Corrosion p...

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by DocLightning
Tue Jul 09, 2019 4:22 pm
Forum: Civil Aviation
Topic: What's going to happen after the 787/a350 orderbooks are completed?
Replies: 32
Views: 5300

Re: What's going to happen after the 787/a350 orderbooks are completed?

As orders begin to slow and technology advances, Boeing will probably look at upgrading the engines and introducing a 787NG, similar to what was done with the 777 and the GE-90-110/115 re-engine. We could also see a 787-F variant introduced along the way. But the 787 is a solid design will sell in i...

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by DocLightning
Mon Jul 08, 2019 1:44 am
Forum: Civil Aviation
Topic: Virgin Atlantic flight cabin fire
Replies: 69
Views: 14398

Re: Virgin Atlantic flight cabin fire

They were 30 NM from the airport at 28,000' when they started their descent, flew past the airport for 27 NM, and circled back around to land to the SE. When abeam the airport, they were still at FL200. When they made the turn, they were still at 10,000'. They were doing over 3,500 FPM almost the e...

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by DocLightning
Sun Jul 07, 2019 8:38 pm
Forum: Civil Aviation
Topic: Virgin Atlantic flight cabin fire
Replies: 69
Views: 14398

Re: Virgin Atlantic flight cabin fire

I have a question about this flight. If you look at the track on FlightAware (https://flightaware.com/live/flight/VIR138/history/20190704/2310Z/KJFK/KBOS), they began their descent just about over the CT/MA border and descended quickly, but then flew past BOS, did a loop, and then landed. Was this r...

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by DocLightning
Sun Jul 07, 2019 6:59 pm
Forum: Non-Aviation
Topic: California rocked again...
Replies: 35
Views: 1852

Re: California rocked again...

I'm in Santa Barbara right now and we felt it while sitting in a Yogurtland. You could tell it was very big but far away because it was a slow side-to-side motion that was more vertigo-inducing, but strong enough to swing the doors on the store shut and make clothes on a rack in a clothes shop acros...

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by DocLightning
Sat Jul 06, 2019 4:41 pm
Forum: Civil Aviation
Topic: Why did AA choose ORD as its TPAC Gateway instead of DFW?
Replies: 69
Views: 10111

Re: Why did AA choose ORD as its TPAC Gateway instead of DFW?

flyingclrs727 wrote:
All of the Asian continent is north of the equator. Even Singapore, which is on an island south of Asia, is a little over one degree north of the equator.


Depends on whether you call Indonesia part of Asia or not. The Asian manland is north of the equator, certainly.

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by DocLightning
Sat Jul 06, 2019 4:40 pm
Forum: Civil Aviation
Topic: Klax and surrounding airfields in regards to earthquakes.
Replies: 28
Views: 3917

Re: Klax and surrounding airfields in regards to earthquakes.

Quake downgraded from 7.1 to 6.9. USGS still says 7.1. But their website is being weird. https://earthquake.usgs.gov/earthquakes/map/#%7B%22feed%22%3A%2230day_sig%22%2C%22search%22%3Anull%2C%22listFormat%22%3A%22default%22%2C%22sort%22%3A%22newest%22%2C%22basemap%22%3A%22terrain%22%2C%22autoUpdate%...

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by DocLightning
Sat Jul 06, 2019 4:14 am
Forum: Civil Aviation
Topic: Klax and surrounding airfields in regards to earthquakes.
Replies: 28
Views: 3917

Re: Klax and surrounding airfields in regards to earthquakes.

I'm on vacation in Santa Barbara. This one was definitely noticeable. A door on the store I was in swung closed and there was a profound sense of vertigo. But if I'd been on a plane on the ground, I would have just assumed that it was luggage being loaded or something. This one was exciting, but not...

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by DocLightning
Fri Jul 05, 2019 5:04 am
Forum: Civil Aviation
Topic: Why did AA choose ORD as its TPAC Gateway instead of DFW?
Replies: 69
Views: 10111

Re: Why did AA choose ORD as its TPAC Gateway instead of DFW?

Almost the entire Asian continent lies north of the equator, which means that all great circle routes from the USA will tend north, so a southern city like Dallas is at a disadvantage because it is further from most of Asia than Chicago. Even in an era when aircraft can fly 16 hour routes, ORD is re...

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by DocLightning
Fri Jul 05, 2019 3:51 am
Forum: Travel, Polls & Preferences
Topic: The Future of Boeing
Replies: 35
Views: 2349

Re: The Future of Boeing

I doubt that Boeing is going to go under anytime in the forseeable future. BCA will probably go under when something other than aircraft replaces aircraft (whatever that may be...I can't even imagine). However, I very much hope that there is some serious soul-searching going on there with respect to...

