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by Florianopolis
Tue Jun 07, 2022 10:14 pm
Forum: Technical/Operations
Topic: Boeing 737-100 "excessively cruciform" meaning?
Replies: 7
Views: 2370

Re: Boeing 737-100 "excessively cruciform" meaning?

Guys, couldn't he just be saying that the airplane was "cross", like it flew like it was in a bad mood ?

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by Florianopolis
Sat May 28, 2022 1:31 am
Forum: Technical/Operations
Topic: Is an Aircraft Perfectly Balanced 50/50?
Replies: 17
Views: 1968

Re: Is an Aircraft Perfectly Balanced 50/50?

Not sure how to phrase the question - but is a Boeing 787 or Airbus A321 without the airline customers configuration of seats, etc., perfectly balanced 50/50? If you were to draw a line down the middle of the plane, would both sides be equal in weight? The airplane isn't symmetrical left/right, so ...

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by Florianopolis
Fri May 20, 2022 2:50 am
Forum: Technical/Operations
Topic: STARs with INS
Replies: 19
Views: 2033

Re: STARs with INS

The STAR (or SID, or IAP) will say what kind of navigation performance capability is required to fly it. If your avionics can't tell you where you are with the precision necessary to fly the procedure, you can't fly that procedure. Pick another way to get yourself where you want to go. The airport p...

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by Florianopolis
Thu Jan 27, 2022 6:33 pm
Forum: Technical/Operations
Topic: Turbofan throttle response
Replies: 18
Views: 2457

Re: Turbofan throttle response

Copy and Pasted from the FAA's Airplane Flying Handbook: In a piston-engine, propeller-driven airplane, thrust is proportional to rpm, manifold pressure, and propeller blade angle, with manifold pressure being the most dominant factor. At a constant rpm, thrust is proportional to throttle lever posi...

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by Florianopolis
Sat Jan 15, 2022 9:32 pm
Forum: Technical/Operations
Topic: What are these sort of vertical lines above the leading edge of this 747.
Replies: 3
Views: 1847

Re: What are these sort of vertical lines above the leading edge of this 747.

My guess? They are panels that can be removed to get into the leading edge of the wing, and with age and repeated removal, the seams / gap filler material loses its paint. 5694401,2106321 http://www.lufthansa-technik.com/documents/5875801/6291465/171123_SOFIA_039_2x1/637ed5e5-e2e9-48c4-9f78-ae7e1623...

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by Florianopolis
Tue Nov 30, 2021 3:19 am
Forum: Technical/Operations
Topic: Japanese overwing markings
Replies: 8
Views: 3520

Re: Japanese overwing markings

Echoing others, the black stripe on all stretch 777's is over the main gear for the tail camera. 6147645,6597809,6350005 Although JAL's airplanes have the black stripe on all of their wings. I dunno why, maybe to help detect ice, like MD-80's have? 5090109,6590739 ANA is the only one with the orange...

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by Florianopolis
Tue Oct 12, 2021 12:37 am
Forum: Technical/Operations
Topic: What's this contraption?
Replies: 14
Views: 3501

Re: What's this contraption?

Thanks everyone

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by Florianopolis
Mon Oct 11, 2021 1:54 am
Forum: Technical/Operations
Topic: What's this contraption?
Replies: 14
Views: 3501

What's this contraption?

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by Florianopolis
Wed Aug 25, 2021 10:08 pm
Forum: Technical/Operations
Topic: MD-90 better at hot and high airports than the B757?
Replies: 9
Views: 1815

Re: MD-90 better at hot and high airports than the B757?

Yeah, but how much is each carrying how far? Maybe the 757 is below it's max payload but is it still carrying more farther than the maxed-out MD-90?

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by Florianopolis
Fri Jul 16, 2021 3:09 pm
Forum: Technical/Operations
Topic: Wing sweepback and turbulence question
Replies: 8
Views: 924

Re: Wing sweepback and turbulence question

@convair880mfan Swept back wings enter the gust (a "w" gust, i.e., a vertical gust) more progressively, so the load factor builds up more slowly. The sharper the gust front, the more obvious the effect. For a bit more technical details, see https://apps.dtic.mil/sti/citations/ADA381486 (o...

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by Florianopolis
Fri Jul 16, 2021 12:26 am
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 2165

Re: Flap movement always in stages?

Florianopolis, in general, on the Airbus A320 series, we normally don't intentionally allow the airspeed to increase to the point where the auto-retract system kicks in, but sometimes, particularly on the A321 since it is a heavier aircraft, it does. During climb out, we are more focused on the var...

