Search found 21334 matches

by Starlionblue
Mon Feb 06, 2023 1:57 am
Forum: Technical/Operations
Topic: why "Turnpads" are of different shapes and sizes ?
Replies: 9
Views: 694

Re: why "Turnpads" are of different shapes and sizes ?

Sawaa Dee Khap/Namaste and Hello Fellow Avgeekers, So my homebase [ LKO ( Lucknow ) VILK] is getting a makeover in the upcoming months and that specifically includes the " EXTENSION OF TURNPADS " now Im an avgeek,plane spotter and make videos however not privy to the profound technical ar...

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by Starlionblue
Mon Feb 06, 2023 1:53 am
Forum: Technical/Operations
Topic: United Airlines and A320's RNP Question
Replies: 28
Views: 2340

Re: United Airlines and A320's RNP Question

I prefer to just take the visual to be honest…. Sometimes this is a good option. It has to be availabe and visibility requirements have to be fulfilled, however. In many cases, you really want that priceise guidance, for example with high terrain surrounding the airport. HKG's approaches to the new...

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by Starlionblue
Fri Feb 03, 2023 9:38 am
Forum: Technical/Operations
Topic: Engine Buzzsaw Fade Out
Replies: 5
Views: 819

Re: Engine Buzzsaw Fade Out

The buzzsaw is caused by the fan blade tips going supersonic. It is a stream of sonic booms.

The fadeout is probably a combination of:
- Decreased air density, meaning you can't hear it as well in the cabin.
- Decrease in N1 with the tips no longer going supersonic.

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by Starlionblue
Tue Jan 31, 2023 8:36 am
Forum: Technical/Operations
Topic: United Airlines and A320's RNP Question
Replies: 28
Views: 2340

Re: United Airlines and A320's RNP Question

While discussing RNP, do these also have a particular vertical path to fly between waypoint to waypoint? Or is it basically just curvy, precise, obstacle-weaving approaches? Yes, there is typically a vertical path dependent on the altitude constraints. In NAV (VNAV) the aircraft will manage the des...

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by Starlionblue
Tue Jan 31, 2023 12:03 am
Forum: Technical/Operations
Topic: Question re ILS + STAR approaches
Replies: 14
Views: 1002

Re: Question re ILS + STAR approaches

Or do you have to fiddle with editing the plan in the FMC. Martinlest, yes, sometimes you do, depending on how the procedures (STAR/approach) load into the FMS, based upon transitions, VIAs, etc. As you can tell from the previous responses, the best "takeaway" I can offer you in this case...

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by Starlionblue
Mon Jan 30, 2023 12:25 am
Forum: Technical/Operations
Topic: Question re ILS + STAR approaches
Replies: 14
Views: 1002

Re: Question re ILS + STAR approaches

I think that is a flight sim issue. That was my initial thought upon checking into this thread having had some experience with FMC issues in Flight Sim in the past, but nonetheless, it sparked my curiosity about real-world FMC use. I'd be interested to hear what any real-world pilots have to say ab...

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by Starlionblue
Mon Jan 30, 2023 12:12 am
Forum: Technical/Operations
Topic: Do pilots with a 757/767 rating really fly all of the variants?
Replies: 39
Views: 5112

Re: Do pilots with a 757/767 rating really fly all of the variants?

That's amazing work from the flight dynamics people, system architects, and coders at Airbus if they could make a 2010's wide body fly like a mid 80s narrowbody. I fly the 90s widebody derived from the 80s narrowbody, as well as the 2010s widebody. It is indeed amazing that the philosophy created f...

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by Starlionblue
Mon Jan 30, 2023 12:04 am
Forum: Technical/Operations
Topic: Engine Derates and top-of-climb power
Replies: 78
Views: 3990

Re: Engine Derates and top-of-climb power

Just remember a “derate” is like putting a different thrust engine rating on the plane, “Reduced” is the engine’s thrust rating reduced due to conditions, but full rated thrust is there. A key point. And an important one to bring up during the departure briefing. If you're using a derate you specif...