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by DocLightning
Fri Jul 05, 2019 3:42 am
Forum: Civil Aviation
Topic: How do Airlines make money on airfares less than $100?
Replies: 74
Views: 14512

Re: How does United make money on airfares less than $100?

Suppose it costs an airline 13¢ per mile to fly a passenger. It might cost them 11.5¢ per mile to fly that same seat empty. So given that they have to fly the seat somewhere, if they can sell that seat for a minimum of 1.5¢/mile, then at least they have cut their losses, even if they don't make mone...

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by DocLightning
Fri Jul 05, 2019 3:12 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 873
Views: 126620

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I'm shocked that they are still building 40 frames a month in Renton. It shows loyalty to their workers but at some point they'll have to stop. Loyalty to their workers likely has little to do with it. Boeing's stock has remained relatively stable (give the circumstances) but, per what I've heard o...

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by DocLightning
Thu Jul 04, 2019 5:51 pm
Forum: Technical/Operations
Topic: Hot towel service logistics
Replies: 17
Views: 2647

Re: Hot towel service logistics

zanl188 wrote:
Chemtrails system contains a heat exchanger to heat towel water. Heat exchanger also adds a perfume and knock out drops, makes everyone go nighty nite smelling good.


Is it bad that I went looking for a laugh react? Maybe the chemtrails got to me.

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by DocLightning
Wed Jul 03, 2019 2:15 am
Forum: Civil Aviation
Topic: DCA to close for July 4th Celebration
Replies: 116
Views: 13441

Re: DCA to close for July 4th Celebration

Regardless of politics, can't we all agree that there should have been WAY more than two days' warning?

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by DocLightning
Tue Jul 02, 2019 8:14 pm
Forum: Civil Aviation
Topic: Disney launching their own airline?
Replies: 160
Views: 22465

Re: Disney launching their own airline?

Hahaha I find it ironic that the “Walmart” of the seas is worried about brand image. While the actual Carnival brand is downmarket, they own many brands. *Costa *Cunard *Holland-America *P&O *Princess *AIDA *Seabourn In particular, Cunard and Seabourn are very upmarket. To get back to the point...

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by DocLightning
Tue Jul 02, 2019 8:05 pm
Forum: Technical/Operations
Topic: Hot towel service logistics
Replies: 17
Views: 2647

Hot towel service logistics

In premium cabins on many flights, a hot towel service is offered before the meal.

1) How are the towels delivered to the aircraft? Are they already moistened?
2) How are the towels heated prior to the service?

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by DocLightning
Mon Jul 01, 2019 5:32 am
Forum: Civil Aviation
Topic: United A319 emergency landing at EWR (June 30)
Replies: 34
Views: 10299

Re: Newark ground stop, what is going on?

So in 13 days, UA has managed to close EWR with a 752 and now an A319. At least this aircraft should be back in the air in a few weeks. I'm not saying that this is a sign of anything amiss at UA. It's a huge airline and bad luck happens. Incidents don't seem to be related. But during the MAX groundi...

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by DocLightning
Sat Jun 29, 2019 7:47 am
Forum: Civil Aviation
Topic: Air Tahiti Nui retires A343 F-OSUN, PPT-HNL-VCV on 3 engines
Replies: 51
Views: 13437

Re: Air Tahiti Nui retires A343 F-OSUN, PPT-HNL-VCV on 3 engines

That first pic is stunning, looks like it has afterburners. Never seen anything like that glow from behind the engines on any commercial airliner turbofan before. The Bae-146 would do it because the engines were GTFs. But why would the glow be visible on a CFM56? The “ball” of expanding LPT stages ...

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by DocLightning
Fri Jun 28, 2019 1:04 am
Forum: Civil Aviation
Topic: United Continental Holdings changing name to United Airlines Holdings
Replies: 44
Views: 5701

Re: United Continental Holdings changing name to United Airlines Holdings

kiowa wrote:
Strange place to put effort into. What is the purpose?


Probably took some paralegal 15 minutes and a lawyer less than 30 seconds. Given that the Continental brand is dead, it's a sensible move.

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by DocLightning
Wed Jun 26, 2019 11:22 pm
Forum: Civil Aviation
Topic: TAP A330-900neo crew and passengers reporting dizziness and vomiting
Replies: 35
Views: 13996

Re: TAP A330-900neo crew and passengers reporting dizziness and vomiting

Other than the engine itself, is the A339 bleed air system any different from the A332/A333?

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by DocLightning
Wed Jun 26, 2019 7:49 pm
Forum: Travel, Polls & Preferences
Topic: Your least favorite aircraft type ?
Replies: 86
Views: 4800

Re: Your least favorite aircraft type ?

Boeing narrowbodies (737/757). I'm tired of my shoulders being crammed against my neighbor's. It is different on the A320 family.

