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by mxaxai
Fri Feb 24, 2017 10:15 pm
Forum: Civil Aviation
Topic: Would polar routings solve the problem of sonic booms for future SST travel?
Replies: 19
Views: 3825

Re: Would polar routings solve the problem of sonic booms for future SST travel?

But what if efficiency gains allow Mach 2 or 3 at today's premium economy prices? Flying supersonic would become affordable for most travellers, especially for those on company budgets. Well, yes. If we could have supersonic speeds with no additional cost, it would be successful, assuming the techn...

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by mxaxai
Fri Feb 24, 2017 3:57 pm
Forum: Civil Aviation
Topic: Would polar routings solve the problem of sonic booms for future SST travel?
Replies: 19
Views: 3825

Re: Would polar routings solve the problem of sonic booms for future SST travel?

The question asked isn't actually the right question. ... Once that happens, then the whole sonic boom issue can be revisited and the overland issue could theoretically go away. So can it be done and realistically how soon? With respect, the real question is should it be done even if the sonic boom...

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by mxaxai
Fri Feb 24, 2017 11:39 am
Forum: Technical/Operations
Topic: PW1100G Bearing Failure
Replies: 27
Views: 7138

Re: PW1100G Bearing Damage

So which one is causing bearing damage on the PW1100G engine, and how can it be resolved? Let's hope it is a manufacturing issue rather than a design issue. But the fact that is seems to be happening so consistently on so many frames suggests that it might be more than just a bad batch. The good th...

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by mxaxai
Thu Feb 23, 2017 10:14 pm
Forum: Civil Aviation
Topic: Flybe Landing Gear Collapse at Schiphol
Replies: 36
Views: 15221

Re: Flybe Landing Gear Collapse at Schiphol

It did touch down quite hard with the (collapsed) right gear first. Is it possible for the prop to hit the ground given a large enough bank angle (with gear down obviously)?

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by mxaxai
Wed Feb 22, 2017 10:41 am
Forum: Technical/Operations
Topic: Why do jets leave a white trail in the sky?
Replies: 24
Views: 4561

Re: Why do jets leave a white trail in the sky?

I've seen contrails in a clear sky that cause complete overcast weather within an hour or so here in South Africa. What you have there is a coincidence. I've seen many a contrail in the skies above me on wonderfully clear days and no overcast conditions thereafter. Seriously, you can take that tin ...

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by mxaxai
Tue Feb 21, 2017 11:39 pm
Forum: Technical/Operations
Topic: Why do jets leave a white trail in the sky?
Replies: 24
Views: 4561

Re: Why do jets leave a white trail in the sky?

Maybe due to the lower speed? You can easily see cars "smoking" on cold winter days but I have yet to see a foggy airport as a result of contrails. Their exhaust gasses are colder as well.

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by mxaxai
Tue Feb 21, 2017 10:13 pm
Forum: Civil Aviation
Topic: Crossing the atlantic with 3 of 4 engines
Replies: 18
Views: 5877

Crossing the atlantic with 3 of 4 engines

In this recent incident, a LH 744 was enroute from Denver to Frankfurt, approximately 180 nm east of Sept Iles, QC, Canada. After discussing with dispatch and maintenance the crew decided to continue to FRA despite having effectively the entire atlantic ahead of them. I know the case of the BA 744 w...

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by mxaxai
Tue Feb 21, 2017 9:58 pm
Forum: Technical/Operations
Topic: Why do jets leave a white trail in the sky?
Replies: 24
Views: 4561

Re: Why do jets leave a white trail in the sky?

Remember that moisture alone is not sufficient for condensation. You need some dust in the air to provide a condensation nuclei. Now, if the air is already moist, the engines' soot alone creates much of the contrail. This is also the reason why sometime the contrails spread out much further even lon...

