Search found 159 matches

by hitower3
Mon Aug 10, 2020 12:57 pm
Forum: Technical/Operations
Topic: Fokker 70/100 Air Brake & Wing Config
Replies: 1
Views: 287

Fokker 70/100 Air Brake & Wing Config

Dear all, A few years back I was a regular passenger on Austrian's F70/F100 fleet, totaling about 100 flights over the years. In retrospect, I could observe a few particularities in regards to its wing and air brake configuration that set it apart from the ubiquitous A320 and B737 families. First, t...

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by hitower3
Thu Jul 23, 2020 8:11 pm
Forum: Technical/Operations
Topic: Parallel Runway Assignment
Replies: 15
Views: 1381

Re: Parallel Runway Assignment

In Munich, the runways are specifically assigned for landings (08R and 26R) and departures (08L and 26L). The reason is that the runways are longitudinally displaced in such a way that taxi times for both incoming and departing traffic are minimized. Thanks for the info. I remember going with my co...

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by hitower3
Wed Jul 22, 2020 3:14 pm
Forum: Technical/Operations
Topic: Parallel Runway Assignment
Replies: 15
Views: 1381

Re: Parallel Runway Assignment

A few famous examples from Europe: (...) Munich - similar config with 08/26. They are using the runways depending on departure, to separate flows north/south. Basically traffic south (eg Italy) will get the southern rwy while northbound (say nordic countries) will use northern ones. Dear gloom, In ...

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by hitower3
Sat Jun 20, 2020 1:38 pm
Forum: Civil Aviation
Topic: Aberdeen ground collision
Replies: 31
Views: 7544

Re: Aberdeen ground collision

Very interesting video has emerged... https://mobile.twitter.com/breakingavnews/status/1274034217727508488 While somewhat amusing, I also noticed some dangerous actions by the people involved: just imagine the guy attempting to stop the plane by pushing against the MLG strut would lose balance and ...

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by hitower3
Wed Jun 17, 2020 2:02 pm
Forum: Technical/Operations
Topic: Could an airliner save fuel by being unstable
Replies: 22
Views: 2857

Re: Could an airliner save fuel by being unstable

(A380 backup flight control) Not really sure. The A380, rather logically, seems to have systems that are halfway between the A330 and the A350. For example, it has a trim tank like the A330 for CG control, and it has EBHAs and EHAs (electrohydraulic actuators) for backup control like the A350. Dear...

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by hitower3
Sun Jun 14, 2020 4:48 pm
Forum: Technical/Operations
Topic: Could an airliner save fuel by being unstable
Replies: 22
Views: 2857

Re: Could an airliner save fuel by being unstable

Interesting read! This triggers one more question: how much fuel could possibly be saved by the means of giving up the inherent stability? If we define "unstable" as "the horizontal stabilizer will not provide a continuous down force in normal flight" (I am not sure about this de...

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by hitower3
Thu Jun 11, 2020 5:28 pm
Forum: Technical/Operations
Topic: Airbus technical "genealogy"
Replies: 6
Views: 1764

Re: Airbus technical

The direct family tree for the designs is: A330 from A300B11 design studies A340 from A300B9 design studies B9 and B11 are switched around sometimes in articles and documents, but I've been assured the above is correct. Dear northstar, Many thanks for your insightful answer, it was a highly interes...

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by hitower3
Wed Jun 10, 2020 6:20 pm
Forum: Technical/Operations
Topic: Landing - Thrust Reverse and Brake
Replies: 33
Views: 2264

Re: Landing - Thrust Reverse and Brake

Fun anecdote regarding autobrake: Back in 2005, I was traveling aboard a CRJ200 from Austrian, taxiing to the departure runway 34 at VIE. As it is a rather long way to go, the pilot was throttling up to get the plane to speed. Apparently, he pushed the throttle too much and when he retarded, the bra...

