Search found 172 matches

by MatthewDB
Fri Sep 18, 2020 5:09 am
Forum: Civil Aviation
Topic: Impact on airlines from growing corporate sustainability
Replies: 17
Views: 1783

Re: Impact on airlines from growing corporate sustainability

I hope the discussion of seating class results in something more in between present coach and business class. The airlines have been chasing the dollars of the premium seats by making them ever more spacious and expensive. My employer abandoned the business class seats a decade ago, but will do the ...

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by MatthewDB
Tue Apr 21, 2020 6:35 am
Forum: Technical/Operations
Topic: What made the 737 more "upgradable" than the 727?
Replies: 37
Views: 4577

Re: What made the 737 more "upgradable" than the 727?

As much as I dislike modern jetliners all looking the same, there is a reason why they all look the same. Many layouts have been tried, and the 737-3+/A320/etc. style layout has consistently emerged as the best balance of efficiency and practicality for most airline applications. Just to add to you...

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by MatthewDB
Wed Jan 15, 2020 8:50 pm
Forum: Civil Aviation
Topic: A DL 772, Flying LAX-PVG, Makes Emergency Landing And Dumps Fuel On School
Replies: 565
Views: 57202

Re: A DL 772, Flying LAX-PVG, Makes Emergency Landing And Dumps Fuel On School

Just for reference, ATC only requires 2000 ft above the highest obstacle for fuel dumping. https://www.faa.gov/air_traffic/publications/atpubs/atc_html/chap9_section_4.html Negative... I as a pilot can dump fuel anytime anywhere. It you need to do a “controlled dump”. 2000 ft is what the minimum al...

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by MatthewDB
Thu Jan 09, 2020 10:20 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

ISNA pictures. They are quite telling. Not sure this batch was already posted on the thread or not. https://www.isna.ir/amp/98101813851/?__twitter_impression=true&fbclid=IwAR2cHxfMQm7EFOQ7gUPDqsFN3eWrcj899AMEqG2gEbRP96blcGNgLQLwfes in the first photo you can see a human organ. Very sad and pres...

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Perhaps the other 68-78 are non-Canadian nationals traveling to Canada?
-->

sonicruiser wrote:
ShamrockBoi330 wrote:
138 of the passengers were travelling on to Canada, confirmed by Trudeau

http://news.sky.com/story/iran-plane-cr ... a-11904127


How did it go from 60-70 to 138?


Perhaps the other 68-78 are non-Canadian nationals traveling to Canada?

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by MatthewDB
Wed Jan 08, 2020 9:22 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

The "position of the first impact" perfectly fit some last images of the crash: https://www.telegraph.co.uk/content/dam/news/2020/01/08/TELEMMGLPICT000220713957_trans_NvBQzQNjv4BqZgEkZX3M936N5BQK4Va8RWtT0gK_6EfZT336f62EI5U.jpeg?imwidth=1240 source: https://www.telegraph.co.uk/news/2020/01...

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by MatthewDB
Wed Jan 08, 2020 9:08 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

What sort of mechanical failure could cause a midair explosion like that? The only thing I can think of is an uncontained engine failure piercing and igniting the fuel tanks. Is there any other known issue that could have caused this? A puncture of the fuel tanks isn't going to result in an explosi...

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by MatthewDB
Wed Jan 08, 2020 9:01 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

If Iran has nothing to hide, why not send the CVR and FDR to a neutral party? Who would that be? It would have to be someone who is trusted by Iran, Ukraine, Canada, USA and France. That's a pretty tall task! Given the hostilities between Ukraine and Russia, that certainly isn't Russia. Does Switze...

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by MatthewDB
Wed Jan 08, 2020 6:41 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

In Moscow? Forgetting for a minute the Russians, the Chinese, and every NATO country who'd notice such a launch immediately due to satellite monitoring ... I'm not sure you'd be able to launch a missile without anyone in the US noticing ... it's a rocket when it's going up ... big, loud, leaves a v...

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by MatthewDB
Wed Jan 08, 2020 6:30 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

Exactly, a trigger itchy military on high alert shooting down a civilian aircraft is not unprecedented. Russia\Soviets done it at least twice It's 3 KAL902 - although most survived, KAL007, MH17 US done it once that I know about Looks like Iran may have did it last night. The French are probably re...