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by mxaxai
Tue Feb 21, 2017 10:37 am
Forum: Technical/Operations
Topic: Fuselage stretch/shortening
Replies: 11
Views: 2492

Re: Fuselage stretch/shortening

Since wings and wingboxes are identical or very similar for all mentioned models, you could use templates depicting the side (used for e. g. homemade liveries) and perform measurements. For the A320 family Wikipedia is your friend. Compared with the A320, the A321's major change is the stretched fus...

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by mxaxai
Mon Feb 20, 2017 1:26 pm
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 306379

Re: SpaceX - Tests, Launches, Developments

Still absolutely incredible every time I see it... I hope their first flight(s) with refurbished first stages due soon work out fine and, most importantly, that they manage to do what NASA never did with the Shuttle, which is getting the refurbishment effort down to a minimum. I guess that's the re...

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by mxaxai
Fri Feb 17, 2017 10:28 pm
Forum: Civil Aviation
Topic: Swiss aviation thread - 2017 (41)
Replies: 515
Views: 102787

Re: Swiss Aviation Thread 41

I think they will one day come too, especially SIN and BKK. The A350 should do it for Singapore, and probably a 787-8 for Thai. But I don't think it will be before the East Wing is completed. Edit: Ranjan Jha, General Manager Singapore Airlines for Switzerland in an interview last year: "Ist G...

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by mxaxai
Tue Feb 14, 2017 11:08 pm
Forum: Civil Aviation
Topic: Did the regional jet kill off service to many local airports.
Replies: 55
Views: 7643

Re: Did the regional jet kill off service to many local airports.

There are many reasons contributing to the decline. First of all, the mergers, integration and changed competition certainly reduced the need to feed smaller regional hubs. If you can serve a large area via a single, large hub without having to share with several other network carriers you can get r...

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by mxaxai
Sat Feb 04, 2017 5:34 pm
Forum: Civil Aviation
Topic: CX poised to have an all-widebody, all-twins passenger fleet. Who's else/next?
Replies: 34
Views: 7592

Re: CX poised to have an all-widebody, all-twins passenger fleet. Who's else/next?

Singapore Airlines seems likely unless Airbus actually creates the A380NEO. EK would be headed down a similar path.

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by mxaxai
Tue Jan 31, 2017 11:34 am
Forum: Technical/Operations
Topic: Will single engine designs be viable in the future?
Replies: 33
Views: 3789

Re: Will single engine designs be viable in the future?

Modern airliners require, for certification, redundant systems. In the Part 23 transport I fly there are 2 and often 3 redundant components for any given system. Anything that has only one, such as APU, isn't needed for flight. Engine reliability might improve but it will never be 100%. Would YOU f...

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by mxaxai
Tue Jan 31, 2017 11:25 am
Forum: Technical/Operations
Topic: Taxiing, braking, and the IAE-V2500 on the Airbus
Replies: 9
Views: 1670

Re: Taxiing, braking, and the IAE-V2500 on the Airbus

I am quite sure that I have seen A320s equipped with CFM-56 set one engine in idle reverse on long downhill taxis. Never a V2500 though, but they are not as common (local operators seem to prefer the CFM) and I am not sure about 737s. IIRC they don't. Beyond that, bucket reversers of all kinds regul...

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by mxaxai
Wed Jan 25, 2017 3:08 pm
Forum: Civil Aviation
Topic: "Green" airports
Replies: 26
Views: 2885

Re: "Green" airports

Many airports worldwide are taking measures to reduce their impact. Most airports try to reduce taxi distances, Stuttgart (STR) is moving to 100 % electrical vehicles, others are building highly efficient powerplants dedicated to the airport. I believe most western airports have some sort of environ...

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by mxaxai
Fri Jan 20, 2017 9:19 am
Forum: Technical/Operations
Topic: 767 Engine Choice
Replies: 22
Views: 4240

Re: 767 Engine Choice

Also bear in mind the max take-off weight range was quite big, from a low of 284,000lbs on the -200 up to 413,000lbs on the -300ER, you simply would not need 60,000lb engines on the lower weight planes! I see I was unclear. The 767-200er (that particular model) could go from 48,000 to 60,000. The 7...

