Search found 599 matches

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by SAAFNAV
Sun Jun 21, 2020 8:12 am
Forum: Technical/Operations
Topic: Celestial Nav - Sextant Ports
Replies: 16
Views: 1864

Re: Celestial Nav - Sextant Ports

As an ex-navigator, I missed out on celestial nav as it was retired long before I started training. It always fascinated me, but I must say, if I still had to do that in the nav course it might have gotten pretty hard. Our C-130's still carries the sextant. It isn't serviced/calibrated anymore, but ...

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by SAAFNAV
Tue May 12, 2020 7:58 am
Forum: Technical/Operations
Topic: Why do aviation safety agencies overlook obvious safety deficiencies ?
Replies: 60
Views: 8779

Re: Why do aviation safety agencies overlook obvious safety deficiencies ?

Ok so got some more ideas/questions which I'd like to know why they were/are not implemented in aviation industry. 1) Why don't aircraft cockpits have a big-size "Level-Checking-Vial" like the one used in level-measurement-tools ? Those bottles with green color liquid that move based on g...

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by SAAFNAV
Sat May 09, 2020 6:38 am
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3195

Re: 747-400 horizontal stabilizer tank question

Ok let's try one more time: Suppose you have a car with a trunk/boot. Suppose you look at the trunk and think 'hey, let's seal this sucker up, so I can have a long range tank'. So you use a lot of sealant, you add one pipe and maybe a pump. Then someone comes around and keeps asking what does the ta...

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by SAAFNAV
Wed May 06, 2020 4:28 pm
Forum: Technical/Operations
Topic: 747-400 horizontal stabilizer tank question
Replies: 22
Views: 3195

Re: 747-400 horizontal stabilizer tank question

The added weight will be the weight of the installed sealant. Do you have any pictures of the sealant? It is probably just aviation-grade petroleum resistant compound, to seal all the joints. Just think of very expensive caulking, like for a bathroom. Thick, nasty black stuff. People can't really g...

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by SAAFNAV
Tue May 05, 2020 1:17 pm
Forum: Technical/Operations
Topic: Ship a freezer by air?
Replies: 16
Views: 2389

Re: Ship a freezer by air?

This 12kg exemption seems to be only for Ground shipments. I don't know if there's another exemption for air though. Someone at FedEx told me about a 100g exemption, then another said that, no, freezers don't ship at all by air. I think no one really knows at FedEx. Maybe @SAAFNAV could enlighten u...

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by SAAFNAV
Mon May 04, 2020 12:28 pm
Forum: Technical/Operations
Topic: Ship a freezer by air?
Replies: 16
Views: 2389

Re: Ship a freezer by air?

We ship aircons and freezers/fridges all the time. Never heard of problems. Considering the pressures they are operating under normal operation, the extra bit from cabin alt is hardly likely to damage it. Talking from the top of my head, as I don't have access to the ICAO DG manual, but freezers nor...

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by SAAFNAV
Thu Apr 23, 2020 2:33 pm
Forum: Travel, Polls & Preferences
Topic: Transferring to Germany
Replies: 2
Views: 676

Transferring to Germany

Hi all,

So I'm interested in moving to Germany.
My girlfriend is a citizen, but lives in South Africa. Seems it's a bit harder to get residency that I thought.

Anyone else here who went through similar experiences who could assist me?

Thanks in advance.

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by SAAFNAV
Wed Apr 22, 2020 8:24 am
Forum: Technical/Operations
Topic: Throttle/Thrust Settings, How's It Work?
Replies: 12
Views: 1589

Re: Throttle/Thrust Settings, How's It Work?

The OP does seem to have some misconceptions about flying. Have a look at the famous book by D.P. Davies 'Handling the Big Jets: An Explanation of the Significant Difference in Flying Qualities Between Jet Transport Aeroplanes and Piston Engined Transport Aircraft' If you're familiar with the intern...

