Search found 22233 matches

by DocLightning
Tue Oct 19, 2021 7:55 pm
Forum: Technical/Operations
Topic: Is the UDF Engine Back from the Dead?
Replies: 39
Views: 8508

Re: Is the UDF Engine Back from the Dead?

CowAnon wrote:
This apparently was one of McDonnell Douglas's earlier concepts for a DC-10 derivative:


Very cool, but wouldn't moving the engines aft of the wing require moving the wing further aft to accommodate the new CG?

Jump to post
by DocLightning
Tue Oct 19, 2021 7:38 pm
Forum: Civil Aviation
Topic: What are the latest updates regarding PW4000-112 and when is it estimated to return to service?
Replies: 29
Views: 4723

Re: What are the latest updates regarding PW4000-112 and when is it estimated to return to service?

bbj2captain wrote:
Currently, UAL is modifying the inlet cowl as a "work ahead" of regulators.


Why would a modification to the inlet cowl prevent an uncontained failure? Or are we talking about the fan case?

Jump to post
by DocLightning
Mon Oct 18, 2021 7:28 pm
Forum: Travel, Polls & Preferences
Topic: Your shortest flight on a widebody and longest flight on a narrowbody
Replies: 97
Views: 3368

Re: Your shortest flight on a widebody and longest flight on a narrowbody

I'm guessing you departed JFK on a Wednesday- that was the traditional quietest transatlantic day where you often saw flights not operate, operate with smaller equipment, or flights combined. SR usually operated JFK-GVA & JFK-ZRH both daily except Wednesday when there was just JFK-GVA-ZRH. That...

Jump to post
by DocLightning
Sun Oct 17, 2021 8:03 pm
Forum: Travel, Polls & Preferences
Topic: Your shortest flight on a widebody and longest flight on a narrowbody
Replies: 97
Views: 3368

Re: Your shortest flight on a widebody and longest flight on a narrowbody

I think my shortest widebody flight would have been GVA-ZRH (125 nmi) on a SR 743 back in the 1980s. I think it was late 1986. I don't remember how long it was (I was 9) but it was really short. We were going to ZRH but we had come from JFK. For whatever reason, SR did a "milk run" through...

Jump to post
by DocLightning
Wed Oct 13, 2021 8:16 pm
Forum: Civil Aviation
Topic: Updated: LGA Airtrain halted by Governor
Replies: 248
Views: 38250

Re: Updated: LGA Airtrain halted by Governor

blockski wrote:
Are people familiar with the Q70 bus? It seems like there are a lot of reactions to this based on the idea of riding a city bus. It has special branding (LaGuardia Link), luggage racks, etc:


Yes, I took it several times. It seemed to spend more time stopped than moving.

Jump to post
by DocLightning
Wed Oct 13, 2021 8:14 pm
Forum: Travel, Polls & Preferences
Topic: DC-10: Whose (NOT who's!) have you flown on?
Replies: 28
Views: 1001

Re: DC-10: Whose (NOT who's!) have you flown on?

UA
NW
CO
CP
And I think NZ.

I never did make aboard an MD-11

It's a short list, but I've spent a *LOT* of time on DC-10s, mostly NW.

Jump to post
by DocLightning
Wed Oct 13, 2021 7:42 pm
Forum: Civil Aviation
Topic: Updated: LGA Airtrain halted by Governor
Replies: 248
Views: 38250

Re: Updated: LGA Airtrain halted by Governor

To say it again: If you are coming from, say, Manhattan, it would be faster to take the Subway to Jackson Heights, and then transfer to the Q70 bus than it would be to take a much longer subway trip to Willets Point, and then take the AirTrain. Until there's a traffic jam, which happens a lot in NY...

Jump to post
by DocLightning
Tue Oct 12, 2021 8:25 pm
Forum: Travel, Polls & Preferences
Topic: So sick of all these cancelled flights
Replies: 20
Views: 2220

Re: So sick of all these cancelled flights

Why are you absolving travelers of their end of responsibility? We are not in an economic or operational space where people can expect everything to go smoothly right now - if people expect otherwise, that's on them for not doing their homework. Anyone working in almost any industry is aware of the...

Jump to post
by DocLightning
Mon Oct 11, 2021 7:43 pm
Forum: Technical/Operations
Topic: During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?
Replies: 17
Views: 2212

Re: During a standing takeoff on a water-injected aircraft like the early 707, when does the water start?