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by hitower3
Wed Jun 10, 2020 6:00 pm
Forum: Technical/Operations
Topic: Airbus technical "genealogy"
Replies: 6
Views: 1764

Re: Airbus technical "genealogy"

The triple chime, ("dit, dit, dit") is called the "triple click" and it does not indicate AP disengagement. It indicates an automatic mode reversion. AP disengagement is indicated by the "cavalry charge" sound. Ok, I stand corrected. It is the cavalry charge "blee...

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by hitower3
Wed Jun 10, 2020 2:32 pm
Forum: Civil Aviation
Topic: The Sud Aviation SE-210 Caravelle Thread
Replies: 124
Views: 15166

Re: The Sud Aviation SE-210 Caravelle Thread

Quick and stupid question: Why didn't any aircraft manufacturer use triangular windows past the Caravelle?

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by hitower3
Wed Jun 10, 2020 2:21 pm
Forum: Technical/Operations
Topic: Electric taxiing tug?
Replies: 9
Views: 1737

Re: Electric taxiing tug?

I would think that, while your idea might sound interesting, there are likely the following drawbacks: - Aircraft compatibility. Traditional tug need to connect to different aircraft by the means of different bars. Some exotic aircraft even need to carry their own tow bar in order to get pushed. - P...

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by hitower3
Wed Jun 10, 2020 1:55 pm
Forum: Technical/Operations
Topic: Airbus technical "genealogy"
Replies: 6
Views: 1764

Airbus technical "genealogy"

Dear all, I was thinking about tracing back the technical evolution of Airbus airliners. This means, how did the technology evolve from older models into the current line-up. For some aircraft it's pretty straightforward: Let's take the A330 NEO - it's based on the CEO with some refined engines (RR ...

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by hitower3
Wed Jun 10, 2020 1:41 pm
Forum: Civil Aviation
Topic: The Sud Aviation SE-210 Caravelle Thread
Replies: 124
Views: 15166

Re: The Sud Aviation SE-210 Caravelle Thread

Germania. https://www.google.com/search?q=SE+Caravelle+Germania&client=safari&rls=en&tbm=isch&source=iu&ictx=1&fir=e4MHaFhNyEbt4M%253A%252CaeWsvSyde02TiM%252C_&vet=1&usg=AI4_-kT_R9wyEi7BjRak8fXVNqkg4X21Ew&sa=X&ved=2ahUKEwjC9buqz_LpAhXJqqQKHUp6BhAQ9QEwAHoECAoQ...

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by hitower3
Mon Jun 08, 2020 4:06 pm
Forum: Civil Aviation
Topic: The Sud Aviation SE-210 Caravelle Thread
Replies: 124
Views: 15166

Re: The Sud Aviation SE-210 Caravelle Thread

Dear a-netters,

One of my very first flights was on the Caravelle. Back in 1982, we went home from Gran Canaria Island to Cologne CGN. I remember it had a green cheatline and vertical stabilizer. Does anyone know which airline it could have been?

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by hitower3
Wed May 27, 2020 9:39 am
Forum: Technical/Operations
Topic: The future of inflight showers
Replies: 22
Views: 3063

Re: The future of inflight showers

A great part of the A380s crown is unsuitable for seating passengers due to ceiling height and the staircase. That is where airlines placed their showers and oversized toilets. The 777 didn't really have these unusable areas. The 747 did, but it was all above the main cabin, which was impractical t...

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by hitower3
Mon May 25, 2020 1:55 pm
Forum: Civil Aviation
Topic: PIA A320 (flight PK8303) crashes in Karachi
Replies: 730
Views: 154402

Re: PIA A320 (flight PK8303) crashes in Karachi

Yes, that is correct. The gear doors only retract if you have hydraulic pressure. I don't know which hydraulic system runs the gear on the A320, but since they seem to have lost both engines it is a bit of a moot point in this case. Dear Starlionblue, The gear is operated by the GREEN hydraulic sys...