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by MatthewDB
Wed Jan 08, 2020 6:26 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

With Trump talking about so many other possible targets for US attacks on Iran I'm surprised at how few people here mention a possible US missile being responsible. Everything is on the table at this time. If someone hit the plane mistakenly for me it Is more likely to be USA rather than Iran. Iran...

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by MatthewDB
Wed Jan 08, 2020 6:22 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

Some missiles are as large as the aircraft itself. Also how long would it take for a Minuteman 3 from say North Dakota to reach IKA? Would the 45 minute window from the Iranian launches to this hit account for that? This one wins the award for the most over the top, by far. A flight from North Dako...

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by MatthewDB
Wed Jan 08, 2020 6:11 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

Time zones man. It doesn’t get light where I live until like 0900 That probably had less to do with your time zone and more to do with your latitude. Actually, being on the west side of a time zone has a significant effect on sunrise and sunset times relative to being on the east side of the time z...

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by MatthewDB
Wed Jan 08, 2020 6:02 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

What would be the possibility that this was a USA/Western missile targeting a close by Iranian military site that instead accidentally hit an airliner, rather than the other way around? Are there any possible target sites in the vicinity of where the aircraft was hit, assuming/speculating a possibl...

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by MatthewDB
Wed Jan 08, 2020 5:58 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

Let me preface this by saying I believe the most likely scenario is an accidental shoot down by Iran. But for everyone saying “X, Y, or Z doesn’t bring down a modern aircraft,” let me remind you that stirring the fuel tanks didn’t bring down a single 747, until one day it did. No A300 had its tail ...

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by MatthewDB
Wed Jan 08, 2020 5:53 pm
Forum: Civil Aviation
Topic: Iran admits to accidentally shooting down Ukraine Flight 752
Replies: 2728
Views: 298439

Re: Reports of Ukrainian 737 Crash in Tehran,Iran

If Iran has nothing to hide, why not send the CVR and FDR to a neutral party? Who would that be? It would have to be someone who is trusted by Iran, Ukraine, Canada, USA and France. That's a pretty tall task! Given the hostilities between Ukraine and Russia, that certainly isn't Russia. Does Switze...

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by MatthewDB
Tue Jul 09, 2019 11:57 pm
Forum: Civil Aviation
Topic: Updated: New Delta international main cabin service launched
Replies: 187
Views: 10375

Re: Delta improves intl Main Cabin experience

An improvement would be less cramped seating on delta. Delta is one of the last remaining carriers offering 9 abreast on the 777, while the rest of the world has gone 10-abreast. They also have plenty of 7-abreast 767's and 8-abreast airbus so I think your complaint has no substance whatsoever. The...

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by MatthewDB
Wed Jul 03, 2019 6:05 pm
Forum: Civil Aviation
Topic: Updated: New Delta international main cabin service launched
Replies: 187
Views: 10375

Re: Delta improves intl Main Cabin experience

Since a lot of corporate international flyers have to fly Y, does DL’s ability to demonstrate a more desirable Y experience (real or perceived) have any impact on its ability to sign more corporate contracts? Wouldn't know, but why would corporate contracts worry about minor (in the grand scheme of...

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by MatthewDB
Wed Jul 03, 2019 5:51 pm
Forum: Civil Aviation
Topic: Updated: New Delta international main cabin service launched
Replies: 187
Views: 10375

Re: Delta improves intl Main Cabin experience

An improvement would be less cramped seating on delta. Space on an aircraft costs serious money. People who want to pay for it have First/Business and Comfort+ and/or Premium Select on over 90% of DL/DL Connection aircraft. Modest improvements in long-haul coach meal service (greatly overdue, IMHO)...

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by MatthewDB
Tue Jun 25, 2019 6:47 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 296996

Re: SpaceX - Tests, Launches, Developments

Core booster seems to have missed the boat... went for a drink. Everything else looks OK. I loved the crowd reaction. Dang... wait, we didn't have high hopes on this one so whooo hooo. I'm hoping that we're going to get some good videos of the night double landing. This should be a good comparison ...

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by MatthewDB
Wed May 29, 2019 7:26 am
Forum: Military Aviation & Space Flight
Topic: Russia plays near Alaska
Replies: 28
Views: 3806

Re: Russia plays near Alaska

Planeflyer wrote:
Ok sounds reasonable assuming the bombers are flying w/o weapons. Anyone no for sure on this?


I'm betting they are flying with a full weapon load. Otherwise what's the point? During the cold war they certainly were.