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by SAAFNAV
Fri Apr 03, 2020 7:27 am
Forum: Technical/Operations
Topic: Using passenger aircraft as freighters during this crisis
Replies: 20
Views: 4212

Re: Using passenger aircraft as freighters during this crisis

https://www.flightglobal.com/air-transp ... 72.article
-->

Then there is this STC that is being fast-tracked.
Ideal for large volume low weight, like boxes of masks.

https://www.flightglobal.com/air-transp ... 72.article

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by SAAFNAV
Fri Mar 06, 2020 1:47 pm
Forum: Technical/Operations
Topic: Galley / Lavatory Pitch Problems
Replies: 11
Views: 2607

Re: Galley / Lavatory Pitch Problems

Layout of Passenger Accommodation or Aircraft Interior Configuration Document. The layout of all the furnishings in the cabin, including the seats and emergency equipment. Everything on there must also be physically present in the cabin, so cabin crew can use the quantities as a check of equipment a...

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by SAAFNAV
Fri Feb 14, 2020 2:25 pm
Forum: Technical/Operations
Topic: CPT - Alternate/Diversion Airport Question
Replies: 20
Views: 1960

Re: CPT - Alternate/Diversion Airport Question

Cape Town only has CatII equipment. Cat 3B equipment, they only publish a Cat 2 chart. Individual airlines need to obtain their own LVO approvals for each state they fly into. When flying the Cat3B approach you would use the Cat 1 chart and the decision height (not the MDA on the chart) that the ai...

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by SAAFNAV
Fri Feb 14, 2020 7:29 am
Forum: Technical/Operations
Topic: CPT - Alternate/Diversion Airport Question
Replies: 20
Views: 1960

Re: CPT - Alternate/Diversion Airport Question

An important airport like CPT has CAT IIIB capability, so the airlines aren't going to have a problem. Additionally, the weather there is rather good most of the year, so you aren't necessarily going to be seeing super low ceilings. There are more options that open up for GA, because they don't nec...

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by SAAFNAV
Sun Feb 09, 2020 1:11 pm
Forum: Technical/Operations
Topic: Turbofan Engine
Replies: 25
Views: 2797

Re: Turbofan Engine

Interesting replies. I must confess, I had to drag my dictionary closer, but maybe my South African English dropped me a bit. For sure, the terms arrogant and abrasive have different meanings. Nowhere did I resort to name-calling, or doubting the poster's intellect or anything that would put me on a...

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by SAAFNAV
Sat Feb 01, 2020 4:44 pm
Forum: Technical/Operations
Topic: Turbofan Engine
Replies: 25
Views: 2797

Re: Turbofan Engine

As an engineer, a big part of your job would be sit and think and come up with a solution to a problem. Not ask people to do your homework. If you got into aircraft and space engineering without ever reading about how a basic jet engine or rocket works, I'm not too sure about the caliber of either t...

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by SAAFNAV
Sat Feb 01, 2020 1:02 pm
Forum: Technical/Operations
Topic: How to identify the length of a runway?
Replies: 19
Views: 2088

Re: How to identify the length of a runway?

I read an interesting anecdote about a captain of the USS New Jersey who had previously been a destroyer skipper: he ordered the anchor dropped when they were still in motion, thinking the ship was going to coast to a stop. Sure enough, they threw the engines in full reverse when the yellow links c...

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by SAAFNAV
Thu Jan 30, 2020 2:45 pm
Forum: Technical/Operations
Topic: N705CK Evacuation
Replies: 27
Views: 3639

Re: N705CK Evacuation

Wonder how the pax oxygen might work? I have never seen this in the 747 much less any other ac. I suppose you could just keep the cruise alt below FL250 and perhaps that was another reason for the PANC technical stop?? We carry pax on our L-382's. Seats are on pallets, and underneath each seat ther...

