Search found 316 matches

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by hitower3
Tue Dec 06, 2022 4:09 pm
Forum: Civil Aviation
Topic: Why are today's flight times longer than 25 years ago?
Replies: 75
Views: 11695

Re: Why are today's flight times longer than 25 years ago?

One point in addition to the ones already mentioned (ground taxi, congestion, cost index, slower mach numbers) is the EU regulation on passenger rights (EC directive No. 261/2004). It gives passengers the right to claim compensation between 250€ and 600€ for flights delayed by more than 3 hours. The...

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by hitower3
Mon Dec 05, 2022 2:42 pm
Forum: Technical/Operations
Topic: A350 BTV
Replies: 8
Views: 1707

Re: A350 BTV

BTV seems like a neat tool to assist the pilots in using the runway efficiently, reducing the risk of an airplane crawling along the runway after missing the right exit and forcing the next approaching airplane to go around. Wouldn't it be even more useful in the A320, given the mission profile of t...

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by hitower3
Wed Nov 30, 2022 4:02 pm
Forum: Technical/Operations
Topic: Hawker siddeley trident wing
Replies: 32
Views: 5492

Re: Hawker siddeley trident wing

Dear all, Thank you very much for these insights. I definitely learned something. Now I'd like to ask, how do they design the "automatic pitch down in a developing stall" in a straight wing, e.g. for the Q400 or ATR? A higher pitch angle at the wing root wouldn't change the center of lift ...

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by hitower3
Tue Nov 29, 2022 9:20 pm
Forum: Technical/Operations
Topic: Tyre measurements 747-400
Replies: 6
Views: 1672

Re: Tyre measurements 747-400

By the way, is it correct that the 747 has got the same tires on main gear and nose gear?

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by hitower3
Tue Nov 29, 2022 4:01 pm
Forum: Technical/Operations
Topic: Hawker siddeley trident wing
Replies: 32
Views: 5492

Re: Hawker siddeley trident wing

Here is the best I have: This is a very interesting drawing. Take a look at the obvious wing twist from the root to the tip. The angle of attack is significantly higher at the root. Would this design feature induce a stall behavior where the root stalls first, moving the center of lift backwards, t...

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by hitower3
Thu Nov 17, 2022 11:31 am
Forum: Civil Aviation
Topic: Time to talk about.....old airlines!
Replies: 271
Views: 26838

Re: Time to talk about.....old airlines!

Swissair is an airline to remember. I had the pleasure to fly with their then brand new MD-11 in Business class from ZRH to JFK in 1991. Impeccable service and great food. As a "always hungry" teenager back then, I was served all three menu choices in a row, to the greatest amusement of th...

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by hitower3
Wed Nov 16, 2022 7:49 pm
Forum: Military Aviation & Space Flight
Topic: Luftwaffe A350 Production/Delivery Thread - 2019-2022
Replies: 31
Views: 14635

Re: Luftwaffe A350 Production/Delivery Thread - 2019-2022

Devilfish wrote:

Hopefully, it wouldn't go tech on them anymore. :thumbsup:


I never understood why these government A340-300s performed so poorly. Their sister ships continue to fly for LH in regular service and don't show any signs of fatigue.

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by hitower3
Wed Nov 16, 2022 7:47 pm
Forum: Military Aviation & Space Flight
Topic: Luftwaffe A350 Production/Delivery Thread - 2019-2022
Replies: 31
Views: 14635

Re: Luftwaffe A350 Production/Delivery Thread - 2019-2022

Here an article in German about the second A350 for the Government: https://www.aero.de/news-43926/Olaf-Scholz-jettet-bald-mit-Konrad-Adenauer-um-die-Welt.html This aircraft is named after the first chancellor of FRG from 1949 to 1963, Konrad Adenauer. I just wonder why we need three such aircraft?

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by hitower3
Wed Nov 16, 2022 4:25 pm
Forum: Technical/Operations
Topic: What did well in 2008?
Replies: 9
Views: 1439

Re: What did well in 2008?

One sector of aviation not yet mentioned is military aviation. OEMs like Boeing and their suppliers are also active in the military branch, exactly because that sector is much more resilient against recessions. Airbus had several ups and downs following changes in the economic environment, so they d...

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by hitower3
Fri Oct 14, 2022 7:31 am
Forum: Technical/Operations
Topic: 787 vs A330 Runway Performance/Requirements
Replies: 55
Views: 6915

Re: 787 vs A330 Runway Performance/Requirements

1. New Ishigaki/Miyako-Narita/Haneda ISG-HND with the A330 would be able to take maximum structural payload, can easily do a 2 hr flight off a 6000' runway Dear zeke, I am always impressed about the RWY performance of modern WB jets at low weight. With a light fuel load, you can essentially operate...

