Search found 1103 matches

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by kalvado
Wed Jan 16, 2019 10:18 pm
Forum: Civil Aviation
Topic: Airlander 10 gets full-production go-ahead
Replies: 23
Views: 3259

Re: Airlander 10 gets full-production go-ahead

Given current helium shortage - which may or may not be resolved - planning on obtaining enough gas for mass production is very brave.

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by kalvado
Thu Jan 10, 2019 3:30 pm
Forum: Civil Aviation
Topic: Alaska Airlines flight diversion leads to 30-hr nightmare for passengers
Replies: 94
Views: 14182

Re: Alaska Airlines flight diversion leads to 30-hr nightmare for passengers

There is no defending this, at all. Shame on Alaska, I hope every single passenger on that flight votes with their wallet/voice and never fly Alaska again along with telling their friends/family not to as well. Everyone can have a bad day. I don't fly a lot, but I had significant issues with DL, UA...

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by kalvado
Wed Jan 09, 2019 9:34 pm
Forum: Civil Aviation
Topic: Alaska Airlines flight diversion leads to 30-hr nightmare for passengers
Replies: 94
Views: 14182

Re: Alaska Airlines flight diversion leads to 30-hr nightmare for passengers

Airlines have diversion agreements/processes with other airlines for situations like this. Surprised AS didn't contact its partner AA or even DL/UA for assistance with ground handling and getting these customer in a hotel in Buffalo. I don’t know Buffalo but maybe by the time they figured out the p...

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by kalvado
Sat Jan 05, 2019 5:08 am
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 2990

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

Starlionblue wrote:

Side note: The IATA code for Singapore Airlines is SQ, not SN.


I was talking about recent Brussels airlines event, SN358 = so I got SN part right...

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by kalvado
Sat Jan 05, 2019 4:12 am
Forum: Civil Aviation
Topic: TSA screeners calling in sick
Replies: 55
Views: 8370

Re: TSA screeners calling in sick

The TSA and Coast Guard not getting paid is ridiculous IMHO. I would consider calling in sick if I were in their position as well. As long as the TSA is collecting the $5.60 each way passenger fee the screeners should be getting paid. Period. I hope their union wins the lawsuit they filed, forcing ...

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by kalvado
Sat Jan 05, 2019 4:05 am
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 2990

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

Maintenance procedures are slightly different. As for the fuel, well that is one of the risk factors. However given the extremely low incidence of fuel contamination events that seriously affected an aircraft, it's not something that keeps me up at night. Well, as a self loading cargo I surely pref...

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by kalvado
Sat Jan 05, 2019 1:03 am
Forum: Civil Aviation
Topic: TSA screeners calling in sick
Replies: 55
Views: 8370

Re: TSA screeners calling in sick

Work in public sector has its advantages and disadvantages. Pension and other benefits, job security. There are also some downsides, like this situation. Whenever I hear about such delays, I wonder if any TSA folks would trade their uniforms for employment at will positions. On the other side of the...

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by kalvado
Sat Jan 05, 2019 12:22 am
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 2990

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

Both Boeing and Airbus carefully track causes that would impact an ETOPS operation. I doubt that fuel contamination is anywhere high up on that list. Fuel icing maybe, but simple contamination here in the US, SA/LA, Europe and Asia is a pretty rare event. Can you expand on your comments? BA38, SN35...

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by kalvado
Fri Jan 04, 2019 3:46 pm
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 2990

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

I just found out LATAM/QANTAS and Air New Zealand fly between South America and Australia/New Zealand crossing the South Pacific ocean. I read the Wikipedia article on Transpolar flights and apparently due to lack of diversion airports ETOPS aircraft (77E for AirNZ, 789 for LATAM, Qantas still uses...

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by kalvado
Fri Jan 04, 2019 3:11 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 2691
Views: 495992

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Blame goes to the party having at least something to do with the problem as maintenance did their part. It wouldn't be that long ago a random party - e.g. single ethnicity - would be blamed by many people. So modern society actually went a long way.... "Despite anything that occurred" mea...

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by kalvado
Fri Jan 04, 2019 2:13 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 2691
Views: 495992

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

despite anything that occured, I still blame Lion Air for faulty crew resource management and safety training and safety maintenance. What's wrong with current society in a nutshell. Actually proud of being bloody minded and judgemental, while confessing ignorance of any facts. Great... I know what...

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by kalvado
Thu Jan 03, 2019 6:24 pm
Forum: Civil Aviation
Topic: Korean Air A220 Significant Engine Damage
Replies: 26
Views: 13336

Re: Korean Air A220 Significant Engine Damage

A traditional question... Is it a write-off? More elaborate version of the same question: apparently rotor and stator blades from the last stage as seen in picture are scrap metal. Probably at least some of stages before that also damaged. What would that do to the engine in general? Shafts, bearing...