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by Starlionblue
Sun Jan 29, 2023 10:22 am
Forum: Technical/Operations
Topic: Question re ILS + STAR approaches
Replies: 14
Views: 1002

Re: Question re ILS + STAR approaches

I think that is a flight sim issue. The charted ILS 02 approach plate doesn’t show a CF02 When you load the ILS 02 it will try to link the approach to the STAR with an APPR VIA PESEX. Which then loads the box with PT422 PESEX NETVO without the discontinuity. If you do no transition then it loads th...

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by Starlionblue
Sun Jan 29, 2023 10:18 am
Forum: Technical/Operations
Topic: Do pilots with a 757/767 rating really fly all of the variants?
Replies: 39
Views: 5112

Re: Do pilots with a 757/767 rating really fly all of the variants?

I recall reading the at EASA allows pilots to be rated and current on the A330 & A350 at the same time, whereas the FAA doesn’t allow it. I believe it’s the same with the 777 & 787 I'm 99% sure the FAA doesn't let you fly both the 777 and 787 at the same time. But if you transition from one...

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by Starlionblue
Sat Jan 28, 2023 12:09 am
Forum: Technical/Operations
Topic: Do pilots with a 757/767 rating really fly all of the variants?
Replies: 39
Views: 5112

Re: Do pilots with a 757/767 rating really fly all of the variants?

Memory items have to be to same for a common type rating to my understanding. I don't think that's trye. I can only speak for the A330 and A350 but there are differences in the memory items. You can even have differences within type depending on equipment. For example, when we got the A350 it had a...

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by Starlionblue
Sat Jan 28, 2023 12:06 am
Forum: Technical/Operations
Topic: Pitot-Static Tubes
Replies: 8
Views: 728

Re: Pitot-Static Tubes

The flow conditions on different fuselages, and at different spots on the same fuselage, vary. Hence why you see, for instance, airliners with two static ports per system, one on each side. If you have some sideslip, the conditions on either side can vary widely. Only by averaging and perhaps mathem...

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by Starlionblue
Thu Jan 26, 2023 10:43 am
Forum: Technical/Operations
Topic: Engine Derates and top-of-climb power
Replies: 78
Views: 3990

Re: Engine Derates and top-of-climb power

It also seems that, given the relative trends in high engine temps and fuel burn since 2005, the industry would have shifted more towards climb derate as standard practice (though higher oil prices might counteract that calculus). Are climb derates now standard practice? When we received RR powered...

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by Starlionblue
Thu Jan 26, 2023 2:15 am
Forum: Technical/Operations
Topic: Engine Derates and top-of-climb power
Replies: 78
Views: 3990

Re: Engine Derates and top-of-climb power

Thanks for confirming, that's super helpful. Sounds like the answer to the OP is "derate is for low-altitude and it goes away near ToC." That is a good way of putting it. Engines lose thrust with altitude due to lower mass flow in thinner air. Hence why cruise power is pretty near maximum...

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by Starlionblue
Wed Jan 25, 2023 11:02 am
Forum: Technical/Operations
Topic: Engine Derates and top-of-climb power
Replies: 78
Views: 3990

Re: Engine Derates and top-of-climb power

What are actual derate parameters? Something internal to engine like N1, fuel flow, temperature? Or engine actually gets altitude information and thrust is limited according to preprogrammed formula? On all Boeing non-737 models climb derates are a fixed percentage of full climb there. There are tw...

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by Starlionblue
Sun Jan 22, 2023 8:30 am
Forum: Technical/Operations
Topic: True Altitude
Replies: 16
Views: 1357

Re: True Altitude

GPS altitude is altitude above a reference plane of a gravitational earth model, not any physical terrain. So it doesn’t correspond with MSL. https://www.esri.com/news/arcuser/0703/geoid1of3.html So while using GPS altitude wouldn’t cause any issues in cruise flight, using GPS altitude near the sur...