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by hitower3
Tue Sep 06, 2022 8:53 am
Forum: Technical/Operations
Topic: International flights arriving a day before
Replies: 9
Views: 2055

Re: International flights arriving a day before

Hello, Historically, you are not the first person confused by this apparent discontinuity of time. Phileas Fogg, main character of Jules Verne's novel https://en.m.wikipedia.org/wiki/Around_the_World_in_Eighty_Days feared to have arrived one day late to win the bet of surrounding the Earth in 80 day...

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by hitower3
Thu Aug 18, 2022 2:39 pm
Forum: Technical/Operations
Topic: Autobrake question: MAX vs. RTO, and performance (and pax)
Replies: 49
Views: 5059

Re: Autobrake question: MAX vs. RTO, and performance (and pax)

2. As mentioned, MAX is never used on landing. MED is rarely used in our case. It's quite "sharp". Dear SB, I can confirm the "sharp" braking of MED autobrake on the A320. I once flew as a passenger on an OS A320, returning to Vienna RWY 29 on a late evening. The gate was on the...

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by hitower3
Fri Aug 12, 2022 12:03 pm
Forum: Technical/Operations
Topic: APU Thrust?
Replies: 13
Views: 2841

Re: APU Thrust?

I vaguely remember having seen a concept of an enlarged APU being able to provide a limited amount of additional thrust for a twin engine jet.

The idea was to slightly bump the MTOW under consideration of a failure of one main engine.

Best regards,
Hendric

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by hitower3
Wed Aug 03, 2022 12:12 pm
Forum: Technical/Operations
Topic: Trent 1000 variants
Replies: 9
Views: 1915

Re: Trent 1000 variants

The WP page has a comprehensive list of all variants.
https://en.m.wikipedia.org/wiki/Rolls-Royce_Trent_1000

Hendric

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by hitower3
Tue Jul 19, 2022 1:30 pm
Forum: Civil Aviation
Topic: Boom Supersonic new configuration.
Replies: 255
Views: 51471

Re: Boom Supersonic new configuration.

They might consider a cooperation with Rekkof for their experience in the field of hypothetical aircraft.

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by hitower3
Tue Jul 19, 2022 12:30 pm
Forum: Technical/Operations
Topic: Lufthansa LH797 - winter 2022 schedule
Replies: 5
Views: 1223

Re: Lufthansa LH797 - winter 2022 schedule

Dear Musa, Although there is a slight difference in normal cruise speed (M0,82 for the A340-300 vs. M0,85 for the A350), a major difference in flight time most likely comes from different routings. There is no significant restriction for the A340 to operate the ideal route from the Far East to Europ...

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by hitower3
Sun Jul 03, 2022 7:11 am
Forum: Civil Aviation
Topic: EK Incident at Brisbane: debris causes hole in wing join fairing
Replies: 42
Views: 10420

Re: EK Incident at Brisbane: debris causes hole in wing join fairing

Dear all, Here is my take on this occurrence, in the form of a hypothetical sequence of events: - A bolt detaches from the nose landing gear during take off roll. - The bolt rolls over the runway surface and hits the rearmost outer tire of the left body gear, wich receives damage in the process. - T...

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by hitower3
Fri Jun 17, 2022 7:17 am
Forum: Civil Aviation
Topic: AMS putting a limit on international passenger traffic through the airport
Replies: 132
Views: 24141

Re: AMS putting a limit on international passenger traffic through the airport

Dear all, I read several posts proposing to move some of the cancelled flights to regional airports like RTM. However, the Netherlands being a rather small country, would this shift solve the problem at all? If Schipol is short staffed, RTM will struggle to find additional staff as well - perhaps ev...

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by hitower3
Wed Jun 15, 2022 10:47 pm
Forum: Technical/Operations
Topic: Which is the most FUEL EFFICENT REGIONAL aircraft in the world ?
Replies: 16
Views: 3091

Re: Which is the most FUEL EFFICENT REGIONAL aircraft in the world ?

N1120A wrote:
What E195 is flying around with 146 passengers?


I took the maximum allowable seat capacity for both aircraft in order to get comparable results.

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by hitower3
Wed Jun 15, 2022 12:54 pm
Forum: Civil Aviation
Topic: What next for Airbus?
Replies: 164
Views: 31991

Re: What next for Airbus?

I’m sure they have a good idea what a new 36m wing would do for the A32x family. They might even have studies on 40m wings? Why box the A322/323 into 36m - everyone says it s a new category of plane. Would MoM have been in the 36m Box? Hello BD, The 36m wingspan limit comes from ICAO Annex 14 (Aero...