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by kalvado
Mon Dec 31, 2018 3:14 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

This might just be the "two engine failures from unrelated causes" the statisticians have been saying is not possible. No statistician will ever claim "two engine failures from unrelated causes is not possible". A statistician may give you a (extremely) remote chance, but will a...

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by kalvado
Fri Dec 28, 2018 3:30 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

My question is did the crew make any plans for diversion during the 40 minutes between flame out and relight? https://aviation-safety.net/wikibase/wiki.php?id=220016 says: During the flight, at 01:50 hours (00:50 UTC, December 11) when the airplane was cruising at FL400 over Algeria, engine no. 1 (...

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by kalvado
Fri Dec 28, 2018 3:07 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

My question is did the crew make any plans for diversion during the 40 minutes between flame out and relight? My initial reading was that it relit immediately but this is not the case. I know it is ETOPS rated but surely in a single engine operative situation you plan to land at the nearest suitabl...

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by kalvado
Thu Dec 27, 2018 1:39 pm
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

Did I read that last bit correctly? Just exactly who do you think you are? The last idiot who spoke to me in such a condescending way …. nah, you're not worth it. I am the one who is trying to keep this discussion technical and educative. You may shut me up on a forum - it is easy. But take my word...

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by kalvado
Thu Dec 27, 2018 1:34 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

The Boeing ENG FAIL checklist says to land at the nearest suitable airport. I don’t recall if the Engine Relight checklist says to land. I’ll look it up when I get back in the office. The 737, 757, 767 Engine Fail checklists say PTLANSA (Plan To Land At Nearest Suitable Airport). The 737, 757, 767 ...

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by kalvado
Thu Dec 27, 2018 1:18 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

I wonder if generic drift down profile is available - how long would it take to get down to FL270 for relight attempt? In November 2009, the Airbus A330 became the first aircraft to receive ETOPS-240 approval, which has since been offered by Airbus as an option Is that an option for new builds from...

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by kalvado
Thu Dec 27, 2018 12:48 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

. If I understand this graph correctly, they were flying for 2 hours on a single engine while pushing for the destination. Seems like a bit of a stretch... Actually, no. The black line over the Sahara indicates loss of data, because FR24 has no stations gathering data in the Sahara. We don't have t...

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by kalvado
Thu Dec 27, 2018 12:24 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

Revelation wrote:
Image
.

If I understand this graph correctly, they were flying for 2 hours on a single engine while pushing for the destination. Seems like a bit of a stretch...

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by kalvado
Thu Dec 27, 2018 12:15 pm
Forum: Civil Aviation
Topic: Gatwick drone closures
Replies: 547
Views: 67982

Re: Gatwick drone closures

This whole story is nonsense, there was no drone, it was likely a series of UFO sightings that cant be explained, the drone is just a cover for what what they dont want to admit. Most drones can only be in the air for 30 or so mins, there is no way multiple drones were seen over the airport and no ...

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by kalvado
Thu Dec 27, 2018 11:41 am
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

I have to say that I'm losing patience with you; it would appear you are trolling.! A lot of duckspeak, no solid numbers in terms of $$/flight or lb fuel/flight. Relax, take a deep breath, and try to prove your idea actually worth bytes wasted. I disagree about the duckspeak, but I'll take your adv...

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by kalvado
Thu Dec 27, 2018 11:32 am
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

Except that the i3 is an electric car with an optional range extender. As already discussed, any amount of aircraft can't take off with a battery pack as main source of energy. The above hybrid with the gas turbine as main energy supply is a challenge as it is to justify. The ATR72 has 3600kW of to...

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by kalvado
Wed Dec 26, 2018 9:04 pm
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

http://www.spokesman.com/stories/2018/dec/22/linwood-laughy-time-for-bpa-to-act-on-dams/?utm_source=Sightline%20Institute&utm_medium=web-email&utm_campaign=Sightline%20News%20Selections This article is also about salmon and orcas, but also a potential dire financial situation for the Bonnev...

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by kalvado
Wed Dec 26, 2018 8:53 pm
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

SheikhDjibouti wrote:
I have to say that I'm losing patience with you; it would appear you are trolling.!

A lot of duckspeak, no solid numbers in terms of $$/flight or lb fuel/flight.
Relax, take a deep breath, and try to prove your idea actually worth bytes wasted.

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by kalvado
Wed Dec 26, 2018 4:40 pm
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

Meanwhile, you can either run the gas turbines at high efficiency (80%, 2192 hp, 1100 lb fuel per hour per PW127), or you can throttle back to "save fuel" and yet still burn a whopping 681 lb/hr (30% typical approach throttle setting). So this is about 267 lb/hour over 10 minutes of desce...