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by SAAFNAV
Thu Jan 23, 2020 8:08 pm
Forum: Technical/Operations
Topic: Pressurization of transport/cargo aircraft with ramps
Replies: 22
Views: 1990

Re: Pressurization of transport/cargo aircraft with ramps

] After some intermittent data drop-outs (aka funny business) it displayed a steady track over Marseille, allegedly climbing back to FL290, eventually reaching FL320 before disappearing into the black hole that is Algerian airspace (i.e. very limited FR24 coverage). But I also have my doubts.... If...

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by SAAFNAV
Thu Jan 23, 2020 12:59 pm
Forum: Technical/Operations
Topic: Pressurization of transport/cargo aircraft with ramps
Replies: 22
Views: 1990

Re: Pressurization of transport/cargo aircraft with ramps

There is a recent thread on a.net on cargo planes, but I can't find it with a quick look. The rear ramp has gaskets including some air filled ones that perform the seal, however the size of the doors is huge. The leakage at the seals limited the altitude difference between the cabin and outside to ...

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by SAAFNAV
Tue Jan 14, 2020 7:02 am
Forum: Technical/Operations
Topic: Future VLA Market?
Replies: 91
Views: 5117

Re: Future VLA Market?

Uh, no, the part that produces (most of the) drag is the cross-section, not surface area, and the cross section is about 35% larger than the 777X, not to mention the wings' cross section also matters here. Also, the wider fuselage also produces more lift from below as well, especially if it's ovoid...

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by SAAFNAV
Thu Dec 19, 2019 7:47 am
Forum: Technical/Operations
Topic: How much power is needed for pressurization?
Replies: 40
Views: 3263

Re: How much power is needed for pressurization?

How did piston powered aircraft like the DC-7 or L1049 do pressurization? they carried engine driven compressors on the engine Accessory Gearbox. The Lockheed L188, the C130 and the CV580 that I know of all carried them. Though they're not the only method, Only the one's I've actually worked on. I'...

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by SAAFNAV
Fri Dec 06, 2019 8:27 am
Forum: Technical/Operations
Topic: The math behind twins.
Replies: 36
Views: 4309

Re: The math behind twins.

Woodreau wrote:
Topside deck watches were a little easier, 4 on, 8 off or 5 on, 10 off plus the dog watches.


I'm sorry, but I have to derail further with a Patrick O'Brien quote: Why are they called dog watches? Because they are cur-tailed.

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by SAAFNAV
Sun Nov 24, 2019 6:27 am
Forum: Technical/Operations
Topic: Crew overnighting in hotels question.
Replies: 16
Views: 2266

Re: Crew overnighting in hotels question.

Subcontracting for the UN, they have a policy the captain having a room to himself, and the rest must share. Luckily our company policy forbids it, so on an RON the company picks up the tab for the extra room. But when you break down in the Somali desert and have to stay at the camp, you'd end up sh...

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by SAAFNAV
Thu Nov 21, 2019 3:39 pm
Forum: Technical/Operations
Topic: Looking for B1900 D Operators
Replies: 3
Views: 669

Re: Looking for B1900 D Operators

How do we know what operators you already know about?

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by SAAFNAV
Tue Oct 29, 2019 12:55 pm
Forum: Technical/Operations
Topic: Breath Analyser testing for Airside personnell
Replies: 28
Views: 10798

Re: Breath Analyser testing for Airside personnell

Oh don't mind the OP.

The internet goes on every 4 months or so in India, and he takes the opportunity to add an already answered answer to every thread, and add a few new ones.

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by SAAFNAV
Tue Oct 29, 2019 12:54 pm
Forum: Technical/Operations
Topic: Why are turboprops so named ?
Replies: 56
Views: 9228

Re: Why are turboprops so named ?

This seems to me a North American thing, with a relatively simple written exam, and just one exam. In EASA, Australia, South Africa and other places, the fourteen-ish CPL/ATPL exams take at least 6 months of full-time study to prepare for, including proper ground school. Having just written the Sou...

