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by Florianopolis
Thu Oct 08, 2020 6:52 pm
Forum: Technical/Operations
Topic: Simulators and Spatial Disorientation
Replies: 13
Views: 1472

Re: Simulators and Spatial Disorientation

Thank you to all for sharing your thoughts

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by Florianopolis
Mon Oct 05, 2020 3:52 am
Forum: Technical/Operations
Topic: Simulators and Spatial Disorientation
Replies: 13
Views: 1472

Simulators and Spatial Disorientation

I've been wondering about something and would like to tap into the forum's collective wisdom. TLDR: Do simulators contribute to spatial disorientation problems because they intentionally utilize our vestibular weaknesses to create illusions of flight? Every time an airline pilot goes back for a sim ...

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by Florianopolis
Sat Sep 19, 2020 3:03 am
Forum: Technical/Operations
Topic: Airbus A220 Corporate Jet?
Replies: 9
Views: 2669

Re: Airbus A220 Corporate Jet?

Airliners as bizjets, unless flown by a government, are a PITA to operate—too big, too expensive (every airport will double your charges), too burdened by regulations, esp security nowadays. That makes sense about the ground fees (although if you can afford a business jet, what's a few thousand her...

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by Florianopolis
Thu May 14, 2020 2:03 pm
Forum: Technical/Operations
Topic: Parking airliners on soft ground
Replies: 10
Views: 2385

Re: Parking airliners on soft ground

Airplanes sink into "hard" pavement all the time, too. Asphalt in particular.

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by Florianopolis
Wed Mar 25, 2020 8:37 pm
Forum: Technical/Operations
Topic: P-51 Landing Gear Doors during Startup
Replies: 5
Views: 1783

Re: P-51 Landing Gear Doors during Startup

Closing the door reduces drag, and also cleans up the airflow ahead of the radiator inlet. A cursory internet search discovers a number of forums discussing this very topic, but the consensus seems to be: Lowering the gear selector handle unlocks the mechanical door lock and it doesn't re-lock the d...

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by Florianopolis
Thu Mar 05, 2020 8:58 pm
Forum: Technical/Operations
Topic: Canadian ATC
Replies: 22
Views: 3144

Re: Canadian ATC

http://www.youtube.com/watch?v=jyO1ILQAGsU
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Can't let this go without sharing this video . . .

http://www.youtube.com/watch?v=jyO1ILQAGsU

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by Florianopolis
Thu Mar 05, 2020 8:52 pm
Forum: Technical/Operations
Topic: Wing Lights Usage at AA
Replies: 9
Views: 3467

Re: Wing Lights Usage at AA

shamrock137 wrote:
This seems to be a holdover from the L-US side of things.


I think it might even go back to being a holdover from the America West days...

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by Florianopolis
Fri Jan 24, 2020 6:19 pm
Forum: Technical/Operations
Topic: Flap & spoiler angle to wing sweep on current jet liners.
Replies: 8
Views: 1235

Re: Flap & spoiler angle to wing sweep on current jet liners.

1084506,1380700 All I can figure is so it weighs less. We're just trying to get our high-flyin', mach-busting swept wing to land at something reasonable, and these will do the job. If getting the absolutely slowest approach and landing speed was *the* most important design criteria, you'd have a st...

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by Florianopolis
Tue Jan 21, 2020 2:06 am
Forum: Civil Aviation
Topic: Interesting Data: US Flights per Day per Month Dating Back to 1987
Replies: 22
Views: 3653

Re: Interesting Data: US Flights per Day per Month Dating Back to 1987

Is this of the largest 10 airlines at the time of the data?

In other words, if Delta and Northwest merged, that's the same number of flights (ish), and then the next month it's all their flights PLUS another new tenth airline?

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by Florianopolis
Fri Jan 17, 2020 12:30 am
Forum: Technical/Operations
Topic: Instrumental Landing system
Replies: 5
Views: 1581

Re: Instrumental Landing system

I know this has been answered before, but I cannot find it on the forum, or the internet for that matter... the GS antenna has essentially 2 physical transmitters on the different frequencies to create the slope. I'm STILL not clear on while the localizer antenna has a 12-18 transmitter array by co...