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by kalvado
Wed Dec 26, 2018 2:49 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

And simple fact here is that they had at least one more shutdown (actually more than that, multiple restarts are quoted by AvHerald) within next few hours of flight As I have said on more than one occasion; it pays to read the exact wording in news articles. And even then query if they might be lyi...

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by kalvado
Wed Dec 26, 2018 2:10 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

If we want to go numeric... What are the chances they would end up with both engines off in cruise? The backside of envelope estimate - coupled with postmortem data of multiple restarts in descent - shows something on the order of 1%. Do you actually mean the chances of a single engine failure lead...

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by kalvado
Wed Dec 26, 2018 2:01 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

Thing is, that pilot had to know after the first event any future decision s/he made would now be subject to question. From what I read here most pilots would be worried about losing their license and thus their career should a second event come along and make the first decision to continue onward ...

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by kalvado
Wed Dec 26, 2018 1:43 pm
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

First of all, you need to pay for collection of that energy. And that price will quickly become too high. Totally vague, and doesn't include any numbers, which I would have been ok with, until you went on to say... ...you need to show numbers first. How much efficiency you are loosing { :?: } at lo...

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by kalvado
Wed Dec 26, 2018 12:19 pm
Forum: Civil Aviation
Topic: Brussels Airlines A330 Suffers Dual Engine Failure
Replies: 211
Views: 36896

Re: Brussels Airlines A330 Suffers Dual Engine Failure

If we want to go numeric... What are the chances they would end up with both engines off in cruise? The backside of envelope estimate - coupled with postmortem data of multiple restarts in descent - shows something on the order of 1%. Cost of human life is about $2M, frame cost is on the order of $0...

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by kalvado
Wed Dec 26, 2018 11:21 am
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

If you're talking about saving power on descenr to bring it to the ground, your design concept is crap. Energy is way cheaper on the ground, carrying it around and bringing back is a waste. Thank you for that reply. Unfortunately the phrase "your design concept is crap." was immediately f...

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by kalvado
Wed Dec 26, 2018 1:51 am
Forum: Civil Aviation
Topic: Electric planes: the state of the art
Replies: 259
Views: 16417

Re: Electric planes: the state of the art

e.g. Avro RJ100 / ATR72 / Q400 4-engine regional hybrid Two small gas turbine, running on bio-fuel. Plus ….Two similar capacity electric motors, and small short range battery packs, to provide short periods of extra power for take-off & climb, Sorry, something about this doesn’t sound right. Yo...

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by kalvado
Wed Dec 26, 2018 1:41 am
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2081

Re: Derating engines and SFC

But who would put a 100,000 pound thrust engine on a plane requiring 60,000 pounds and derate it? Derates are to give variable thrust engines one on type to save engine wear. GF How much is a physical difference between different models of V2500, for example? Say 2522-A5 for A319 and V2533-A5 for A...

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by kalvado
Mon Dec 24, 2018 11:54 pm
Forum: Civil Aviation
Topic: Southwest loses part of stabilizer LAX-Reno 21 Dec
Replies: 35
Views: 12071

Re: Southwest loses part of stabilizer LAX-Reno 21 Dec

I've seen the actual photo of this incident (and am not at liberty to post it). It looks very much like the one already posted - minus any hint of blood or feathers. To say it "lost part of the stab" is wildly inaccurate. There's a gash in the leading edge, that looks to have been caused ...

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by kalvado
Mon Dec 24, 2018 2:29 pm
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2081

Re: Derating engines and SFC

Just found some info - it is apparently in a university lecture, but actual PW data seems to be used: https://nptel.ac.in/courses/101106041/chapter%204%20Lecture%2016%2020-12-2011.pdf Your question is answered in fig 4.13 a-d on pages 5-7. Looks like SFC goes up with the decrease of thrust at the sa...

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by kalvado
Mon Dec 24, 2018 1:29 pm
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2081

Re: Derating engines and SFC

However, Derated thrust increases fuel burn during takeoff/climb, so one can argue that the TSFC during these phases is somewhat reduced. This I don't understand. For a physically identical engine, it doesn't matter, if it is derated or not, pushing up any given tonnage up to cruise level. Work don...