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by MatthewDB
Fri Apr 19, 2019 6:44 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 296996

Re: SpaceX - Tests, Launches, Developments

I wonder if they can recover the engines?

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by MatthewDB
Mon Apr 08, 2019 7:17 am
Forum: Technical/Operations
Topic: Power of control surface feel feedback
Replies: 9
Views: 1689

Power of control surface feel feedback

This is a question I've long wondered about, but the talk about the events around the to 737 MAX crashes has brought it back up. From what I understand, with mechanical (cable) / hydraulic controls, the force feedback is entirely from a feel computer applying backforce on the controls. Is that corre...

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by MatthewDB
Thu Dec 20, 2018 8:17 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

UA announced ORD-EUG/RDM today, on E175 equipment. EUG is year-round, RDM is seasonal, and both will be daily and will start on June 6, 2019. https://thepointsguy.com/news/united-ord-iah-regional-flights/ Cool! Back in the early aughts I did quite a few EUG-DEN trips on UA. The CRJ is a bit tight t...

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by MatthewDB
Thu Dec 13, 2018 1:59 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

I hate to see Southwest leave C. I feel this concourse has the best amenities. Appears it would balance out the airfield operations a bit, especially when they are using the 28's. Southwest would likely land and depart 28R mostly once on E. They could favor landing on 10L and pull right into their ...

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by MatthewDB
Fri Nov 23, 2018 11:36 pm
Forum: Travel, Polls & Preferences
Topic: Shooting the breeze with a WN pilot about Hawaii
Replies: 29
Views: 3301

Re: Shooting the breeze with a WN pilot about Hawaii

No way is WN going to destroy HA.... a large chunk of interisland is actually business travel, and I can almost guarantee those folks will stick with HA. Given the 717 vs. the 737 for interisland, it's the 717's advantage any day. The tourist side of it? Harder to say ... but with 10x the frequency...

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by MatthewDB
Fri Nov 23, 2018 11:30 pm
Forum: Civil Aviation
Topic: The Future Of Hawaiian Inter-Island Travel
Replies: 145
Views: 21739

Re: The Future Of Hawaiian Inter-Island Travel

If cooling is an issue, would running the smaller aircraft of a family help? I get that the 737-300 had trouble, but is just assuming all newer aircraft really a problem? The 737-300 was the largest of 737-3/4/5 so the engine was working the hardest of the three. For example, a 737-6/7/8/9 all use t...

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by MatthewDB
Fri Nov 23, 2018 11:21 pm
Forum: Civil Aviation
Topic: The Future Of Hawaiian Inter-Island Travel
Replies: 145
Views: 21739

Re: The Future Of Hawai'ian Inter-Island Travel

It’s going from 20 planes to 30-32 tails—hardly going to crowd the ramps. 20 717s Times 128 seats equal 2560 seats; divide 2560 by 78 seats equals 32 turboprops. Block-to-block times will only increase a small increment, but perhaps a few more tails. This isn’t insurmountable IF technology doesn’t ...

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by MatthewDB
Fri Nov 23, 2018 11:18 pm
Forum: Civil Aviation
Topic: The Future Of Hawaiian Inter-Island Travel
Replies: 145
Views: 21739

Re: The Future Of Hawai'ian Inter-Island Travel

If insufficient engine cool down time is the problem, develop a contraption that blows cold air into the engine during stops. Cheaper than developing a new engine. I would think just motoring the engines on the starter would do that. They could use ground air to give both cooling and motor air (I d...

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by MatthewDB
Tue Nov 13, 2018 9:51 am
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 7715

Re: Taxi out on one engine?

Starlionblue wrote:

Both engines at ground idle might well be too much power for taxi, so you have to keep braking.


I didn't think a turboprop made any thrust at disk.

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by MatthewDB
Tue Nov 13, 2018 8:46 am
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 7715

Re: Taxi out on one engine?

. Seems like single taxi out was common in the regional turboprops, too - I distinctly remember a woman who was concerned about the stationary prop one time. I've noted that too. I've only taken flights in Dash8 and Q400 turboprops so I don't know if there is a difference with the ATR. 2nd engine s...

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by MatthewDB
Mon Nov 12, 2018 7:50 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

Since everybody loves a good PDX vs SEA debate, I thought I’d look at some economic indicators to shed some light on why SEA has been growing exponentially more than PDX. The cliff notes version is that Seattle’s economy has grown exponentially more than Portland’s. Currently metro Seattle has the ...