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by hitower3
Tue May 19, 2020 8:46 am
Forum: Technical/Operations
Topic: Ground height of today’s wide-bodies
Replies: 22
Views: 3596

Re: Ground height of today’s wide-bodies

Dear all, The height of the landing gear is - as many other design choices - a compromise. Advantages of a taller landing gear: - Higher rotation angle possible - Higher bank angle possible before risking a wingtip or engine nacelle strike - Possibility to further stretch the fuselage (e.g. A320 to ...

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by hitower3
Mon May 18, 2020 2:17 pm
Forum: Technical/Operations
Topic: Did EL AL 720Bs every fly NYC ?
Replies: 13
Views: 2766

Re: Did EL AL 720Bs every fly NYC ?

Dear denny, Let me try go through the numbers: With a OEW of 51.2t (I am surprised how light that plane is!) and a MTOW of 106,1t, the aircraft has 54,9t to share among payload and fuel. Assuming 112 pax (typical 2-class) and 4t of cargo, we have about 15t of payload, leaving about 40t for fuel. Ass...

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by hitower3
Wed May 06, 2020 1:42 pm
Forum: Technical/Operations
Topic: What's the OEW of A330-800 and A330-900?
Replies: 11
Views: 1721

Re: What's the OEW of A330-800 and A330-900?

According to Wikipedia, the dry weights of the respective engines are as follows:
Trent 700 (A332/A333); 6'160kg
Trent 7000 (A338/A339): 6'445kg

Therefore, the engine upgrade (without housing and attachment) would add only 570kg to the structural weight.

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by hitower3
Wed Apr 08, 2020 1:34 pm
Forum: Civil Aviation
Topic: Braniff A320 question
Replies: 15
Views: 3586

Re: Braniff A320 question

These birds must have been among the very first - 200s built, isn't it? As you can see in the OP they have cn’s in the 50-60s range. Hello! Precisely. In the meantime I have researched a little. The first A320-200 was cn 22, initially delivered to Ansett Australia on 1988-11-18. The first A320-200 ...

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by hitower3
Wed Apr 08, 2020 1:26 pm
Forum: Technical/Operations
Topic: A330 vs A330NEO wing area question/typo?
Replies: 6
Views: 1407

Re: A330 vs A330NEO wing area question/typo?

I once read (here?) that there are different ways to determine the wing area. Maybe the two values stated in the OP were measured according to different methods?

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by hitower3
Wed Apr 08, 2020 1:09 pm
Forum: Civil Aviation
Topic: Braniff A320 question
Replies: 15
Views: 3586

Re: Braniff A320 question

These birds must have been among the very first - 200s built, isn't it?

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by hitower3
Thu Apr 02, 2020 8:16 am
Forum: Technical/Operations
Topic: Using passenger aircraft as freighters during this crisis
Replies: 20
Views: 4231

Re: Using passenger aircraft as freighters during this crisis

Austrian has operated a number of cargo-only flights from China to VIE using their 777-200ER. Two such flights were announced to have brought no less than 130t (65t per aircraft) back to Austria - an impressive figure for a pax-configured aircraft. Pictures showed boxes being stowed on pax seats and...

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by hitower3
Tue Mar 31, 2020 9:35 am
Forum: Civil Aviation
Topic: Austrian Airlines 77E flying VIE-SYD nonstop!
Replies: 23
Views: 6795

Re: Austrian Airlines 77E flying VIE-SYD nonstop!

That's because the OP is still very enthusiastic at something that's perhaps still new or unusual for that person. Spot on! :-) Usually, Austrian Airlines isn't flying any further than US west coast, Japan and South Africa, none of which brings a 77E to its payload-range limit. Now, the rescue flig...

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by hitower3
Mon Mar 30, 2020 11:51 am
Forum: Civil Aviation
Topic: Austrian Airlines 77E flying VIE-SYD nonstop!
Replies: 23
Views: 6795

Austrian Airlines 77E flying VIE-SYD nonstop!