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by Starlionblue
Sat Jan 21, 2023 4:51 am
Forum: Technical/Operations
Topic: True Altitude
Replies: 16
Views: 1357

Re: True Altitude

We might see GPS, or "True", altitude in use at some point in the future. I've read some stuff about such an implementation. But I don't think we're anywhere close. Pressure altimetry has the advantage of being entirely self-contained in the aircraft. GPS can be jammed, something that happ...

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by Starlionblue
Sat Jan 21, 2023 4:44 am
Forum: Technical/Operations
Topic: True Altitude
Replies: 16
Views: 1357

Re: True Altitude

No need to, pressure works well. I know it works well, especially up high. I was thinking about redundancy over accuracy. Most new airliners have what, at least 2 GPS, right? How many independent pressure altimeter systems does your typical airliner have? Is there an alternate static source for pre...

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by Starlionblue
Sat Jan 21, 2023 4:31 am
Forum: Technical/Operations
Topic: ETOPS In Flight Shutdown Statistics
Replies: 48
Views: 3868

Re: ETOPS In Flight Shutdown Statistics

AFAIK, "4 Engines 4 Long Haul" was more or a Virgin Atlantic marketing gimmick than something Airbus pushed really strongly. That being said, it did sense from a marketing perspective for Airbus. Boeing had the 777, but Airbus had the A330/A340, with the long-haul version being a quad. If ...

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by Starlionblue
Sat Jan 21, 2023 3:47 am
Forum: Technical/Operations
Topic: How are MELs practically handled at airlines?
Replies: 15
Views: 1910

Re: How are MELs practically handled at airlines?

Here's a story: I was a line mechanic once upon a time. We has a little fold out table in the jetway so that we could do paperwork out there and give the crew access to the flight deck. It was an international flight at a US domestic airline. The crew came down the jetway dragging their bags. The C...

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by Starlionblue
Sat Jan 21, 2023 3:35 am
Forum: Technical/Operations
Topic: True Altitude
Replies: 16
Views: 1357

Re: True Altitude

No need to, pressure works well. I know it works well, especially up high. I was thinking about redundancy over accuracy. Most new airliners have what, at least 2 GPS, right? How many independent pressure altimeter systems does your typical airliner have? Is there an alternate static source for pre...

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by Starlionblue
Fri Jan 20, 2023 7:18 am
Forum: Technical/Operations
Topic: How are MELs practically handled at airlines?
Replies: 15
Views: 1910

Re: How are MELs practically handled at airlines?

An example of how the MEL can be referred to but not technically applied after dispatch. If you get certain engine fault messages, but the engine is still running, while taxiing out, you should apply the ECAM procedure. But in many cases the procedure is nothing else than "crew awareness"....

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by Starlionblue
Fri Jan 20, 2023 1:38 am
Forum: Technical/Operations
Topic: How are MELs practically handled at airlines?
Replies: 15
Views: 1910

Re: How are MELs practically handled at airlines?

For starters, typically a light won't "go off" to make us dig into MELs. ;) If a light goes off (most likely accompanied by an ECAM/EICAS message) we apply the appropriate procedure, electronic or paper. MELs can only be applied before dispatch (defined as park brake off). After that, they...

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by Starlionblue
Thu Jan 19, 2023 11:53 pm
Forum: Technical/Operations
Topic: 737-800 Single Engine landing
Replies: 15
Views: 1871

Re: 737-800 Single Engine landing

FWIW, our procedure is to pull both reversers if at least one engine or reverser is working. For example, if one reverser is MELed we'd still pull both. We'd only not pull reverse if both were inop. This prevents us from pulling the wrong one with an engine or reverser inop.If you pull both, you'll ...