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by SAAFNAV
Wed Oct 02, 2019 6:52 am
Forum: Technical/Operations
Topic: Japan Cabin Light Rules
Replies: 5
Views: 3149

Re: Japan Cabin Light Rules

. But there's an equally valid school of thought that says if there's an aborted takeoff requiring evacuation or something to that effect, it's better to have the cabin already lit to facilitate evacuation. When everybody needs to be out of the plane within 90 seconds, wasting 5-10 of those seconds...

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by SAAFNAV
Wed Sep 04, 2019 7:28 am
Forum: Technical/Operations
Topic: Scenario Question: Unstable Approach
Replies: 19
Views: 2740

Re: Scenario Question: Unstable Approach

If it is an Airbus aircraft, then the first step I would do is the same. But for an Airbus, if the Captain is pressing on the priority button on his sidestick, it would be impossible for the PM then to take over as PF, wouldn't it? What would one do in this case? In this unlikely scenario, as a las...

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by SAAFNAV
Mon Aug 26, 2019 4:27 pm
Forum: Civil Aviation
Topic: C-130 Crash at (SBA) Santa Barbara Airport, CA
Replies: 19
Views: 9079

Re: C-130 Crash at (SBA) Santa Barbara Airport, CA

That'll buff out. Nah, it's a write off. Guys, serious question, could a write-off buff out? And what about Tuesday? Probably no serious damage. Appears that only right-hand side main landing gear got either stuck up, or not fully engage in the down position and 'split out' to the side. (Needs to b...

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by SAAFNAV
Mon Aug 26, 2019 4:11 pm
Forum: Civil Aviation
Topic: Hungarian government tries to buy back BUD due to mismanagement
Replies: 17
Views: 3211

Re: HU government tries to buy back BUD due to mismanagement

Who would think it was Hainan government? And why you they buy back a Hungarian airport they never owned? It's about the bigger principle: Aviation uses standardised codes, and you didn't. Whilst you might figure it out from context, it is unneeded when there are already acceptable codes. Actually ...

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by SAAFNAV
Mon Aug 26, 2019 8:49 am
Forum: Civil Aviation
Topic: Hungarian government tries to buy back BUD due to mismanagement
Replies: 17
Views: 3211

Re: HU government tries to buy back BUD due to mismanagement

To avoid confusion I think the thread title should read "Hungarian" instead of HU since HU is the IATA code for Hainan Airlines. Who would think it was Hainan government? And why you they buy back a Hungarian airport they never owned? It's about the bigger principle: Aviation uses standar...

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by SAAFNAV
Sat Aug 24, 2019 5:43 am
Forum: Technical/Operations
Topic: The Tristar automated descent control system
Replies: 41
Views: 5059

Re: The Tristar automated descent control system

So, OP, let me get this straight: You come on here to ask questions, then you start teaching some actual pilots, some of them who also flew the L-1011, about how it works. Your comments actually shows that you have no idea how the systems work, or are integrated to create an autoland system (hint: y...

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by SAAFNAV
Tue Aug 20, 2019 6:28 am
Forum: Technical/Operations
Topic: Full brakes or rudder
Replies: 23
Views: 3780

Re: Full brakes or rudder

CFI at my flying club has the mantra “Do what you need to do” ie take positive action (which can also be positively doing nothing) in all situations to maintain control of the aircraft. If you’re Landing with a crosswind and you are getting steered by the wind after touchdown by all means use some ...

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by SAAFNAV
Wed Aug 07, 2019 3:07 pm
Forum: Travel, Polls & Preferences
Topic: Good cities for a start up airline in 2019
Replies: 12
Views: 1102

Re: Good cities for a start up airline in 2019

Hmmm, how about Salt Lake City and Dar es Salaam, and Vladivostok and Easter Island.
Purely hypothetical of course.
But for best results use a dart and a map and throw blindfolded.

As long as you have a re-engined B757 flying fish, you'd be fine.