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by Florianopolis
Sat Jun 01, 2019 11:01 pm
Forum: Technical/Operations
Topic: Can a lesser-range airplane be reconfigured to get ULH?
Replies: 13
Views: 1758

Re: Can a lesser-range airplane be reconfigured to get ULH?

I've always heard a KC-10 can go for a while.

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by Florianopolis
Sun May 26, 2019 11:40 pm
Forum: Technical/Operations
Topic: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?
Replies: 22
Views: 4974

Re: What is the dynamics or reason behind the turboprops rotating blades in opposite directions?

Have we considered the possibility that they know it works, but don't know how ? When developing another quad-engine turboprop with very powerful engines, Lockheed had such a hard time getting their arms wrapped around stall on the C-130J that they just gave up and installed a stick-pusher. http://w...

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by Florianopolis
Tue Mar 12, 2019 1:04 am
Forum: Technical/Operations
Topic: Redundancy of sensors
Replies: 4
Views: 681

Re: Redundancy of sensors

Your post is actually a topic for a PhD thesis. Several, actually. Human-machine flight control and failure modes and redundancy is big stuff. If I understood it correctly FBW just replaces mechanics with electronics and is not related to the sensor redundancy. I just want to make sure we're on the ...

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by Florianopolis
Fri Feb 15, 2019 12:56 am
Forum: Technical/Operations
Topic: sterile cockpit - high altitude airports question
Replies: 24
Views: 3366

Re: sterile cockpit - high altitude airports question

The only African airline I'm familiar with (hubbed at JNB, elev 5,500) set their sterile cockpit at 15,000

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by Florianopolis
Sun Feb 03, 2019 12:27 am
Forum: Technical/Operations
Topic: Altimeter indicated altitude vs aircraft speed,bernoulli
Replies: 27
Views: 2968

Re: Altimeter indicated altitude vs aircraft speed,bernoulli

Angle of attack, sideslip, airspeed, configuration, ground effect, dynamic maneuvers . . . it all screws it up. https://apps.dtic.mil/dtic/tr/fulltext/u2/a280006.pdf (go to page 61) http://www.nasa.gov/centers/dryden/pdf/88377main_H-2044.pdf If those don't help, one of the references at the back will.

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by Florianopolis
Sun Nov 18, 2018 1:25 am
Forum: Technical/Operations
Topic: Sea Planes with retractable floats?
Replies: 6
Views: 2387

Re: Sea Planes with retractable floats?

Here's one, although it didn't float on the skis, so I guess it's more of a supersonic flying boat with retractable steps?

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by Florianopolis
Mon Nov 05, 2018 2:31 am
Forum: Technical/Operations
Topic: Crosswind Landing Technique
Replies: 11
Views: 3186

Re: Crosswind Landing Technique

You may find this interesting. http://skybrary.aero/bookshelf/books/179.pdf The gist is that crabbing until flare and then swinging it out with rudder and a bit of roll into the wind gives you the best combination of reduced loads and smallest risk of banging something important into the ground (737...

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by Florianopolis
Mon Nov 05, 2018 2:07 am
Forum: Technical/Operations
Topic: 747 APU in-flight
Replies: 12
Views: 3298

Re: 747 APU in-flight

I thought it was because four windmilling engines will provide enough hydraulics to keep flying, and the batteries are big enough to run electrics until you 1) restart an engine, or 2) reach the ground. The -8 added a RAT (for hydraulics only, I think) because windmilling its engines wouldn't keep t...

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by Florianopolis
Wed Oct 03, 2018 6:49 pm
Forum: Technical/Operations
Topic: B757 Wingtip Types
Replies: 8
Views: 2450

Re: B757 Wingtip Types

Same idea on a 737:


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by Florianopolis
Wed Sep 26, 2018 7:36 pm
Forum: Technical/Operations
Topic: What is this thing in the 747 cockpit?
Replies: 25
Views: 4561

Re: What is this thing in the 747 cockpit?