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by kalvado
Sun Dec 23, 2018 5:46 pm
Forum: Civil Aviation
Topic: Krakatoa Volcano Erupts - Trouble For Air Travel?
Replies: 7
Views: 2760

Re: Krakatoa Volcano Erupts - Trouble For Air Travel?

https://www.volcanodiscovery.com/krakat ... TO-SW.html
-->

There is some, the question is how big is it going to grow.
Ash advisory is already issued: https://www.volcanodiscovery.com/krakat ... TO-SW.html

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by kalvado
Sat Dec 22, 2018 1:43 am
Forum: Civil Aviation
Topic: Gatwick drone closures
Replies: 547
Views: 67982

Re: Gatwick drone closures

johns624 wrote:
The French would have stopped this folly a long time ago.

By going on strike and canceling all the flights for a different reason?

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by kalvado
Thu Dec 20, 2018 6:49 pm
Forum: Civil Aviation
Topic: The solution to drone safety issues
Replies: 64
Views: 5855

Re: The solution to drone safety issues

So, no cell service, bluetooth or wifi within 5 miles from the airport?...

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by kalvado
Thu Dec 20, 2018 5:19 pm
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

Actually, unions grew as a way to protect unqualified and easy to replace workers - a complete opposite to pilot or doctor. The type of workforce where withdrawing one's skill is not a threat for the company... Actually, Unions grew as a way to demand for safer working conditions, less arduous work...

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by kalvado
Thu Dec 20, 2018 4:04 pm
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

I'm not quite sure what you're getting at there? THere are a lot of things in this world controlled by a feedback loop. Starting from airliner pitch being controlled by a stabilizer to price of the milk in the store. Most of job market is one of those things largely controlled by a feedback loop (a...

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by kalvado
Thu Dec 20, 2018 1:37 pm
Forum: Technical/Operations
Topic: LA TLV-GRU only 8 cabin crew on 15 hour flight?
Replies: 17
Views: 2520

Re: LA TLV-GRU only 8 cabin crew on 15 hour flight?

Every country regulation is different for cabin crew. Only U.S.A. opted for for 50 passengers for one flight attendant. Everywhere else in the world it’s one cabin crew per operating door. Is that a verifiable fact? Because in South Africa we also have the 50 pax rule. As far as I can tell, EU went...

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by kalvado
Wed Dec 19, 2018 7:48 pm
Forum: Civil Aviation
Topic: "Christian" Airline Receives OK To Start-Up
Replies: 56
Views: 10448

Re: "Christian" Airline Receives OK To Start-Up

MalevTU134 wrote:
Prayair?

Prayair - on a prayer and a wing!

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by kalvado
Wed Dec 19, 2018 6:59 pm
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

You are talking as if the rest of the world enjoys much more favorable conditions. They generally do. If you do find a termination note on your desk tomorrow (and airlines in the UK can do that to pilots with 90 days notice) then you could probably find a similar job at a similar wage. For an exper...

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by kalvado
Wed Dec 19, 2018 5:58 pm
Forum: Civil Aviation
Topic: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang
Replies: 2691
Views: 495992

Re: Lion Air 737MAX8 Crashed Jakarta to Pangkal Pinang

Did the MAX8 actually enter water still in one piece or did it start to disassemble even before the final impact? Airplane was at 5000 feet = 1500 meters when it all started. Just falling down from that altitude would accelerate a body to ~120 m/s = 0.36 Mach at room temperature. Then there is air ...

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by kalvado
Wed Dec 19, 2018 5:20 pm
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

Being employed on an ‘at will’ basis very clearly puts the company in the driving seat. Not a good position for the employees at all. That is what most of the people in the back of the airplane are dealing with. Abusing them to benefit a few... If you think about it, pilot striking for the paycheck...

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by kalvado
Wed Dec 19, 2018 4:54 pm
Forum: Civil Aviation
Topic: ET 787 Wing damage at OSL
Replies: 14
Views: 5454

Re: ET 787 Wing damage at OSL

I just summarized all a,net approved very appropriate comments for such incidents. What an absolute disaster of an airline! Think of all the spare parts they just created. Guess the pilot didn’t follow the fancy shining lights The planes for Ethiopian need some extra warning lights Norwegian light ...

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by kalvado
Wed Dec 19, 2018 2:24 am
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

It always makes me laugh when there is some thread regarding a pilot strike on this forum!! The amount of anti-union and anti-pilot foaming at the mouth that goes on here is really incredible. I've been reading this forum from almost 17 years and I don't remember threads about how it was so unfair ...

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by kalvado
Tue Dec 18, 2018 10:20 am
Forum: Civil Aviation
Topic: Virgin Atlantic Pilots Planing Christmas Strike
Replies: 59
Views: 9384

Re: Virgin Atlantic Pilots Planing Christmas Strike

On the contrary, this is the perfect time to hold a strike. To strike when the market is quiet would be foolish as it would have no impact, whereas they can get maximum impact on the company bottom line by striking at the busiest time of the year. While this is a busy time of year for holiday trave...

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