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by mxaxai
Wed Jan 18, 2017 10:39 am
Forum: Military Aviation & Space Flight
Topic: Swarming UAV footage released
Replies: 7
Views: 2111

Re: Swarming UAV footage released

The limiting factor is how fast can you 3D print them? How are these things powered? You can't 3D print batteries, or electric motors, and small thermal engines might be within reach of the metal 3D printing technology but that would be awfully tricky to achieve on the field. Are they using some so...

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by mxaxai
Fri Jan 13, 2017 12:58 pm
Forum: Technical/Operations
Topic: AOA Question.
Replies: 17
Views: 3145

Re: AOA Question.

Your latter statement is correct. Regard these pages: https://www.grc.nasa.gov/www/Wright/airplane/incline.html http://code7700.com/angle_of_attack.html I would not expect it to be exactly identical, though, escpecially when operating at very low speeds or close to Mach 1. At some point shock effect...

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by mxaxai
Fri Jan 13, 2017 10:42 am
Forum: Military Aviation & Space Flight
Topic: SpaceX - Tests, Launches, Developments
Replies: 2083
Views: 306379

Re: SpaceX - Tests, Launches, Developments

The main thing different about the Falcon Heavy is there has yet to be a commercial satellite that will max out its payload capacity, which they claim will be 54 tonnes to LEO and 22 tonnes to Geosynchronous Transfer Orbit. That's twice the Ariane V or Delta IV Heavy, two of the highest capacity la...

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by mxaxai
Fri Jan 13, 2017 10:32 am
Forum: Technical/Operations
Topic: Are black liveries "bad"?
Replies: 72
Views: 12153

Re: Are black liveries "bad"?

In this article a professor for aircraft design confirms that, indeed, it is primarily related to cooling the aircraft. The more heat the fuselage absorbs the higher the workload of the AC, resulting in higher fuel burn. http://www.berliner-zeitung.de/ratgeber/reise/warum-sind-flugzeuge-eigentlich-w...

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by mxaxai
Thu Jan 12, 2017 6:26 pm
Forum: Military Aviation & Space Flight
Topic: PAK-FA - RCS / stealth design shortcomings? Esp. at rear?
Replies: 46
Views: 7812

Re: PAK-FA - RCS / stealth design shortcomings? Esp. at rear?

The Russians invented stealth??? No, for real. The west just happened to have Computers fast enough to actually apply the theory to an airframe. P.Ya. Ufimtsev: Method of Edge Waves in the Physical Theory of Diffraction The National Air Intelligence Center bought it, translated it, probably violate...

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by mxaxai
Thu Jan 12, 2017 10:35 am
Forum: Civil Aviation
Topic: CX to BCN
Replies: 11
Views: 4763

Re: CX to BCN

Interestingly, this will be Cathay's only summer seasonal destination in Europe! It shows to what extent BCN is just a leisure destination and not much else. On the other hand, a business destination like MAD started year-round from the day of announcement. That is not true! Even though tourism is ...

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by mxaxai
Tue Jan 03, 2017 11:37 am
Forum: Technical/Operations
Topic: Propliners boarding from rear. Why?
Replies: 19
Views: 2386

Re: Propliners boarding from rear. Why?

One might consider the hazard of running into the prop as well, which is mitigated by boarding as far away from them as possible, i. e. the rear. Although you probably would not leave them running during boarding anyway, but for the few occurences it may have been useful. As for the comet, it likely...

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by mxaxai
Mon Jan 02, 2017 6:10 pm
Forum: Technical/Operations
Topic: Why did Tricycle landing gears replaced the tail draggers
Replies: 46
Views: 7132

Re: Why did Tricycle landing gears replaced the tail draggers

Some further reasons: ⋅ A taildragger is easier to load/unload without ground support equipment, e. g. airstairs. I suppose as airports became more sophisticated, this aspect became less relevant. ⋅ A taildragger helps to keep the props at a distance from the ground. As stronger ...