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by hitower3
Wed Jun 15, 2022 11:47 am
Forum: Technical/Operations
Topic: ERJ 145 Flying Manual
Replies: 1
Views: 1184

Re: ERJ 145 Flying Manual

I am pretty sure you can fly an ERJ-145 manually. :-)

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by hitower3
Wed Jun 15, 2022 11:45 am
Forum: Technical/Operations
Topic: Which is the most FUEL EFFICENT REGIONAL aircraft in the world ?
Replies: 16
Views: 3091

Re: Which is the most FUEL EFFICENT REGIONAL aircraft in the world ?

Dear FR, The ATR-72 had been advertized as "the most fuel efficient commercial aircraft" by the manufacturer literally decades ago, sporting an equivalent fuel consumption of "2,5 l/100km per passenger". This is still a good value by today's standards and it was achieved through ...

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by hitower3
Tue Jun 14, 2022 1:42 pm
Forum: Civil Aviation
Topic: What next for Airbus?
Replies: 164
Views: 31991

Re: What next for Airbus?

A modern 36m wing with a cleaned up design should give the A320 family a pretty good boost in efficiency. Dear FF, I agree with your statement. The A320 wing is the oldest wing in production at Airbus and only the 3rd wing design they ever made (after the A300 and the A310 which is different from t...

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by hitower3
Fri Jun 03, 2022 8:51 am
Forum: Civil Aviation
Topic: A321XLR vs first generation long haul jets
Replies: 34
Views: 13438

Re: A321XLR vs first generation long haul jets

Also, it'll be interesting to see just how many carriers take the optional forward fuel tank, and on what type of application. I suspect that, like with the 772LR, few carriers will ultimately select the optional tankage. Dear LAX772LR, I agree with your assumption. The 321XLR will have a sufficien...

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by hitower3
Fri Jun 03, 2022 6:57 am
Forum: Technical/Operations
Topic: Air France 447: 13 years on
Replies: 56
Views: 6698

Re: Air France 447: 13 years on

I'm by no means an expert but my understanding is that on AF447 the FBW system switched off due to a frozen Pitot tube and left two inexperienced pilots fly manually, without them realising what was actually happening. Had the FBW been functional, it would have prevented the stall and thus saved th...

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by hitower3
Thu Jun 02, 2022 2:15 pm
Forum: Civil Aviation
Topic: Condor News and Discussion Thread 2022
Replies: 207
Views: 45229

Re: Condor News and Discussion Thread 2022

("wood class" sounds fun - a Google mistranslation from the German). This is a fun translation error indeed. For the context, the German word "Holzklasse" - literal translation "wood class" refers to the third class in German railways, which was equipped with wooden be...

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by hitower3
Sun May 29, 2022 9:47 am
Forum: Civil Aviation
Topic: Bombardier launches the Global 8000
Replies: 25
Views: 6978

Re: Bombardier launches the Global 8000

Dear all,

Just to get an idea - what is the fuel burn penalty of cruising at M0,94 vs. M0,90? I could imagine that for some passengers of this aircraft, a few 1'000USD added cost is acceptable for arriving a bit earlier, still would be interested to know the numbers.

Kind regards,
Hendric

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by hitower3
Sun May 29, 2022 9:37 am
Forum: Civil Aviation
Topic: Boeing 777 Production/Delivery Thread - 2022
Replies: 159
Views: 64309

Re: Boeing 777 Production/Delivery Thread - 2022

I have the impression that at present, Boeing's civilian widebody programs are mainly supported by freighters. Fortunately, B is showing a strong portfolio in this expanding market.

Hendric

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by hitower3
Sun May 29, 2022 9:34 am
Forum: Civil Aviation
Topic: A321XLR vs first generation long haul jets
Replies: 34
Views: 13438

Re: A321XLR vs first generation long haul jets

Does the XLR feature anything different to improve fuel burn from the normal 32Q? So far it just looks like a boring upgrade with nothing too exciting. Dear Aseem, From a (potential) customer's perspective, the XLR is anything but boring, having secured hundreds of orders and many more to come. Tec...

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by hitower3
Sat May 28, 2022 5:38 pm
Forum: Civil Aviation
Topic: A321XLR vs first generation long haul jets
Replies: 34
Views: 13438

Re: A321XLR vs first generation long haul jets

viewtopic.php?t=1388811

Best regards!
Hendric
-->

Dear Mike,

I did a comparison between the LR and the 707 in this thread:
viewtopic.php?t=1388811

Best regards!
Hendric

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by hitower3
Sun May 08, 2022 6:36 pm
Forum: Technical/Operations
Topic: Double-hinged flap explained or shown??
Replies: 9
Views: 1504

Re: Double-hinged flap explained or shown??