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by SAAFNAV
Sun Jul 28, 2019 8:03 pm
Forum: Technical/Operations
Topic: Can Qatari planes divert to airports in blockaded countries?
Replies: 16
Views: 5907

Re: Can Qatari planes divert to airports in blockaded countries?

I know this is A.net where everything is made up and the points don't matter, but can we please get our terminology right?

Bahrain, Emirates and Saudi isn't blockaded, Qatar is.

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by SAAFNAV
Sun Jul 21, 2019 3:22 pm
Forum: Travel, Polls & Preferences
Topic: Why was there an innovation drought during the 1990's and 2000's?
Replies: 14
Views: 2515

Re: Why was there an innovation drought during the 1990's and 2000's?

People seem not to understand that this 1989 chap is that rare bird on a.net, a 100% troll account. His posts are solely aimed at getting bites, not at initiating any serious discussion. While he sure is a troll, I seem to be getting the ideal that he just doesn't suffer from troll syndrome, but th...

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by SAAFNAV
Thu Jul 11, 2019 7:29 am
Forum: Technical/Operations
Topic: Mandate fly-by-wire for transport class aircraft through Part 25 regulation?
Replies: 9
Views: 2257

Re: Mandate fly-by-wire for transport class aircraft through Part 25 regulation?

Reason is FBW architecture offers envelope protection. Yes the current non-FBW models Are safe, but FBW will enhance safety. The technology for FBW is readily available and mature, hence there is no execuse for not making aviation safer And yet you still have pilots crashing fully FBW aircraft. Env...

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by SAAFNAV
Thu Jun 20, 2019 9:19 am
Forum: Civil Aviation
Topic: Delta 1316 Diverted and Delayed
Replies: 35
Views: 4113

Re: Delta 1316 Diverted and Delayed

Why the deep emotional involvement if you weren't on the flight.

Stuff happens, things must go on. Kinda sad that you have to monitor all this, and have to create threads about delayed flights.

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by SAAFNAV
Wed Jun 19, 2019 5:09 am
Forum: Technical/Operations
Topic: Why can’t aircraft maximize fuselage space by using ceiling space?
Replies: 35
Views: 5634

Re: Why can’t aircraft maximize fuselage space by using ceiling space?

Dear Airbus, Boeing, Gentlemen, Here is the answer: make a square fuselage, à la Shorts 360. No lost spaces, although a little sensitivity to cross winds, I presume. https://www.airliners.net/photo/Untitled/Short-330-200/2208407?qsp=eJwtjEEKwkAMRa8iWbtQCl10pxfQhRcIk48tVmdIAjqU3r3p4O7x/uctlPLH8fNHLa...

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by SAAFNAV
Sat Jun 08, 2019 6:12 am
Forum: Technical/Operations
Topic: CAA - Part 66 Exam
Replies: 1
Views: 832

Re: CAA - Part 66 Exam

What country?

Maybe contact the exam department of your CAA and ask them.

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by SAAFNAV
Thu Jun 06, 2019 10:24 am
Forum: Civil Aviation
Topic: Media: AA refuses to supply IG with a spare part causing delays in SFO
Replies: 111
Views: 26255

Re: Media: AA refuses to supply IG with a spare part causing delays in SFO

If AA had a good reason to refuse to supply the spare part, I would like to know it. Unless you work for AA, you have no reason for you being allowed to know it. Otherwise I think this decision was stupid at a level of business because AA had the opportunity to earn a fair price selling a spare par...

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by SAAFNAV
Thu Jun 06, 2019 10:16 am
Forum: Technical/Operations
Topic: Bleed AIr Off the Low Pressure Compressor?
Replies: 17
Views: 3953

Re: Bleed AIr Off the Low Pressure Compressor?

I guess the question is then why would one need power input to the packs? What work would have to be injected into the HP bleed air if what you are looking to do is reduce its energy per unit volume? That is, reduce both the temperature and pressure. Overall, the packs are taking energy out of the ...