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by MatthewDB
Mon Nov 12, 2018 7:43 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3187
Views: 617659

Re: Lion Air 737MAX8 Crashed Jakarta to Pangal Pinang

... Ironically the Kalman filter was designed a half century ago to flight in space but is still not used to flight aircraft... The Kalman filter is used for position computation. It is used to combine the IRS with the GPS position. IRS position gives you a very accurate short term position. It als...

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by MatthewDB
Tue Nov 06, 2018 4:55 am
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 3187
Views: 617659

Re: Lion Air 737MAX8 Crashed Jakarta to Pangal Pinang

SO many crashes and incidents lately are in some way related to unreliable airspeed, pitot static failures, etc.. MANY (if not all) have significant issues and failures leading to the events, but aviation safety has always been about removing that "link" in the chain which causes the high...

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by MatthewDB
Mon Oct 01, 2018 3:29 pm
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

If I could only arrive in the US via PDX, I'd consider Global Entry not worth it. I don't think it has actually saved me much time at PDX since even the regular line is comparable to the Global Entry time at places like LAX. It's been a mixed bag at YVR; for Canadian domestic flights customs has bee...

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by MatthewDB
Mon Oct 01, 2018 4:24 am
Forum: Technical/Operations
Topic: How efficient can a jet engine get in the future ?
Replies: 19
Views: 3418

Re: How efficient can a jet engine get in the future ?

I disagree on compressors being perfect. There is several percent to gain. In particular optimizing the output of the low compressor into the high compressor. Where is the loss in the compressor transition? Is this just because they can't match optimal performance at different power settings becaus...

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by MatthewDB
Mon Oct 01, 2018 4:11 am
Forum: Civil Aviation
Topic: How come quads outlasted trijets?
Replies: 86
Views: 16211

Re: How come quads outlasted trijets?

Past that, technology has improved such that most trijet airliners have been replaced by large twins with the same performance capability. Quads exist where the additional engine performance is needed (747, A380; the A340 has largely been rendered obsolete by newer twins). Did the A380 have to be a...

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by MatthewDB
Mon Oct 01, 2018 4:04 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

I agree. And not to mention, Seattle's constrained and run down facilities compared to the dream airport that is PDX. SEA punches way above its weight and a lot of that is supported by PDX passengers. While I'm happy PDX has the intl flights it has, I think we can do better. I can't believe we only...

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by MatthewDB
Mon Oct 01, 2018 3:50 am
Forum: Travel, Polls & Preferences
Topic: Premium Economy is it the new old Business Class
Replies: 10
Views: 1909

Re: Premium Economy is it the new old Business Class

I wonder if companies that now allow J flying will force their employees to fly Premium Economy come the next downturn. or Will business class always be allowed? I used to work for Hewlett Packard. They banned business class travel during the dot com bust just after 2000. If you took more than 3 cr...

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by MatthewDB
Mon Sep 24, 2018 6:38 am
Forum: Technical/Operations
Topic: What exactly is the fuel-inerting system on 747's?
Replies: 51
Views: 9040

Re: What exactly is the fuel-inerting system on 747's?

There are hardly "no events" of tanks blowing up. There is this one too: https://en.wikipedia.org/wiki/Philippine_Airlines_Flight_143 Jet fuel is quite a bit more dangerous to handle than gasoline or diesel. Gasoline in a closed tank at most outdoor temperatures won't burn because the gaso...

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by MatthewDB
Sat Sep 08, 2018 4:47 am
Forum: Technical/Operations
Topic: Getting the shortest takeoff run
Replies: 20
Views: 2439

Re: Getting the shortest takeoff run

Years ago I was transiting in Phoenix when a sandstorm whipped up. They announced to board quickly and that all airplanes were promptly departing. I was in a 757-200. We pushed back before everyone was seated, and the pilot announced that we were cleared for #1 departure and we took off at the faste...

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by MatthewDB
Mon Aug 13, 2018 2:39 am
Forum: Civil Aviation
Topic: Updated: QX employee steals and crashes Q400 near SEA
Replies: 705
Views: 104996

Re: Updated: AS employee steals and crashes Q400 at SeaTac

Future airplanes should have two pilots, one in the airplane and the other at a ground control station..Steal the airplane or deviate? and sorry, ground pilot has the airplane. Earthquake wrecks the ground station? Ok, sky pilot has it. What an incredible gift to terrorists! They don't even have to...