And also, I'm not a huge A380 fan. Not only Embarcation/disembarcation take a while, but also the walls are so thick that you can barely see out the window.

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by DocLightning
Tue Jun 25, 2019 7:45 pm
Forum: Civil Aviation
Topic: Buzzsaw sound on takeoff
Replies: 54
Views: 10092

Re: Buzzsaw sound on takeoff

However, waves in and of themselves do not cause drag.. Waves generated by the ship carry energy away that is provided by the movement of the ship. So they do cause drag. You can get into some strange cause/effect loops in fluid dynamics, but a wave traveling away from the ship cannot act directly ...

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by DocLightning
Tue Jun 25, 2019 7:34 pm
Forum: Civil Aviation
Topic: Freebird A320 hit by jetbridge at Brussels
Replies: 15
Views: 2886

Re: Freebird A320 hit by jetbridge at Brussels

That will buff right out ! Bring me the speed tape ! Probably a write-off. :duck: :stirthepot: In all seriousness, this bird has a bit of a colorful history. https://www.airfleets.net/ficheapp/plane-a320-2922.htm *First flew 5 October 2006 and was delivered on the 27th of that month to Air Deccan a...

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by DocLightning
Tue Jun 25, 2019 2:56 am
Forum: Civil Aviation
Topic: Buzzsaw sound on takeoff
Replies: 54
Views: 10092

Re: Buzzsaw sound on takeoff

Today's cruise ships are designed with hull shapes that create secondary waves that self cancel the primary wake. The result is a relatively tiny wake that would otherwise be huge and a large disruption to other ships. The reason for the bulbous bow is that it makes a wave in front of the bow that ...

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by DocLightning
Mon Jun 24, 2019 12:23 am
Forum: Civil Aviation
Topic: Buzzsaw sound on takeoff
Replies: 54
Views: 10092

Re: Buzzsaw sound on takeoff

This adds to what I was going to mention about the long period and sometimes variable period womp, womp, womp some twins experience. Its also a harmonic when the two engines, not spinning at the same exact speed, create a not so pleasant combination. You mean a beats frequency? https://en.wikipedia...

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by DocLightning
Sun Jun 23, 2019 9:58 pm
Forum: Civil Aviation
Topic: Buzzsaw sound on takeoff
Replies: 54
Views: 10092

Re: Buzzsaw sound on takeoff

I think though that the origin of the rattling are not the shockwaves. Dozens of blades rotating 50 times per second would not be perceptible to the human ear/brain as a high frequency rattling/buzz saw but as a constant sound. Plus the noise is most perceptible at a normal angle rather than from t...

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by DocLightning
Fri Jun 21, 2019 7:56 pm
Forum: Civil Aviation
Topic: More details on BOOM SST at Paris. SFO to Toyko in 5.5 hours. First flight in 2020...
Replies: 102
Views: 12835

Re: More details on BOOM SST at Paris. SFO to Toyko in 5.5 hours. First flight in 2020...

Back to fuel efficiency. Using the the physics principle that ke=½ m*v^2. Not a good equation in this case. The fuel cost of accelerating the aircraft is negligible in the face of air resistance and also climbing. The issue here is that the aircraft must be stronger (heavier) to handle the aerodyna...

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by DocLightning
Fri Jun 21, 2019 2:53 pm
Forum: Civil Aviation
Topic: More details on BOOM SST at Paris. SFO to Toyko in 5.5 hours. First flight in 2020...
Replies: 102
Views: 12835

Re: More details on BOOM SST at Paris. SFO to Toyko in 5.5 hours. First flight in 2020...

That's a bit underwhelming in terms of time savings versus the subsonic flights which are currently blocked around 9.5 hours. I'd hope a flight at Mach 2.2 would take under half the time. That's what I'm thinking. You want me to pay a J-class fare to sit in a Y-class seat for 5.5 hours when I could...

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by DocLightning
Thu Jun 20, 2019 4:09 pm
Forum: Civil Aviation
Topic: United 757-200 hard landing at EWR
Replies: 166
Views: 39462

Re: What’s the emergency at EWR?

TWA772LR wrote:
I respect you big time Doc, but AA did have over 1/3 of their fleet grounded not too long ago...


Are you telling me and everyone else on this board that AA's fleet is not well-maintained and has incomplete maintenance records?

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by DocLightning
Wed Jun 19, 2019 10:51 pm
Forum: Civil Aviation
Topic: United 757-200 hard landing at EWR
Replies: 166
Views: 39462

Re: What’s the emergency at EWR?

Wacker1000 wrote:
I'm guessing United would want something well maintained with complete maintenance records.....


AA might not be doing so hot on the customer satisfaction side of things, but I have absolute confidence in their maintenance and safety.

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