The C-17 has something like this well. theres a clear cylinder attached to the windshield divider. There is a dot on the outside and in the center there is some cross hairs. You just adjust the seat until it lines up. This was important especially with the HUD as it can affect how the data was seen...

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by Florianopolis
Sat Sep 22, 2018 7:46 pm
Forum: Technical/Operations
Topic: CN-235 Armrest Buttons
Replies: 1
Views: 690

CN-235 Armrest Buttons

Anybody know what these armrest buttons do? Seat heaters?

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by Florianopolis
Wed Sep 19, 2018 7:32 pm
Forum: Technical/Operations
Topic: Localizer when no room for antenna?
Replies: 7
Views: 1537

Re: Localizer when no room for antenna?

The most interesting use for a localizer that I've seen is in the missed approach procedure for the VOR/DME-C approach at Aspen (http://155.178.201.160/d-tpp/1810/05889LDE.PDF). This puts the actual localizer array somewhere in the skiing slopes. That is wild! http://image.ibb.co/jaG36e/Capture.jpg...

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by Florianopolis
Sat Sep 08, 2018 4:17 am
Forum: Technical/Operations
Topic: Localizer when no room for antenna?
Replies: 7
Views: 1537

Re: Localizer when no room for antenna?

Yeah, the Localizer looks like the little guy by taxiway S. It's not as wide as what you'd normally see (which I think makes it a little less precise, if I'm remembering my antenna aperture theory). Because it's not on the runway center-line, it's cranked a little bit to get the signal to extend ove...

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by Florianopolis
Tue Sep 04, 2018 4:49 pm
Forum: Technical/Operations
Topic: 767-2C lower ceiling than other 767?
Replies: 10
Views: 2083

Re: 767-2C lower ceiling than other 767?

Doesn't it have the wing of the -300 and the short fuselage of the -200? Is the -300's wing bigger? Maybe it won't descend to a safe altitude as quickly with a big wing, so you can't be as high when you start?

It could probably go much higher, but it's the requirement to get down that restricts it.

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by Florianopolis
Mon Sep 03, 2018 9:15 pm
Forum: Technical/Operations
Topic: Any aircraft with similar STOL characteristics and passenger capacity as the An-72
Replies: 27
Views: 2542

Re: Any aircraft with similar STOL characteristics and passenger capacity as the An-72

NASA put jets on a deHavilland C-8A Buffalo...but that's substantially smaller than the An-72. (Google "NASA QSRA" if you're interested) http://upload.wikimedia.org/wikipedia/commons/8/8f/NASA_QSRA.jpg Even flew it off an aircraft carrier! http://www.youtube.com/watch?v=k_eDutgh4IU For som...

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by Florianopolis
Sun Sep 02, 2018 5:33 pm
Forum: Technical/Operations
Topic: AN-12 Cargo Aircraft Crew?
Replies: 15
Views: 2312

Re: AN-12 Cargo Aircraft Crew?

727200 wrote:
Is that the socialistic view of giving people a job? He only steers the plane? I wont even comment on the lack of efficiency on this.


Tough union contracts.

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by Florianopolis
Fri Aug 31, 2018 11:23 pm
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 2082

Re: Why Anhedral with fly by wire?

Fact is the high wing cargo planes have an anhedral because the CG is much lower than the lift vector. With a CG below the wing you inherently gain better roll stability. Think of a pendulum. It wants to return back to its normal resting state. An anhedral wing reduces this some by introducing more...

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by Florianopolis
Sat Aug 25, 2018 10:45 pm
Forum: Technical/Operations
Topic: Couple of go-around questions
Replies: 28
Views: 4069

Re: Couple of go-around questions

The airplane might also drop a dime on you if you should have gone around, but did not.

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by Florianopolis
Wed Aug 15, 2018 3:09 am
Forum: Technical/Operations
Topic: 767 crosswind T/O and Landing
Replies: 6
Views: 1458

Re: 767 crosswind T/O and Landing

Starlionblue wrote:

The standard arrangement seems to be that the VOR receivers live in the top of the fin, while the LOC and G/S receivers live in the lower part of the nose.