Dear Convair, I am not entirely sure if the author may not have meant "double slotted flaps", as the DC10's flaps were single slotted. If it was indeed about double hinged flaps, the idea could have been an implementation of a NASA patent from 1967: https://ntrs.nasa.gov/citations/19700032...

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by hitower3
Sun May 08, 2022 12:37 pm
Forum: Technical/Operations
Topic: CFM Engine High Oil Consumption
Replies: 28
Views: 4211

Re: CFM Engine High Oil Consumption

Just a practical question: In the case of tri-jets, in particular the DC-10 and MD-11, the engine nr. 2 is mounted some 10m above ground. How is the oil level control and top-up performed? Logically, a cherry picker or similar device would be required to access the engine. Or is there a possibility ...

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by hitower3
Fri May 06, 2022 2:45 pm
Forum: Civil Aviation
Topic: Six arrests after brawl on board KLM flight
Replies: 56
Views: 13423

Re: Six arrests after brawl on board KLM flight

Aircraft was parked at the gate when this brawl broke out. So at not time was there any risk inflight. Call was made to the military police at Schiphol who arrived quickly and removed the party. This from a internal klm memo. Dear Flanker7, Thank you for this important clarification! In this case t...

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by hitower3
Fri May 06, 2022 8:08 am
Forum: Civil Aviation
Topic: Six arrests after brawl on board KLM flight
Replies: 56
Views: 13423

Re: Six arrests after brawl on board KLM flight

One thing that I find disturbing (apart from the recurrence of such events in general) is that in this case the captain entered the passenger cabin attempting to calm the fighters. In my view as someone not familiar with the relevant procedures in place, isn't this a significant risk for this situat...

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by hitower3
Fri Apr 29, 2022 7:50 am
Forum: Civil Aviation
Topic: BEA : EgyptAir MS804 crash caused by pilot smoking
Replies: 62
Views: 15851

Re: BEA : EgyptAir MS804 crash caused by pilot smoking

Dear all, Regarding flammability of materials, there is a significant property called the Limit Oxygen Index (LOI). This index, expressed in %, defines the concentration of oxygen required to allow the material in question to sustain combustion at room temperature. Typical insulation materials have ...

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by hitower3
Fri Apr 29, 2022 7:36 am
Forum: Technical/Operations
Topic: Augmented crew - logging flight hours
Replies: 28
Views: 4531

Re: Augmented crew - logging flight hours

Dear all, Thank you for the interesting insights so far! Let me formulate a bonus question: How are pilots logging flight hours in practice? Have you got a classic booklet where you had write your hours? Is it an online tool or a program on your PC? Would you take these records with you in case of c...

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by hitower3
Mon Apr 25, 2022 12:49 pm
Forum: Civil Aviation
Topic: Airbus A321XLR Development / Testing / Production Thread - 2022
Replies: 187
Views: 54219

Re: Airbus A321XLR Development / Testing / Production Thread - 2022

By the way, will the XLR get a separate ICAO designator?

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by hitower3
Mon Apr 18, 2022 6:51 am
Forum: Technical/Operations
Topic: Augmented crew - logging flight hours
Replies: 28
Views: 4531

Augmented crew - logging flight hours

Dear all, Just a short, stupid question: How are flight hours logged for pilots in an augmented crew setting? Let's assume a 12h flight with a crew of 3 (CA, FO, Cruise pilot). Would all 3 get the full 12h flight time credited to their logbook, or only these hours they are actually on duty? Thanks! ...

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by hitower3
Tue Apr 12, 2022 2:38 am
Forum: Technical/Operations
Topic: Can Singapore Airlines 253 seats A350 do SIN-NYC mission if they are 280T variant?
Replies: 17
Views: 4257

Re: Can Singapore Airlines 253 seats A350 do SIN-NYC mission if they are 280T variant?

5% contingency is normally not required for this type of flight. Some sort of variable contingency depending on route and conditions is carried. Often several tonnes less than 5%. 0.5 hours of reserve fuel is carried, and typically diversion fuel is also no less than 0.5 hours even if the nearest a...

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by hitower3
Mon Apr 11, 2022 2:33 pm
Forum: Technical/Operations
Topic: Can Singapore Airlines 253 seats A350 do SIN-NYC mission if they are 280T variant?
Replies: 17
Views: 4257

Re: Can Singapore Airlines 253 seats A350 do SIN-NYC mission if they are 280T variant?