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by mxaxai
Thu Dec 29, 2016 12:16 pm
Forum: Civil Aviation
Topic: Airbus A350 Production And Delivery Thread - 2016-2017 (Part 17)
Replies: 4438
Views: 1556051

Re: A350 Production And Delivery Thread Part 17

"Aircraft Campus" sounds like some sort of educational program. Do you happen to know what kind of flight testing they want to do?

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by mxaxai
Thu Dec 29, 2016 8:29 am
Forum: Technical/Operations
Topic: Question on the fuel consumption
Replies: 5
Views: 1004

Re: Question on the fuel consumption

I suppose it is because the endurance can be determined quite accurately, whereas your range will change with your speed as you get pushed or hindered by varying winds. That way, one can calculate the remaining flight time and compare it to the remaining endurance to get an overview of the flight's ...

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by mxaxai
Mon Dec 19, 2016 9:18 pm
Forum: Site Related
Topic: New Airliners.net Homepage Preview
Replies: 152
Views: 14852

Re: New Airliners.net Homepage Preview

Honestly, I would really prefer a "dark" mode. All the light blue in a dark environment just doesn't go well. As the new version has now been turned into the standard one, please make the photo thumnails larger than a thumbnail. Its a pain for people with medium sized screens. There is lot...

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by mxaxai
Mon Dec 19, 2016 11:22 am
Forum: Civil Aviation
Topic: Airbus Delivery - Why Toulouse & Hamburg?
Replies: 24
Views: 4119

Re: Airbus Delivery - Why Toulouse & Hamburg?

Well, I suppose I had assumed/remembered wrongly.

Anyway, since A380 production seems likely to end by the next decade this discussion's point will become moot. Perhaps the free space will be used for a second A350/A330Neo FAL or outfitting, though.

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by mxaxai
Mon Dec 19, 2016 10:17 am
Forum: Civil Aviation
Topic: Airbus Delivery - Why Toulouse & Hamburg?
Replies: 24
Views: 4119

Re: Airbus Delivery - Why Toulouse & Hamburg?

That is true today. Historically however, in 1967 its length was a mere 1360 m and until 2006 remained at 2684 m.

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by mxaxai
Mon Dec 19, 2016 8:18 am
Forum: Civil Aviation
Topic: Airbus Delivery - Why Toulouse & Hamburg?
Replies: 24
Views: 4119

Re: Airbus Delivery - Why Toulouse & Hamburg?

The runway at XFW was until recently quite short. Therefore, deliveries to far away airlines needed to stop somewhere. So it was decided that such deliveries would take place in TLS, where the runway is sufficiently long.

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by mxaxai
Sun Dec 18, 2016 8:45 am
Forum: Site Related
Topic: New Airliners.net Homepage Preview
Replies: 152
Views: 14852

Re: New Airliners.net Homepage Preview

I have now tested it on different devices and came to the conclusion that the new design works better on smartphones (<5.5"), yet worse on laptops (10" - 15") and again slightly better on proper desktops compared to the current version. Since I primarily use said laptop, it may be why...

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by mxaxai
Fri Dec 16, 2016 10:37 am
Forum: Military Aviation & Space Flight
Topic: F15, F16, F18, F35mass production question
Replies: 4
Views: 1620

Re: F15, F16, F18, F35mass production question

Indeed it's not just the output alone that would be critical an an all out war. Obviously, since all countries who might end up in a situation to be forced to mass produce advanced fighters own nukes, this is likely a purely theoretical discussion. During WW2, the japanese forces had more advanced e...