Wow that's a lot of pictures. Thanks!

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by Florianopolis
Tue Aug 14, 2018 5:59 pm
Forum: Technical/Operations
Topic: 767 crosswind T/O and Landing
Replies: 6
Views: 1458

Re: 767 crosswind T/O and Landing

Does the localizer / VOR antenna live in the nose or tail?

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by Florianopolis
Fri Aug 10, 2018 6:00 pm
Forum: Technical/Operations
Topic: V1 question
Replies: 18
Views: 1935

Re: V1 question

http://www.ntsb.gov/_layouts/ntsb.aviat ... 081&akey=1
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kalvado wrote:
But don't try that with a jet...


Sometimes they do...
http://www.ntsb.gov/_layouts/ntsb.aviat ... 081&akey=1

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by Florianopolis
Mon Jul 30, 2018 9:11 pm
Forum: Technical/Operations
Topic: Packs and Supplementary Air Supplies
Replies: 13
Views: 1058

Re: Packs and Supplementary Air Supplies

Is this hooked up to the HP engine start air source, and routed to the pacs instead of to the engine starter? Or is there a separate HP air hookup for PAC feed air, in addition to the fat yellow hoses that hookup air conditioned air right to the distribution system downstream of the PACs?

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by Florianopolis
Fri Jul 13, 2018 10:27 pm
Forum: Technical/Operations
Topic: A330 Nose Landing Gear
Replies: 4
Views: 1265

Re: A330 Nose Landing Gear

I have guesses, in decreasing confidence order: 1) When retracting the gear with a shredded tire, the spinning tire bits will hit those bars as the gear retracts, reducing damage to all the stuff in the wheel well. 2) A maintenance jig or something hangs on it. Or it's part of the nose gear position...

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by Florianopolis
Fri Jul 06, 2018 11:06 pm
Forum: Technical/Operations
Topic: P-8 Poseidon raked wingtip
Replies: 15
Views: 2893

Re: P-8 Poseidon raked wingtip

Anti-icing on your typical 737NG ends at the penultimate slat section. That's okay for an airliner, which doesn't spend much time in icing conditions. Airliners live at cruise altitudes, and are only going through icing for a minute or two on their way up and down. But a maritime patrol airplane wi...

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by Florianopolis
Fri Jul 06, 2018 5:01 pm
Forum: Technical/Operations
Topic: P-8 Poseidon raked wingtip
Replies: 15
Views: 2893

Re: P-8 Poseidon raked wingtip

Anti-icing on your typical 737NG ends at the penultimate slat section. That's okay for an airliner, which doesn't spend much time in icing conditions. Airliners live at cruise altitudes, and are only going through icing for a minute or two on their way up and down. But a maritime patrol airplane wil...

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by Florianopolis
Fri Jul 06, 2018 6:17 am
Forum: Civil Aviation
Topic: Aeroflot TU-104 next to UA DC-7: where?
Replies: 10
Views: 3355

Re: Aeroflot TU-104 next to UA DC-7: where?

I'm going with the 1958 Vancouver Airshow . http://basininstitute.org/home/image.html?zn=7&id=8911b43f97f9e9d0c5f524d24c75f634 http://basininstitute.org/search/details.html?id=58254 Here's a fun story about that airshow: http://www.henrytenby.com/aeroflot-tu-104-visit-to-vancouver-airshow-sunday...

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by Florianopolis
Sun Jul 01, 2018 2:55 am
Forum: Technical/Operations
Topic: Boeings and Krueger/VCFs (diagram pics)
Replies: 14
Views: 2090

Re: Boeings and Krueger/VCFs (diagram pics)

Another thing to consider, without going too off topic - you'd prefer a swept wing to stall at the root first, and you'll see lots of design nuances to help that happen. On the A380, for example, the leading edge devices between the fuselage and inboard engine have no gap, they just droop.