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by Starlionblue
Wed Jan 18, 2023 11:55 pm
Forum: Technical/Operations
Topic: United Airlines and A320's RNP Question
Replies: 28
Views: 2340

Re: United Airlines and A320's RNP Question

UA's 319/320 fleet received RNP AR authorization in June, although each individual aircraft has to be approved. Both crew training and upgrades to the avionics (MMR) are required for a 319/320 to accept an RNP AR approach. Some of the older 320s will never be RNP AR approved due to avionics limitat...

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by Starlionblue
Wed Jan 18, 2023 11:54 pm
Forum: Technical/Operations
Topic: Places in world where USA based airlines cannot overfly
Replies: 9
Views: 1696

Re: Places in world where USA based airlines cannot overfly

A good example is the Disneyland (the real one, in Anaheim) "TFR" (that's permanent, but will always be called a TFR cause we want to pretend they bought the Bush administration off). That gets transited nearly all the time, by necessity, because of the proximity of multiple airports and ...

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by Starlionblue
Wed Jan 18, 2023 11:52 pm
Forum: Technical/Operations
Topic: Studying before PPL training
Replies: 22
Views: 1025

Re: Studying before PPL training

AirKevin wrote:
zeke wrote:
I think most professional pilots will tell you to get the initial class 1 before you spend a lot of money on training. I thought class 3 was for ATC.

Class 3 is for private pilot.

In the US, yes. In most of the rest of the world, PPL requires a Second Class medical.

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by Starlionblue
Wed Jan 18, 2023 2:06 am
Forum: Technical/Operations
Topic: Studying before PPL training
Replies: 22
Views: 1025

Re: Studying before PPL training

Thanks so much all for the answers. I have learned not to have the urge to "stand out" but rather to continue to work hard and study well. Just wanted to clarify, yeah, ERAU's my main dream, but I have a lot of safety colleges, including a few that some have pointed out in this thread. Th...

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by Starlionblue
Wed Jan 18, 2023 2:00 am
Forum: Technical/Operations
Topic: Places in world where USA based airlines cannot overfly
Replies: 9
Views: 1696

Re: Places in world where USA based airlines cannot overfly

As 1120A said, most SUA can be transmitted, if not in use. The ranges north of Las Vegas are pretty much closed all the time, but even the warning areas off the coast may be opened. Don’t confuse overseas prohibitions with US SUA or TFRs, different animals. Even the general SFAR has exemptions, but...

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by Starlionblue
Wed Jan 18, 2023 12:47 am
Forum: Technical/Operations
Topic: Studying before PPL training
Replies: 22
Views: 1025

Re: Studying before PPL training

Yes and no. :) Before my PPL training, I completed the King Schools computer-based training. This helped me immensely. But the school had told me to do this so it's a bit of a different situation. Don't overthink it. You'll have lots of misconceptions that need to be corrected anyway. ;) In my view,...

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by Starlionblue
Tue Jan 17, 2023 4:33 pm
Forum: Technical/Operations
Topic: JFK 22R/L Approach Question
Replies: 21
Views: 2016

Re: JFK 22R/L Approach Question

I still say, I can plan a better route into KJFK 22's more direct. You have so much space over Long Island Sound and Conn. to line the planes up away from KLGA, KEWR and KISP. Think about the extra 1/2 hour x 1000 planes x 365 days. The fuel saving along will be astronomical. Somew how, you can hit...

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by Starlionblue
Sun Jan 08, 2023 11:51 pm
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

200 km/h landing speed isn't significantly lower than jet landings speeds currently. Around 110 knots vs 130-ish. 85% of current speeds, not two-thirds. If your plane cruises at 500km/h, or 270 knots, it would not be far off current jets either. Again, 85-90% of jet cruise speed (in IAS). I said be...

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by Starlionblue
Sun Jan 08, 2023 8:19 am
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

200 km/h landing speed isn't significantly lower than jet landings speeds currently. Around 110 knots vs 130-ish. 85% of current speeds, not two-thirds. If your plane cruises at 500km/h, or 270 knots, it would not be far off current jets either. Again, 85-90% of jet cruise speed (in IAS). Either way...