Dear all, I noticed a flight operated by OS yesterday, using a 777-200ER OE-LPD from Vienna to Sydney. It is likely a rescue flight to bring back stranded EU citizens. https://www.flightradar24.com/data/aircraft/oe-lpd I know that in the past, a BA 747-400 did a LHR-SYD run and IIRC a 330-200 was on...

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by hitower3
Tue Mar 17, 2020 9:30 am
Forum: Technical/Operations
Topic: How do elevons work differentially to generate BOTH roll and pitch simultaneously?
Replies: 6
Views: 1294

Re: How do elevons work differentially to generate BOTH roll and pitch simultaneously?

Interesting thread indeed.
While I could imagine that the task of programming a digital FBW is already highly complex - but how the heck did they manage to implement this complex logic in an analog aircraft like the Concorde?

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by hitower3
Tue Mar 10, 2020 11:36 am
Forum: Civil Aviation
Topic: Thai Airways Airbus A330 chops tail off gulfstream IV
Replies: 31
Views: 9132

Re: Thai Airways Airbus A330 chops tail off gulfstream IV

So basically the vertical stabilizer becomes a horizontal stab and vice-versa...

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by hitower3
Wed Feb 26, 2020 2:40 pm
Forum: Civil Aviation
Topic: Lufthansa (Eurowings) Announces Frankfurt to Calgary
Replies: 26
Views: 3537

Re: Lufthansa Announces Frankfurt to Calgary

I was not even aware of the fact that Lufthansa had the 330-200 in their fleet. Could it be a Brussels / Eurowings aircraft?

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by hitower3
Thu Feb 13, 2020 10:52 am
Forum: Technical/Operations
Topic: Derating a turboprop engine
Replies: 22
Views: 2062

Re: Derating a turboprop engine

Is 2132/2750 the prop RPM? This does not indicate engine power. The props are variable pitch, so the RPM would remain pretty much the same in the cruise regardless of power settings. FYI, as far as I remember, the props of modern Turboprop aircraft revolve at significantly lower RPM, like 800-900. ...

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by hitower3
Thu Feb 13, 2020 10:37 am
Forum: Civil Aviation
Topic: Jet2 drunk passenger jailed.
Replies: 60
Views: 5840

Re: Jet2 drunk passenger jailed.

Francoflier wrote:

Don't air forces charge the airline for the cost of the interception in these cases?


At least the Austrian Air Force does not send a bill. The cost of the intervention is covered by the Defence budget.

BR Hendric

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by hitower3
Tue Feb 11, 2020 10:47 am
Forum: Technical/Operations
Topic: Stormy weather - Impact on fatigue?
Replies: 4
Views: 1736

Stormy weather - Impact on fatigue?

Dear all, This is one question I would like to address to the flying personnel. As a rather hefty storm named "Sabine" is blowing over Europe, we aviation enthusiasts are served with some spectacular airport operation videos. But what is the impact of stormy weather and the resulting chall...

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by hitower3
Mon Jan 27, 2020 10:35 am
Forum: Military Aviation & Space Flight
Topic: USAF E-11A plane crash in Afghanistan
Replies: 97
Views: 19623

Re: Ariana Afghan crash?!

Reported that it crashed in the Sado Khel area of Deh Yak district of Ghazni province around 1:10 p.m. local time. A major Taliban controlled area. I imagine it will be very hard for the free press to get to the crash site. Dear Piedmont, Not only the free press will struggle to (and likely refrain...

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by hitower3
Mon Jan 27, 2020 10:30 am
Forum: Military Aviation & Space Flight
Topic: USAF E-11A plane crash in Afghanistan
Replies: 97
Views: 19623

Re: Ariana Afghan crash?!

It appears to be JY-JAL, a 31 year old B767 flying the route Kabul-Herat that disappeared from radar at an altitude of 26,000 ft about 13 minutes after take-off. https://www.flightradar24.com/data/aircraft/jy-jal#23a9d7fa Taliban shootdown? Hello, The airliner you mention appears to belong to anoth...