Somewhere on this forum is a description of the procedure by a retired KLM 747 pilot, probably in this very Tech/Ops forum. If you search, you might be able to find it. And if you do find it, please link it here. I'm not in a place to be doing a deep search at the moment.

Jump to post
by DocLightning
Mon Oct 11, 2021 3:04 pm
Forum: Non-Aviation
Topic: Covid19 - Vaccine News and discussion thread
Replies: 151
Views: 8792

Re: Covid19 - Vaccine News and discussion thread

Neat, thanks! Sorry to bug you about it, but I took a cell biology course this spring and find this kind of thing super interesting. I'd also say that we're at the extent of my personal knowledge about it, so if you want to know more details, you'll need to look up codon optimization. If you learn ...

Jump to post
by DocLightning
Sun Oct 10, 2021 4:34 pm
Forum: Non-Aviation
Topic: Covid19 - Vaccine News and discussion thread
Replies: 151
Views: 8792

Re: Covid19 - Vaccine News and discussion thread

Right, but why are certain tRNAs more abundant in some species and less in others, and is that something that can change over time? There's probably some subtle advantages for certain codons over others that may favor one species vs. another, but most likely it's mostly just random. Primates favor ...

Jump to post
by DocLightning
Sat Oct 09, 2021 8:00 pm
Forum: Non-Aviation
Topic: Covid19 - Vaccine News and discussion thread
Replies: 151
Views: 8792

Re: Covid19 - Vaccine News and discussion thread

So if I'm understanding this correctly, "optimization" depends on relative abundance of tRNAs? Curious how that's controlled biologically. Each species has a different abundance of each tRNA. So, for example (and I'm just pulling these out of my ear) in all organisms, leucine is coded by ...

Jump to post
by DocLightning
Thu Oct 07, 2021 5:31 pm
Forum: Non-Aviation
Topic: Is "Detroit-style" pizza a thing?
Replies: 50
Views: 2394

Re: Is "Detroit-style" pizza a thing?

tys777 wrote:
Thanks Doc! Do you have a preferred type of pan? I know that alone can cause a hot debate.


I use a 9x13" I've seen 10x14" also used. But it has to have high sides. Your regular baking sheet won't do.

Jump to post
by DocLightning
Thu Oct 07, 2021 5:21 pm
Forum: Non-Aviation
Topic: Covid19 - Vaccine News and discussion thread
Replies: 151
Views: 8792

Re: Covid19 - Vaccine News and discussion thread

But, sounds like Pfizer and Roche aren't really that far behind, and apparently got a markedly later start than Merck I appreciate your insight on this subject. Are there any negatives, side effects? I haven't seen the full data, but as it is given orally, stomach upset will most certainly be a pot...

Jump to post
by DocLightning
Wed Oct 06, 2021 3:35 am
Forum: Non-Aviation
Topic: Covid19 - Vaccine News and discussion thread
Replies: 151
Views: 8792

Re: Covid19 - Vaccine News and discussion thread

Merck needed a win after going 0-3 on their first three attempts at getting into the COVID game. It'll be interesting to see what demand is really like for this. I wonder how it'll be identified, prescribed, and administered reliably in the time frame needed since I guess it needs to be started qui...

Jump to post
by DocLightning
Tue Oct 05, 2021 3:12 pm
Forum: Civil Aviation
Topic: Fokker NG jet, an unique opportunity for Boeing?
Replies: 73
Views: 11402

Re: Fokker NG jet, an unique opportunity for Boeing?

As I see it, you're talking about an almost clean-sheet design here. The mold lines of the fuselage stay about the same, but it will need: 1) New wings. 2) Completely new avionics probably including FBW if it's going to be competitive as a new entry, and so with that pretty much every system replace...

Jump to post
by DocLightning
Mon Oct 04, 2021 8:00 pm
Forum: Civil Aviation
Topic: Northwest 747s at MEM during hub years.
Replies: 29
Views: 5621

Re: Northwest 747s at MEM during hub years.

Girl I used to work with transferred to DTW as a Sup, used to complain about having 100+ Must Rides and 40 non-rev pass riders showing up 30 minutes before departure of an already full Minneapolis flight several times a week, creating a nightmare that was almost a daily occurrence. Witnessed the fu...

Jump to post
by DocLightning
Fri Oct 01, 2021 4:10 am
Forum: Civil Aviation
Topic: Why hasn't AA or Delta taken a real swing at SJC?
Replies: 95
Views: 10258

Re: Why hasn't AA or Delta taken a real swing at SJC?