Dear SQ32,

0,6 hours of reserve fuel is just a little on the low side. :D
A contingency of 5% (5,6t) must be accounted for, plus diversion (a few tons), plus final reserve (3t).

Maybe your assumptions for OEW and flight time are a little on the high side.

Best regards,
hendric

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by hitower3
Mon Apr 11, 2022 7:52 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1260
Views: 498950

Re: China Eastern 737-800 crashes in Guangxi, southern China

Malaysia Airlines' incident a few weeks ago, also a 738. Similarities? https://www.straitstimes.com/asia/se-asia/malfunction-of-pitot-static-system-affected-tawau-bound-malaysia-airlines-flight "Based on initial reports extracted from the flight data recorder (FDR), it was determined that a te...

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by hitower3
Sun Apr 10, 2022 4:13 am
Forum: Technical/Operations
Topic: Location of data plate on Airbus aircraft
Replies: 17
Views: 3030

Re: Location of data plate on Airbus aircraft

There are at least two of them: one in the door frame of L1, one in the rearmost door on the left side.

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by hitower3
Fri Apr 08, 2022 10:35 am
Forum: Civil Aviation
Topic: DHL 757 off runway at SJO
Replies: 131
Views: 26540

Re: DHL 757 off runway at SJO

Why do they refer to 'two souls on board' rather than two people?. This seemingly bizarre terminology is used to avoid any confusion. "Passengers" would not account for flight and cabin crew, "people" would not account for lap children, as they are treated differently on the pas...

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by hitower3
Wed Apr 06, 2022 8:50 am
Forum: Civil Aviation
Topic: AF 011 go around - Possible flight control issue
Replies: 106
Views: 32907

Re: AF 011 go around

Can someone with knowledge in the 777 systems please give us a hint what is the signification of the alarm sounds in the flight deck which can be heard in the video? Autopilot disconnect wailer. Dear allnippon767, The sound at 0:43 is similar to a configuration warning sound. Could you confirm this...

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by hitower3
Wed Apr 06, 2022 6:48 am
Forum: Civil Aviation
Topic: AF 011 go around - Possible flight control issue
Replies: 106
Views: 32907

Re: AF 011 go around

Can someone with knowledge in the 777 systems please give us a hint what is the signification of the alarm sounds in the flight deck which can be heard in the video?

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by hitower3
Mon Apr 04, 2022 12:58 pm
Forum: Civil Aviation
Topic: Condor launch new livery
Replies: 271
Views: 34695

Re: Condor launch new livery

Honestly, I am amused!
I would say that this livery does indeed fulfill the main purpose: make the airline recognisable while transporting the image of the carrier.

I'd say: "mission accomplished!"

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by hitower3
Mon Mar 21, 2022 9:02 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1260
Views: 498950

Re: China Eastern 737 "Missing Contact"

High altitude stall ? While it's too early to speculate about the cause(s) of this accident, a stall looks rather unlikely. Based on FR24 data, the speed remains very constant, as the rate of descent. A stall would require a drop in airspeed, followed by a rapid onset of a descent, followed by sign...

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by hitower3
Tue Mar 15, 2022 6:24 pm
Forum: Technical/Operations
Topic: Sahara dust over Europe
Replies: 6
Views: 2889

Re: Sahara dust over Europe

Quick answer: most likely not at all. This phenomenon happens every now and then, typically several times a year. While the chemical composition _might_ be somewhat similar to volcanic ash, the concentration is a lot lower. Also, Aircraft are regularly operating in desertic places, where flying sand...

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by hitower3
Fri Mar 11, 2022 9:06 am
Forum: Civil Aviation
Topic: Russian Invasion of Ukraine - Civil Aviation Related *Discussion* Thread
Replies: 1169
Views: 440236

Re: Russian Invasion of Ukraine - Civil Aviation Related *Discussion* Thread

Dear all, Someone in the area of Kyev seems to have fun with an ADS-B transponder: https://www.flightradar24.com/FCKPUTIN/2b196bf0 We can observe the (in fact destroyed) An-225 flying circles around the capital and displaying an identification code in the form of an insult against the Russian leader...

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by hitower3
Thu Mar 03, 2022 8:55 am
Forum: Technical/Operations
Topic: Flying a G-II with full reverse thrust? (Shuttle Training Aircraft)
Replies: 3
Views: 1846

Re: Flying a G-II with full reverse thrust? (Shuttle Training Aircraft)

Dear ehbowen, Highly interesting, thank you. And this is how it actually looked like flying the brick simulator aircraft: https://www.youtube.com/watch?v=z44bEm9MO6w There was also an episode of "Flying heavy metal" documentary series about this aircraft, but I could not find it. Kind rega...

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