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by hitower3
Fri Jan 03, 2020 7:39 pm
Forum: Civil Aviation
Topic: why 2L boarding door on DL 75's?
Replies: 44
Views: 7571

Re: why 2L boarding door on DL 75's?

catiii wrote:

The nacelle is too close on the 321 to do it, and anyway the 2L door on future build 321s is going away.


Well, I actually have boarded a 321 through 2L, that was LH in Frankfurt. But you are right, the nacelle is very close to the jetway.
Hendric

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by hitower3
Tue Dec 24, 2019 10:36 pm
Forum: Civil Aviation
Topic: Do airlines reuse flight number of their terminated destination?
Replies: 42
Views: 5801

Re: Do airlines reuse flight number of their terminated destination?

On a side note, airlines seem to ban flight numbers that have encountered a catastrophic accident. E. G. AF447.

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by hitower3
Wed Dec 18, 2019 5:04 pm
Forum: Technical/Operations
Topic: Aircraft types with "spotless" safety record?
Replies: 48
Views: 4906

Re: Aircraft types with "spotless" safety record?

Well to conclude in regards to the initial question the list of jet airliners with no catastrophic accidents, no matter the cause, would be: -Dassault Mercure -Airbus A340 -Airbus A380 -Bombardier C-Series -Boeing 787 -Ilyushin Il-96 (Without respecting subtypes, with them the list would be a lot l...

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by hitower3
Wed Dec 18, 2019 10:39 am
Forum: Technical/Operations
Topic: Aircraft types with "spotless" safety record?
Replies: 48
Views: 4906

Re: Aircraft types with "spotless" safety record?

Isn't A340-300 Air France crashed one at Toronto among a rainy weather condition? Dear celestar, Yes, there was a crash landing of an AF A340-300 at Toronto Pearson on August 2nd, 2005, flight AF358. Miraculously, there were no fatalities while the aircraft burned down after the evacuation. Accordi...

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by hitower3
Fri Dec 13, 2019 11:04 am
Forum: Technical/Operations
Topic: A321XL ICAO aircraft type designator?
Replies: 10
Views: 1976

Re: A321XL ICAO aircraft type designator?

Starlionblue wrote:
Do the sharklets increase wing span? Gate space might have something to do with it, but I don't know for sure.


Dear Starlionblue,

Yes indeed the added wingspan is quite significant: from 34,10m to 35,80m that is 1,7m more.

Best regards,
Hendric

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by hitower3
Fri Dec 13, 2019 11:01 am
Forum: Technical/Operations
Topic: Aircraft types with "spotless" safety record?
Replies: 48
Views: 4906

Re: Aircraft types with "spotless" safety record?

Absolutely, I forgot the A350...

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by hitower3
Thu Dec 12, 2019 2:56 pm
Forum: Technical/Operations
Topic: Aircraft types with "spotless" safety record?
Replies: 48
Views: 4906

Aircraft types with "spotless" safety record?

Dear a.netters, One of the most striking progresses that have been in the commercial aviation over the last decades is in the area of safety. The accident rate has been dropping continuously to the point that tragedies have become a very rare occurrence. This leads me to the question whether we have...

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by hitower3
Tue Dec 10, 2019 3:36 pm
Forum: Technical/Operations
Topic: Professional pilots: what else do you fly?
Replies: 13
Views: 2807

Re: Professional pilots: what else do you fly?

Dear all,

Many thanks for your contributions. Looks like flying is addictive, even though you're spending quite some time behind the yoke during your job...

Best regards,
Hendric

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by hitower3
Tue Dec 10, 2019 3:32 pm
Forum: Technical/Operations
Topic: STOL performance from airliner
Replies: 22
Views: 1784

Re: STOL performance from airliner

Hello, The actual runway usage of a specific aircraft type greatly depends on internal factors takeoff weight, flap configuration, power setting at takeoff, as well as external factors like wind, temperature and air density (altitude). The aircraft types you mentioned are not renowned for being shor...