MIflyer12 wrote:

UA has the SFO TPAC hub that neither DL nor AA is ever going to replicate at SJC


Why not? SJC is in a geographic position for business traffic from Asia. DL inherited NWs extensive TPAC network. DL in particular has an opportunity there, while AA has a weaker TPAC presence.

Jump to post
by DocLightning
Thu Sep 30, 2021 8:01 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 3785

Re: 747-8 engine choice

Would the 6.5" bigger fan have fit under wing? That was the issue. Larger engines can be fit under the wing for engine testing purposes, but for regular commercial use, the clearance wasn't adequate. The larger engine size also meant that vortex control devices were installed on the engine cow...

Jump to post
by DocLightning
Wed Sep 29, 2021 8:18 pm
Forum: Travel, Polls & Preferences
Topic: Airbus A330 - Whose have you flown?
Replies: 51
Views: 2474

Re: Airbus A330 - Whose have you flown?

Believe it or not, only HA.

Jump to post
by DocLightning
Wed Sep 29, 2021 8:00 pm
Forum: Non-Aviation
Topic: Is "Detroit-style" pizza a thing?
Replies: 50
Views: 2394

Re: Is "Detroit-style" pizza a thing?

Oh yes it is, as a native Detroiter I am here to tell you! And it is way better than NY or Chicago style. The nonsense from Pizza Hut is unauthentic (full disclosure: I've never actually tried it, but I'm being a curmudgeon and that's my gosh darn right! :old:). A Detroit-style pizza is typified by ...

Jump to post
by DocLightning
Wed Sep 29, 2021 3:34 am
Forum: Travel, Polls & Preferences
Topic: Airbus A340 - Whose have you flown?
Replies: 44
Views: 1637

Re: Airbus A340 - Whose have you flown?

One AF A343 and one LH A346.

Jump to post
by DocLightning
Sat Sep 18, 2021 7:56 pm
Forum: Non-Aviation
Topic: Herd Immunity Losing Out To Vaccine Hesitation and Virus Mutation
Replies: 205
Views: 14262

Re: Herd Immunity Losing Out To Vaccine Hesitation and Virus Mutation

flyingclrs727 wrote:
This is fascinating! Do you have any links to primary sources?


Any AP Biology textbook or higher will have this information.

Jump to post
by DocLightning
Thu Sep 16, 2021 5:51 pm
Forum: Technical/Operations
Topic: Trim on AN-124/225
Replies: 6
Views: 1028

Re: Trim on AN-124/225

No reference, but size and speed range would pretty dictate a trimmable stabilizer. A quick look at photos of the AN-124 tail makes it appear that the tailplane is fixed. However, the elevator is quite large. https://s29755.pcdn.co/wp-content/uploads/2021/04/DB-Schenker-AN-124_2-2048x1152.jpg

Jump to post
by DocLightning
Wed Sep 15, 2021 8:20 pm
Forum: Travel, Polls & Preferences
Topic: Boeing 767 - Who’s have you flown?
Replies: 80
Views: 3581

Re: Boeing 767 - Who’s have you flown?

-UA
-AA
-I'm not sure if DL
-QF
-SAS, the only time I ever crossed the Atlantic in one.

I really do enjoy the 767, but it seems like they've always been an uncommon ride. I would like to find my way aboard a 764 at some point before they go away.

Jump to post
by DocLightning
Wed Sep 15, 2021 3:16 pm
Forum: Non-Aviation
Topic: VP Harris to California to campaign for Gavin Newsom
Replies: 164
Views: 7094

Re: VP Harris to California to campaign for Gavin Newsom

In 2018 Newsome won with 61.95% of the overall vote. over the GOP Candidate with 38.05% of the vote. The current recall vote with ~68% counted shows Newsome up 63. to 36.1%. https://www.nytimes.com/interactive/2021/09/14/us/elections/results-california-recall.html If those numbers hold or go wider,...

Jump to post
by DocLightning
Sat Sep 11, 2021 7:14 pm
Forum: Travel, Polls & Preferences
Topic: Unwarranted disappointments
Replies: 13
Views: 1196

Re: Unwarranted disappointments

Does anyone else have similar thoughts about what was initially a disappointment in a flying experience turned out similarly to be a good experience or like me a lucky break? In 1998 (I think) I had arranged to fly on my first 777 from SFO to ORD. But when I got to the gate, the equipment had been ...