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by mxaxai
Thu Dec 15, 2016 10:52 pm
Forum: Military Aviation & Space Flight
Topic: Bulgaria will buy new fighter jets
Replies: 41
Views: 5808

Re: Bulgaria will buy new fighter jets

So is it supposed to be like this:
Italy proposes (used?) Eurofighters
Portugal proposes (used?) F-16s
USA propose F-35s or (new?) F-16s
Sweden proposes Gripens

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by mxaxai
Thu Dec 15, 2016 10:46 pm
Forum: Site Related
Topic: New Airliners.net Homepage Preview
Replies: 152
Views: 14852

Re: New Airliners.net Homepage Preview

I'll be honest. Even though I hated the new design initially, I have become accustomed to it. Therefore, I will highlight some pros of the current design: The dark blue is a lot softer on the eyes than the very light blue dominating the "new" one. It is also a lot more consistent. Addition...

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by mxaxai
Thu Dec 08, 2016 10:43 am
Forum: Civil Aviation
Topic: Airline profits to drop, oil prices to rise in 2017
Replies: 38
Views: 5676

Re: Airline profits to drop, oil prices to rise in 2017

Let's see how many airlines the next fuel spike will cost. Especially certain european carriers will run into problems.

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by mxaxai
Sun Dec 04, 2016 8:49 pm
Forum: Civil Aviation
Topic: Why is the A320-2XXceo NEVER Associated with the '80's?
Replies: 10
Views: 2293

Re: Why is the A320-2XXceo NEVER Associated with the '80's?

Futheron, people dont associate it with the '80s because it's neither a typical design nor was it very popular. The A320 introduced stuff like digital FBW, glass cockpits and quiet high bypass-ratio engines, lending it a sterile touch few people could identify themselves with. It's not an overpowere...

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by mxaxai
Thu Nov 24, 2016 9:36 pm
Forum: Military Aviation & Space Flight
Topic: Future of western fighter production lines
Replies: 118
Views: 46237

Re: Future of western fighter production lines

Depends. I don't expect Russian or Chinese fighters in RAF or Luftwaffe. However, future acquisitions by semi-allied countries, as I would consider many in Africa or south-eastern Asia, may face a tougher competition. Additionally, most fighters compete for similar markets. F/A-18, F-15, Rafale &...

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by mxaxai
Mon Nov 21, 2016 9:56 pm
Forum: Civil Aviation
Topic: Will these aircraft fly again? (Teruel)
Replies: 3
Views: 1281

Will these aircraft fly again? (Teruel)

4073547 I just found this photo, which got me wondering whether any of the aircraft visible are going to fly again commercially. Most appear to be in well preserved states. I can identify: 3x A340-600 ex LH 1x A340-500/600 white 2x 747-400 ex KL 1x 747-400 ex BA 5x 747-400 ex UN 1x 747-400F ex 6U (...

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by mxaxai
Sun Nov 20, 2016 5:13 pm
Forum: Civil Aviation
Topic: Emirates first half profits down 75%
Replies: 183
Views: 28334

Re: Emirates first half profits down 75%

Do you really think that some marginal customer savings are worth recking your national aviation industry over, with all the consequential loss of jobs? No, I also don't understand the logic of giving over-generous access to your market when you have major airlines operating in your country and the...

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by mxaxai
Sun Nov 20, 2016 12:21 pm
Forum: Civil Aviation
Topic: Emirates Mulls Cheaper Long-Haul Flights as LCCs Grow
Replies: 15
Views: 5751

Re: Emirates Mulls Cheaper Long-Haul Flights as LCCs Grow

The only way to reduce ticket prices without hurting your bottomline is to reduce the CASM. Since they are already operating very efficient aircraft, enjoy low salaries and offer average service, the only way to do that is to increase the seating density. Since that is quite difficult on a 10-abreas...

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by mxaxai
Mon Nov 14, 2016 6:46 pm
Forum: Military Aviation & Space Flight
Topic: Bulgaria will buy new fighter jets
Replies: 41
Views: 5808

Re: Bulgaria will buy new fighter jets

The new Bulgarian president after Sunday's election is heavily "pro Putin" apparently. He is also a former Air Force chief. Are they still going for western aircraft or will they be looking at what Russia offers? Any info from our Bulgarian members will be greatly appreciated. Apparently,...