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by SAAFNAV
Mon Jun 03, 2019 6:11 pm
Forum: Technical/Operations
Topic: How easy is it to start a regional/commuter airline?
Replies: 19
Views: 3339

Re: How easy is it to start a regional/commuter airline?

It isn’t easy either way but you’ll get a big difference depending on if you decide to operate under part 121 or part 135 here in the states. It may be helpful if you explain what the differences are. https://www.law.cornell.edu/cfr/text/14/part-121 vs https://www.law.cornell.edu/cfr/text/14/part-1...

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by SAAFNAV
Thu May 30, 2019 6:59 am
Forum: Civil Aviation
Topic: ET901 ADD to LOS making a touch and go due to bad weather
Replies: 47
Views: 10315

Re: An Ethiopian Airlines flight did a go around, and this is what happened

I thought I opened A.net, but then I saw a Buzzfeed title instead.

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by SAAFNAV
Mon May 27, 2019 3:42 pm
Forum: Technical/Operations
Topic: SQ A359 MTOWs.
Replies: 19
Views: 2558

Re: SQ A359 MTOWs.

Wow so many emojis.
I think most people here understand the term Boeing without their logo needed to be added. Let's not go back to hieroglyphics.

But thanks for the good data.

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by SAAFNAV
Wed May 22, 2019 7:22 am
Forum: Technical/Operations
Topic: Runway light intensity
Replies: 4
Views: 1770

Re: Runway light intensity

If you fly during a clear night and turn the lights to max on an instrument runway, it will be unbearably bright and blinding.
At my home airfield we used to ask for 10%, which was their lowest setting, but even lower would've been great.

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by SAAFNAV
Tue May 14, 2019 6:24 pm
Forum: Technical/Operations
Topic: Thinking about getting a license. But is it right for me?
Replies: 13
Views: 2317

Re: Thinking about getting a license. But is it right for me?

You ask if the license is right for you, but you don't specify what you want to use it for?

If you want to become a professional pilot, then go do it.

If you purely want to fly for the love of it, consider another type of flying: recreational (sports), glider, paragliding etc.

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by SAAFNAV
Mon May 13, 2019 3:32 pm
Forum: Technical/Operations
Topic: Closing and Opening of Aircraft Doors
Replies: 14
Views: 3625

Re: Closing and Opening of Aircraft Doors

I can't speak for this video, but in my country the training for flight attendants is absolutely based on the lowest common denominator, i.e. IQ of 30. You have to recite the stuff word for word, with no thinking allowed. When we do the fire drill, you have to actually make a 'pssst' noise when you ...

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by SAAFNAV
Thu May 09, 2019 3:02 pm
Forum: Technical/Operations
Topic: Boeing Modes vs Airbus Laws
Replies: 32
Views: 5103

Re: How FBW is the B787?

There's no new way to define FBW. You may define it as you may want to, but regardless as to how you want it to be, FBW will always be defined as the driving of flight control surfaces without a direct link to the control inputs. Whether it is by fibre optics, copper cables etc, if your input goes i...

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by SAAFNAV
Tue Apr 30, 2019 1:47 pm
Forum: Technical/Operations
Topic: Eyebrow windows
Replies: 56
Views: 6332

Re: Eyebrow windows

Thanks, realized the D cell piece was a joke, I was mainly wondering how noisy the hole would be when open. The galley drains are loud enough, a hole an inch in diameter would be much louder, I'd think. Our C-130's still had the port, and we carried the sextants still. Not for celestial navigation,...

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by SAAFNAV
Tue Apr 30, 2019 1:41 pm
Forum: Technical/Operations
Topic: AI completes dispatch with no alternate destination B787 flight
Replies: 42
Views: 6622

Re: AI completes despatch with no alternate destination B787 flight

This flight was specially planned in coordination with ATC and regulators to ensure nothing weird happens Wow what a great idea! Instead of studying emergency procedures, single-engine flight and forced landing, next time I'll just phone my local ATC and tell him I plan no emergencies for this flig...

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