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by Starlionblue
Sun Jan 08, 2023 3:52 am
Forum: Technical/Operations
Topic: US pilot moving to the UK
Replies: 12
Views: 1993

Re: US pilot moving to the UK

From these responses it is obvious that there is a lot of differences in the requirements for CPL in the US and in the UK (and I am assuming here EU). Could you give some indications of the key things you had to cover compared to the US? Thanks In a broad sense, the exams are much more focused on a...

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by Starlionblue
Sun Jan 08, 2023 3:38 am
Forum: Technical/Operations
Topic: Aircrew scheduling question.
Replies: 8
Views: 2539

Re: Aircrew scheduling question.

A similar thing happened during Covid, in order to avoid layovers in places where crew would be subject to quarantine in case they tested positive.

For example, both EK and KL ran their HK services with a stop in BKK for a crew change, instead of direct.

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by Starlionblue
Sun Jan 08, 2023 3:28 am
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

I'm imagining the hydrogen engine operates continuously throughout the flight. The fuel systems within the aircraft are kept separate and operate independently. From a fuel management perspective 1/3 will be hydrogen the remaining 2/3s conventional. These numbers are very simplistic so the exact pr...

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by Starlionblue
Sat Jan 07, 2023 3:39 am
Forum: Technical/Operations
Topic: Minimum requirements of airport for commercial pax service
Replies: 9
Views: 1753

Re: Minimum requirements of airport for commercial pax service

Most airlines will have all kinds of minimum requirements of an airport before they will consider flying passengers to/from there In higher income countries (e.g. USA, Canada, Europe, wealthier parts of Asia, etc...), what are the legal minimums from regulators for an airline to fly a 20+ seat pass...

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by Starlionblue
Fri Jan 06, 2023 11:46 pm
Forum: Technical/Operations
Topic: US pilot moving to the UK
Replies: 12
Views: 1993

Re: US pilot moving to the UK

I had a US CPL and have since done the UK ATPL exams (twice). Your experience and knowledge will help, a bit. Be prepared for 5-10 months of intense study depending on how hard you want to attack the problem. Since you don't have "significant" experience you'll also have to do the grounds...

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by Starlionblue
Fri Jan 06, 2023 11:42 pm
Forum: Travel, Polls & Preferences
Topic: Why Was I Re-Booked? (Hawaiian Airlines)
Replies: 12
Views: 1970

Re: Why Was I Re-Booked? (Hawaiian Airlines)

Your guess sounds about right. Happens all the time. If there are disruptions the agents would rather put people on an earlier flight to free up capacity. Some airlines, e.g. SK, even offer the option of taking an earlier flight at the check-in kiosk if you're there early and there is capacity. Free...

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by Starlionblue
Fri Jan 06, 2023 11:39 pm
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

ETOPS isn't really constrained by engine reliability nowadays. It's about cargo fire suppression capability. Two conventional engines are what we have now, so I don't see why ETOPS with this concept would be more constrained. How do you propose running this thing? Shutting down the conventional eng...

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by Starlionblue
Fri Jan 06, 2023 9:55 am
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

The 787 already is a sort of hybrid aircraft, with electric batteries running systems that formerly utilized bleed air, which adds to the efficiency of the airplane. But engine reliability really isn't the limiting factor with ETOPS, as mentioned. Jet (and turboprop) engines are ridiculously reliab...

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by Starlionblue
Fri Jan 06, 2023 1:55 am
Forum: Technical/Operations
Topic: Hybrid Airliner Feasibility
Replies: 47
Views: 2571

Re: Hybrid Airliner Feasibility

ETOPS isn't really constrained by engine reliability nowadays. It's about cargo fire suppression capability. Two conventional engines are what we have now, so I don't see why ETOPS with this concept would be more constrained. How do you propose running this thing? Shutting down the conventional engi...