Jump to post
by DocLightning
Wed Sep 08, 2021 4:15 am
Forum: Civil Aviation
Topic: FAA Confirms Boeing Halts 787 Deliveries
Replies: 235
Views: 58175

Re: FAA Confirms Boeing Halts 787 Deliveries

They did a decent enough job with General Motors, I hear. That was 12 years ago. What's the alternative? Fire every person in the company on the org chart from the middle levels to the top? You think Boeing is dysfunctional and ineffective now, you ain't seen nothing compared to that. Exactly. Rock...

Jump to post
by DocLightning
Mon Sep 06, 2021 3:36 pm
Forum: Civil Aviation
Topic: FAA Confirms Boeing Halts 787 Deliveries
Replies: 235
Views: 58175

Re: FAA Confirms Boeing Halts 787 Deliveries

What I don't get is how Boeing is still racking up new orders. If I were an airline CEO and I were looking at new airplanes, I'd be extremely hesitant to order anything from Boeing. They don't seem to be able to develop new models and, amazingly, they seem to have lost the ability to deliver the mod...

Jump to post
by DocLightning
Sat Sep 04, 2021 2:22 pm
Forum: Travel, Polls & Preferences
Topic: Question about Iran Air and iraqi Airways?
Replies: 14
Views: 2219

Re: Question about Iran Air and iraqi Airways?

In Iran's case, Los Angeles would be about the top of the list for O&D. But they would probably want to hit up anything big for the India disapora... So DC, IAH, DFW, SFO etc... That makes sense, but LAX..range wise these days planes are flying longer and longer ah? Just a few years ago, the Qa...

Jump to post
by DocLightning
Fri Sep 03, 2021 7:53 pm
Forum: Travel, Polls & Preferences
Topic: Best jetliner for hot and high airports?
Replies: 18
Views: 1938

Re: Best jetliner for hot and high airports?

My vote is and always will be with the 757-200. When equipped with the right engines, this plane is an over-powered sled rocket that almost never flew out of PHX in summer weight restricted. The A321NEO actually has a slightly higher Thrust/MTOW ratio than the 757. It also has 1.2x the wing loading...

Jump to post
by DocLightning
Thu Sep 02, 2021 5:53 pm
Forum: Travel, Polls & Preferences
Topic: Was the McDonnell Douglas MD-90 a good airplane?
Replies: 26
Views: 2813

Re: Was the McDonnell Douglas MD-90 a good airplane?

It was a tired old platform, basically the ultimate warmed up DC9 with lots of compromises and shortcomings compared to more modern aircraft Developing it further was pointless 737MAX: hold my beer I think a bit of historical context is appropriate here. Both the DC-9 and the 737 were designed in t...

Jump to post
by DocLightning
Wed Aug 25, 2021 3:54 am
Forum: Travel, Polls & Preferences
Topic: Will commercial flying ever become obsolete?
Replies: 43
Views: 4242

Re: Will commercial flying ever become obsolete?

I'd like to point out that while the great ocean liners of yesteryear have faded into obsolescence, passenger ships and boats still carry countless passengers every day, to say nothing of cruise ships. I don't forsee a future in which passenger flight is wholly eliminated. But perhaps some of the ma...

Jump to post
by DocLightning
Mon Aug 23, 2021 7:42 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

Pfizer is now officiall FDA approved. I felt a great disturbance in the Force, as if millions of anti-vaxxer goalposts just moved in unison. Comirnaty? That is an interesting name..... Bit of a mouthful, huh? Apparently, "Com"=community, "mirna"=mRNA, "ty"=immuniTY. I ...

Jump to post
by DocLightning
Mon Aug 23, 2021 7:33 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

Pfizer is now officiall FDA approved. I felt a great disturbance in the Force, as if millions of anti-vaxxer goalposts just moved at once. Comirnaty? That is an interesting name..... Bit of a mouthful, huh? Apparently, "Com"=community, "mirna"=mRNA, "ty"=immuniTY. I li...

Jump to post
by DocLightning
Thu Aug 19, 2021 4:36 pm
Forum: Non-Aviation
Topic: Major Demographic Changes Confirmed By US 2020 Census
Replies: 103
Views: 6002

Re: Major Demographic Changes Confirmed By 2020 Census

That just proves the point though honestly. Do you think other generations didn't have to sacrifice material wealth or careers (read women foregoing careers entirely to stay home) when they had large families? Households of the 50s/60s/70s were all quantifiably much less well off than households to...

Jump to post
by DocLightning
Mon Aug 16, 2021 8:42 pm
Forum: Non-Aviation
Topic: Taliban rapidly taking over Afghanistan.
Replies: 692
Views: 42975

Re: Taliban rapidly taking over Afghanistan.