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by hitower3
Wed Dec 04, 2019 6:53 pm
Forum: Technical/Operations
Topic: TCAS/ATC
Replies: 16
Views: 1401

Re: TCAS/ATC

TCAS is an autonomous system, and it works from its own interrogation of other aircraft. There is no data link to controllers' scopes or systems. Dear Sccutler, Thank you for your quick answer. Indeed, one of the main reasons for the Überlingen disaster was a conflicting instruction from ATC. Even ...

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by hitower3
Wed Dec 04, 2019 6:44 pm
Forum: Technical/Operations
Topic: Professional pilots: what else do you fly?
Replies: 13
Views: 2807

Professional pilots: what else do you fly?

Hello dear a.netters, This is a question addressed to those of you who make a living from flying aircraft. So, outside of your job, do you fly other aircraft for leisure? A Cessna 172, a glider, a Mustang? Or is it rather the case that, given the many hours you already spend in the air, you would ra...

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by hitower3
Wed Dec 04, 2019 6:39 pm
Forum: Technical/Operations
Topic: TCAS/ATC
Replies: 16
Views: 1401

Re: TCAS/ATC

Interesting topic, which lets me ask one more question:
Is there any automated way for the ATC controller to be made aware of an ongoing TCAS RA? Or do they depend on a radio call by the pilots flying the RA procedure?

Best regards,
Hendric

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by hitower3
Wed Dec 04, 2019 6:36 pm
Forum: Technical/Operations
Topic: TCAS/ATC
Replies: 16
Views: 1401

Re: TCAS/ATC

Interesting topic, which lets me ask one more question:
Is there any automated way for the ATC controller to be made aware of an ongoing TCAS RA? Or do they depend on a radio call by the pilots flying the RA procedure?

Best regards,
Hendric

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by hitower3
Sun Dec 01, 2019 9:49 am
Forum: Civil Aviation
Topic: Austrian Airlines, European Widebodies
Replies: 15
Views: 2731

Re: Austrian Airlines, European Widebodies

Austrian quite frequently uses 772 and sometimes also 763 on VIE-FRA hauls. One flight attendant explained that this was done because of capacity needs (the plane was packed indeed). The crew currency argument seems quite plausible to me as well. Remember that Swiss has introduced the 77W over the l...

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by hitower3
Thu Nov 28, 2019 9:19 am
Forum: Technical/Operations
Topic: When is the A/P disengaged on landing?
Replies: 24
Views: 2191

Re: When is the A/P disengaged on landing?

Airbus perspective: As chimborazo says for a full autoland the autopilots (plural) stay in until rollout. Hello Starlionblue, Just chiming in with a stupid question: How is this "dual autopilot" thing working? I assume there are two autopilot systems in commercial aircraft for redundancy ...

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by hitower3
Wed Nov 13, 2019 2:33 pm
Forum: Technical/Operations
Topic: Cost of “fuel tankering”?
Replies: 94
Views: 7126

Re: Cost of “fuel tankering”?

Dear all, Let me try to get back to the original question and put some numbers on it. I will use the simplified formula "Hourly consumption equals 4% of actual aircraft weight" mentioned earlier, which should apply to A320ceo / B738 category aircraft. I heard a figure of 2,6% for the A350,...

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by hitower3
Fri Oct 11, 2019 9:46 am
Forum: Technical/Operations
Topic: Remember smoking in the cockpit ?
Replies: 42
Views: 14056

Re: Remember smoking in the cockpit ?

There is this nice video about the route proofing of the then-brand new Airbus A340-200 at Lufthansa, back in 1993.
https://youtu.be/3qMHgtrSlwk?t=221

Captain Dorfmeister lights up a cigar...

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