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by MatthewDB
Mon Aug 13, 2018 2:30 am
Forum: Civil Aviation
Topic: Updated: QX employee steals and crashes Q400 near SEA
Replies: 705
Views: 104996

Re: Updated: AS employee steals and crashes Q400 at SeaTac

Future airplanes should have two pilots, one in the airplane and the other at a ground control station..Steal the airplane or deviate? and sorry, ground pilot has the airplane. Earthquake wrecks the ground station? Ok, sky pilot has it. What an incredible gift to terrorists! They don't even have to...

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by MatthewDB
Mon Aug 13, 2018 2:28 am
Forum: Civil Aviation
Topic: Updated: QX employee steals and crashes Q400 near SEA
Replies: 705
Views: 104996

Re: Updated: AS employee steals and crashes Q400 at SeaTac

https://web.archive.org/web/20120511191 ... -links.cfm
-->

twinotter wrote:
Any "code"would end up being the same as 99% of secure doors at every airport: 1234.


Bruce G. Blair claims that the first US nuclear bombs with security codes were all set to 00000000. https://web.archive.org/web/20120511191 ... -links.cfm

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by MatthewDB
Mon Aug 13, 2018 2:21 am
Forum: Civil Aviation
Topic: Updated: QX employee steals and crashes Q400 near SEA
Replies: 705
Views: 104996

Re: AS Employee steals Q400 at SeaTac

Would one person be able to take off and fly an A380 ? Sure...why not? If a plane is not parked nose first at a gate, anybcommercial plane is stealable. Pull the chocks, start the engines and go. Much less likely - you can’t enter a larger plane, much less an A380, without stairs. A Q400 does not n...

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by MatthewDB
Thu Aug 02, 2018 5:51 pm
Forum: Travel, Polls & Preferences
Topic: TSA considering cutting security screenings at small airports
Replies: 43
Views: 3652

Re: TSA considering cutting security screenings at small airports

Getting rid or shrinking TSA is a great idea, however, it would need to be replaced with private screeners. So, going back to pre-9/11, then? People need to be careful what they wish for. I'm sure this isn't universal, but a lot of people on this site probably don't remember what "security&quo...

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by MatthewDB
Sun Jul 08, 2018 2:21 am
Forum: Travel, Polls & Preferences
Topic: Why so many long haul flight to India arrive at midnight?
Replies: 13
Views: 2574

Re: Why so many long haul flight to India arrive at midnight?

I have heard the explanation that night shift employees are paid more. It makes sense to have the low cost employees in India work at night and the higher cost European employees to work day shift. I have no idea if it is true or not, just an explanation I've heard. As for travel: If you're flying f...

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by MatthewDB
Sun Jun 24, 2018 4:19 am
Forum: Technical/Operations
Topic: Pilot's last flight
Replies: 48
Views: 6535

Re: Pilot's last flight

Starlionblue wrote:
CosmicCruiser wrote:
AR385 wrote:
I thought they can continue flying cargo aircraft.


Not if its under FAR 121. I had to go at 65


Many people I meet seem to have the impression that cargo aircraft operate under a less stringent set of rules than passenger aircraft. It's weird.


They're clearly unfamiliar with El Al Flight 1862.

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by MatthewDB
Sun Jun 24, 2018 4:08 am
Forum: Civil Aviation
Topic: Oregon Aviation Thread - 2018
Replies: 1408
Views: 140970

Re: Oregon Aviation Thread - 2018

Commercial flights could come back to Salem (SLE) by late 2019: https://www.kgw.com/article/news/local/marion-county/commercial-flights-proposed-for-salem-airport/283-563877353?utm_campaign=trueAnthem:+Trending+Content&utm_content=5b20ae3404d301774c5ab6ff&utm_medium=trueAnthem&utm_sourc...

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by MatthewDB
Sun Jun 24, 2018 3:47 am
Forum: Technical/Operations
Topic: Windmilling with a tail wind & lubrication
Replies: 8
Views: 1595

Re: Windmilling with a tail wind & lubrication

I usually see 1.5-2.0 n1 when it is windmilling in a stiff wind which amounts to about a hundred rpm. That's about what I'd guess they were spinning at. More than one rotation per second. Not fast enough to cause issues. I usually see 1.5-2.0 n1 when it is windmilling in a stiff wind which amounts ...

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