Russians held out in Leningrad. German troops held Dunkirk until the end of the war German Volkstrum and remnants of broken divisions made the Red Army pay for every inch of Germany French Legionnaires held out for weeks in Dien Bien Phu Japanese troops made the US pay dearly for Iwo and Okinawa An...

Jump to post
by DocLightning
Mon Aug 16, 2021 8:09 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

You might find it harsh, but only 1,900 children hospitalized in the US with a total population of over 330 million doesn’t sound too bad to me. It is but it also means that children's hospitals don't have capacity to deal with the usual things they need to deal with like flu, RSV, asthma attacks, ...

Jump to post
by DocLightning
Sun Aug 15, 2021 3:42 pm
Forum: Travel, Polls & Preferences
Topic: What is the greatest airport in the world?
Replies: 46
Views: 3473

Re: What is the greatest airport in the world?

Also do love DTW for easy to use layout and a great experience as well as large number of connections. Once you are actually in the building, DTW's Midfield Terminal (I refuse to eponymize it) is IMHO the single best terminal in the entire US. It provides excellent options for moving quickly within...

Jump to post
by DocLightning
Thu Aug 12, 2021 3:42 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

UK is doing things right, the hospitalizations have stopped going up at a manageable level. For some reason the US data hasn't been updated in a few days (that's ok, doctors have more important work to do). https://ourworldindata.org/grapher/current-covid-patients-hospital?country=GBR~USA~ISR~FRA~I...

Jump to post
by DocLightning
Wed Aug 11, 2021 8:07 pm
Forum: Technical/Operations
Topic: Continuous explosion in jet engine during operation?
Replies: 21
Views: 2346

Re: Continuous explosion in jet engine during operation?

GalaxyFlyer wrote:
No, it is not correct as there are no explosions. It’s burning fuel, not detonating it.


Would you kindly expound on the definition of "burning" vs. "detonating"? Now I'm curious.

Jump to post
by DocLightning
Mon Aug 09, 2021 8:29 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

Lambda is putting children in the hospital https://blackdoctor.org/covid-delta-new-lambda-variant-surge-across-the-u-s/ I have seen no evidence (including in your article) that Lambda impacts children more than other variants. From most of my colleagues who work inpatient pediatrics, the vast major...

Jump to post
by DocLightning
Mon Aug 09, 2021 7:42 pm
Forum: Non-Aviation
Topic: 9/11 Families: Biden Should Not Attend Commemoration Without Releasing Documents
Replies: 27
Views: 2415

Re: 9/11 Families: Biden Should Not Attend Commemoration Without Releasing Documents

seb146 wrote:

1. We know Saudi Arabia was behind 9/11
2. Our troops were in Afghanistan


Recall that Al Qaeda was operating out of Afghanistan, which is why we wound up there in the first place. However, their project required a lot of money, which came from KSA.

Jump to post
by DocLightning
Thu Aug 05, 2021 1:27 am
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

Anyone dare to guess how long we will be in this pandemic and how long the media and politicians will hyperventilate about cases? Another year? Three years? Until 2030? I wish I knew. I think that we are going to have to wait for everyone in the world to have had it. At present, for most vaccinated...

Jump to post
by DocLightning
Sun Aug 01, 2021 9:36 pm
Forum: Non-Aviation
Topic: Monkeypox Cases in the United States
Replies: 3
Views: 822

Re: Monkeypox Cases in the United States

1) Two currently available vaccines (DryVax and Jynneos) offer protection against monkeypox. 2) Multiple modeling studies have predicted that monkeypox cannot establish sustained transmission in humans. Multiple spillover events have occurred, but no sustained transmission has occurred. 3) This is a...

Jump to post
by DocLightning
Sun Aug 01, 2021 9:21 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

CRJ200flyer wrote:
I understand the pharmacy won’t know, but won’t their insurance figure it out when it’s submitted again?


I got mine through work. I'm pretty sure my insurance never had anything to do with it.

Jump to post
by DocLightning
Sun Aug 01, 2021 7:09 pm
Forum: Non-Aviation
Topic: COVID-19 Vaccine News and Discussion Thread
Replies: 3012
Views: 207893

Re: COVID-19 Vaccine News and Discussion Thread

Bad News: https://www.cdc.gov/mmwr/volumes/70/wr/mm7031e2.htm?s_cid=mm7031e2_w In July 2021, following multiple large public events in a Barnstable County, Massachusetts, town, 469 COVID-19 cases were identified among Massachusetts residents who had traveled to the town during July 3–17; 346 (74%) ...

Jump to post