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by Starlionblue
Thu Jan 05, 2023 11:59 pm
Forum: Technical/Operations
Topic: Crew change when aircraft type changes
Replies: 10
Views: 2668

Re: Crew change when aircraft type changes

This sort of thing happens all the time, and not just with aircraft changes. Schedule changes such as the addition or subtraction of a daily flight and sick calls also lead to deadheading, AKA "paxing". Three basic scenarios for crew that only has to operate a return flight: - Crew deadhea...

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by Starlionblue
Thu Jan 05, 2023 9:03 am
Forum: Technical/Operations
Topic: US pilot moving to the UK
Replies: 12
Views: 1993

Re: US pilot moving to the UK

I had a US CPL and have since done the UK ATPL exams (twice). Your experience and knowledge will help, a bit. Be prepared for 5-10 months of intense study depending on how hard you want to attack the problem. Since you don't have "significant" experience you'll also have to do the groundsc...

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by Starlionblue
Tue Jan 03, 2023 11:47 pm
Forum: Technical/Operations
Topic: N1 vs EPR
Replies: 11
Views: 1881

Re: N1 vs EPR

RR used EPR on BR 700s and RB211 and related engines. A P&W engineer once told me a 1% error in takeoff EPR equals a 1% error in thrust whereas a 1% error in N1 at takeoff could equal as much as 4% error in thrust output. Having used both, sometimes both when flying two types, prefer EPR. EPR i...

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by Starlionblue
Tue Jan 03, 2023 11:41 pm
Forum: Technical/Operations
Topic: Increasing Severe and Extreme Turbulence?
Replies: 20
Views: 3824

Re: Increasing Severe and Extreme Turbulence?

I've been flying between SEA and DFW or ATL to get to LAW, TUL or OKC at least monthly for the better part of 20 years. Sometimes the flights are relatively smooth the whole way. Usually, you pick up light to moderate turbulence around the COS and Pueblo with extreme predictability, worse in the wi...

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by Starlionblue
Tue Jan 03, 2023 2:16 am
Forum: Technical/Operations
Topic: Polar Route Limitations
Replies: 29
Views: 5286

Re: Polar Route Limitations

That’s my point—you have to transit Russian airspace on polar routes, so no Russia, no polar flights to Asia. Done them many times, also Siberian flights. Erm, no, no you don't. Back to the topic. My guess is staff radiation exposure (no really). Natural radiation at the poles is 4x times greater t...

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by Starlionblue
Tue Jan 03, 2023 2:12 am
Forum: Technical/Operations
Topic: Increasing Severe and Extreme Turbulence?
Replies: 20
Views: 3824

Re: Increasing Severe and Extreme Turbulence?

I've been flying between SEA and DFW or ATL to get to LAW, TUL or OKC at least monthly for the better part of 20 years. Sometimes the flights are relatively smooth the whole way. Usually, you pick up light to moderate turbulence around the COS and Pueblo with extreme predictability, worse in the wi...

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by Starlionblue
Tue Jan 03, 2023 2:03 am
Forum: Technical/Operations
Topic: A359 pitot tubes(?) question.
Replies: 7
Views: 1798

Re: A359 pitot tubes(?) question.

Why were the SSA probes needed in the first place? I don't think any other aircraft have these probes (except for the A380). Is it used for gust suppression similarly to the gust suppression pressure transducers near the leading edge of the vertical stabilizer of the B777? They seemed to be pretty ...

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by Starlionblue
Thu Dec 29, 2022 10:31 am
Forum: Technical/Operations
Topic: CAT II/III chart with no RA height in minima block
Replies: 6
Views: 1261

Re: CAT II/III chart with no RA height in minima block

I can only speak for my own Jepp, but I see minima on the YMML ILS-Z Rwy 16 Cat II & III chart (21-1A). Cat IIIA has DA 482' and Cat II has RA 96' and DA 532. Cat IIIB has no minima, which makes sense. Surely CAT II, CAT IIIA and CAT IIIB should have RA minima indicated, as in the case of YPPH ...

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