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by Florianopolis
Sun Jun 24, 2018 1:39 am
Forum: Technical/Operations
Topic: What makes the engine physically go faster?
Replies: 17
Views: 1946

Re: What makes the engine physically go faster?

lightsaber wrote:
Going from flight idle to full throttle does many takeoffs of damage to the engine to accelerate the availability of thrust.


Is a go-around worse for the engine than a takeoff?

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by Florianopolis
Sat Jun 23, 2018 3:34 pm
Forum: Technical/Operations
Topic: Typical pre-delivery squawks
Replies: 15
Views: 2152

Re: Typical pre-delivery squawks

7BOEING7 wrote:
The Boeing factories in Renton (727,737,757) & Everett (747,767,777,787) generally get it right 99%+ of the time


Hold on. So you're saying Kansas and South Carolina aren't as good?

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by Florianopolis
Thu Jun 21, 2018 10:38 pm
Forum: Technical/Operations
Topic: 1938 Boston Airport Operations
Replies: 5
Views: 877

Re: 1938 Boston Airport Operations

double post....
...

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by Florianopolis
Thu Jun 21, 2018 10:37 pm
Forum: Technical/Operations
Topic: 1938 Boston Airport Operations
Replies: 5
Views: 877

Re: 1938 Boston Airport Operations

It's not grass, but cinder, piled up on the marshland and tidal flats to create a usable airfield. Actual runways weren't really a thing for the first 40 years of aviation. Airplanes weren't heavy enough to need pavement, and you always wanted to takeoff and land into the wind. Here's a picture of t...

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by Florianopolis
Tue Jun 19, 2018 3:08 am
Forum: Technical/Operations
Topic: What happens with international delayed checked baggage?
Replies: 16
Views: 2819

Re: What happens with international delayed checked baggage?

x1234 wrote:
It will still travel to its final destination correct!?


The bag will catch up to you, eventually. But depending on where it sits while it waits to catch up to you, the odds of anything valuable in the bag still being in it when you get it go down dramatically.

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by Florianopolis
Wed Jun 13, 2018 4:28 pm
Forum: Technical/Operations
Topic: Is fewer fan blades better?
Replies: 18
Views: 2911

Re: Is fewer fan blades better?

Balerit wrote:
Just look at how the aspect ratio has changed.


Isn't a high-aspect airfoil better, though?

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by Florianopolis
Tue Jun 12, 2018 7:43 pm
Forum: Technical/Operations
Topic: Is fewer fan blades better?
Replies: 18
Views: 2911

Re: Is fewer fan blades better?

But turboprops have been sprouting more propellers?

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by Florianopolis
Mon Jun 04, 2018 5:02 pm
Forum: Technical/Operations
Topic: Would a large prop plane designed today look the same?
Replies: 21
Views: 4163

Re: Would a large prop plane designed today look the same?

I live near ANC, which may well be one of the best places in the world for plane-spotting. We still fly DC-6 aircraft up here, along with a few Grummans, and there are a host of airframes within easy driving distances stretching from the C-119 to a AN-2 being restored. Looking at all these old prop...

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by Florianopolis
Sun May 13, 2018 4:39 am
Forum: Technical/Operations
Topic: "Heavy" designation for enroute aircraft
Replies: 10
Views: 2861

Re: "Heavy" designation for enroute aircraft

I watched Air Force One land and had Live ATC going. They actually did use "Air Force One heavy" as the call sign; it was the VC-25. I'm assuming you mean the controller, not the A1 pilots? I'm pretty sure the "no "heavy" for AF1" rule happened because hearing "Ai...

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by Florianopolis
Thu May 10, 2018 4:08 pm
Forum: Technical/Operations
Topic: Maneuvering Speed
Replies: 7
Views: 1494

Re: Maneuvering Speed

I think the replies all get it, but everyone's saying it differently. Pull back on your controls when you're flying below Maneuvering Speed, and the airplane stalls before the wings rip off. But Va makes no promises about any other parts of the airplane, or for maneuvers in more dimensions. See if t...

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