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by mxaxai
Thu Nov 10, 2016 3:26 pm
Forum: Civil Aviation
Topic: Flybe to launch Dusseldorf Base
Replies: 9
Views: 2265

Re: Flybe to launch Dusseldorf Base

DUS also happens to be a large base for LGW (Airberlin) Q400s. That might help with maintenance and hiring new pilots with that type rating.

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by mxaxai
Wed Nov 09, 2016 7:58 pm
Forum: Civil Aviation
Topic: JFK Vision 2040+ by Hollwich Kushner
Replies: 31
Views: 6023

Re: JFK Vision 2040+ by Hollwich Kushner

What's the point though? JFK never seemed to have problems with gate shortages. Rather, slots are valuable, and I don't see a new runway. It looks very nice, but it also includes demolishing all of todays terminals, some of which are working quite well, and replacing them with a new construction off...

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by mxaxai
Tue Nov 08, 2016 11:50 am
Forum: Civil Aviation
Topic: Turkish Aviation November 2016
Replies: 140
Views: 17403

Re: Turkish Aviation November 2016

According to "aviation expert" Murat Herdem - I don't know how reputable he his - TK is seeing these changes: ⋅ up to 40 % less PAX from (some) EU destinations ⋅ about 40 - 50 ("4 dozen") aircraft to be stored short term ⋅ (temporary) reduction of st...

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by mxaxai
Mon Nov 07, 2016 11:18 am
Forum: Civil Aviation
Topic: Ryanair to grow to 585 aircraft by 2024
Replies: 21
Views: 5032

Re: Ryanair to grow to 585 aircraft by 2024

Italy, Belgium, Germany...
Probably hoping to finish off Alitalia, Brussels and Airberlin, or supercede them once they collapse. They can get there before other LCC try it.
However, Vueling (Italy) and Easyjet (Germany) have been expanding recently as well.

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by mxaxai
Sun Nov 06, 2016 8:11 pm
Forum: Civil Aviation
Topic: The Lufthansa 737 phase-out thread
Replies: 46
Views: 9250

Re: The Lufthansa 737 phase-out thread

They fly an interesting route. From KEF they followed a heading across Greenland which is usually used to reach the US west coast. But west of Greenland both planes turned south. Why? I assume for ETOPS reasons. These 737s were only used on short intra-europe hops and it would not have been worth t...

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by mxaxai
Fri Nov 04, 2016 10:36 pm
Forum: Military Aviation & Space Flight
Topic: Bulgaria will buy new fighter jets
Replies: 41
Views: 5808

Re: Bulgaria will buy new fighter jets

Not sure what EF and F-16 offer the Mig-29 can't. They are all roughly the same age, especially if considering used frames. The Mig-29 is a very capable fighter. Maintenance and upgrades may be easier though, with especially the F-16 being operated in large numbers and both designs still in producti...

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by mxaxai
Mon Oct 24, 2016 7:53 pm
Forum: Technical/Operations
Topic: Internet On Planes
Replies: 4
Views: 3528

Re: Internet On Planes

Wel, time has passed and technology has moved on. Internet anywhere we desire at excellent to medium bandwidths is todays reality. Incredibly enough, it was unimaginable 16 years ago, at a time when airliners.net was still in its infancy.

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by mxaxai
Thu Oct 20, 2016 3:59 pm
Forum: Civil Aviation
Topic: Will any of the European big 3 (Lufthansa Group, AFKLM, IAG) unite under a single brand.
Replies: 61
Views: 7911

Re: Will any of the European big 3 (Lufthansa Group, AFKLM, IAG) unite under a single brand.

A problem is that most names are very country-specific. Ryanair, Air Asia or Easyjet could be an airline from anywhere, but Air France , British Airways, Brussels Air, Swiss , Austrian Airlines all contain their place of origin in the name. Some may recall BA's attempt to enter the german market, wh...

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