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by Florianopolis
Thu Jul 15, 2021 9:12 pm
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 2165

Re: Flap movement always in stages?

Sorta. It depends on whether you are above or below auto-retract speed. The flap movement speeds on takeoff and approach are normally a bit different, so in effect it makes a difference whether you are approaching or departing. For example, you might not retract to clean until 230 knots when depart...

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by Florianopolis
Thu Jul 15, 2021 2:39 am
Forum: Technical/Operations
Topic: Flap movement always in stages?
Replies: 14
Views: 2165

Re: Flap movement always in stages?

This is slightly off-topic, but on the bus if you put the flap lever in 1, the actual position of the flaps and slats depends on if the airplane thinks you're taking off or landing?

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by Florianopolis
Mon Jul 12, 2021 10:44 pm
Forum: Technical/Operations
Topic: Private Jet Subcharter
Replies: 17
Views: 1914

Re: Private Jet Subcharter

Thanks, that makes sense. It's more than just go uber the airplane for the weekend. You change the entire nature of your operation.

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by Florianopolis
Mon Jul 12, 2021 8:15 pm
Forum: Technical/Operations
Topic: Private Jet Subcharter
Replies: 17
Views: 1914

Re: Private Jet Subcharter

GalaxyFlyer wrote:
In the US, the ones I mentioned are about the best, but chartering out a private jet has lots of downsides—beware.


Out of curiosity, what sort of downsides? More than the jet potentially being unavailable because it's scheduled somewhere else?

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by Florianopolis
Mon Jun 28, 2021 4:29 pm
Forum: Technical/Operations
Topic: Control tower in uncontrolled airspace
Replies: 18
Views: 1922

Re: Control tower in uncontrolled airspace

I believe Leesburg, Virginia (JYO) is currently a towered field in Class G. There's probably a NOTAM describing how it operates, otherwise §91.126 applies: §91.126 Operating on or in the vicinity of an airport in Class G airspace. (d) Communications with control towers. Unless otherwise authorized o...

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by Florianopolis
Wed Jun 23, 2021 4:08 pm
Forum: Technical/Operations
Topic: Engine noise question
Replies: 22
Views: 3501

Re: Engine noise question

On landing it's a unique combination of flaps, landing gear, speedbrakes, fuel vents . . . every airplane is a choir for us to enjoy. On takeoff they say it's a combination of jet core noise blasting out behind the engine, and the sweet bird song of supersonic fan blade tips. Not as subtle as the ap...

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by Florianopolis
Tue Jun 22, 2021 4:48 am
Forum: Technical/Operations
Topic: APU Usage
Replies: 18
Views: 3820

Re: APU Usage

Can I ask a dumb question? I've never seen an air conditioning hose that didn't have a fold or kink in it. Are they not actually *designed* to be that way?

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by Florianopolis
Sun Jun 13, 2021 3:06 am
Forum: Technical/Operations
Topic: DFW - You're number ???? for takeoff!
Replies: 42
Views: 7592

Re: DFW - You're number ???? for takeoff!

Is there still a button to push when you roll onto the runway to tell the FMS position that "wherever you think we are right now is the start of the runway" ?

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by Florianopolis
Wed Jun 02, 2021 4:44 pm
Forum: Technical/Operations
Topic: "It's going to take a little longer because we're a Max"
Replies: 19
Views: 5662

Re: "It's going to take a little longer because we're a Max"

The motoring sequence can be as long as 2 or 3 minutes. So in LAX when you get pushed in to the alley, ramp is chomping at the bit to get you moving. The push crew has disconnected and driven off, but the fadec is still motoring the engine and hasn’t even thought about doing the engine start sequen...

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by Florianopolis
Wed May 19, 2021 4:13 pm
Forum: Technical/Operations
Topic: APU Inflight start on Battery
Replies: 8
Views: 2764

Re: APU Inflight start on Battery

I mean it makes sense the air is thinner so the APU has to spin faster, but doesn't that also mean that there's less air to squeeze to the same pressures? The same power going in results in a higher rotation speed because the air is thinner for the same compression, in other words? Could it be becau...

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by Florianopolis
Fri Apr 30, 2021 2:38 am
Forum: Technical/Operations
Topic: Unexplained objects on UPS pushback tug tow bar
Replies: 25
Views: 6127

Re: Unexplained objects on UPS pushback tug tow bar

Maybe storage boxes for wires, pins, wands, etc etc?

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by Florianopolis
Mon Apr 19, 2021 1:10 am
Forum: Technical/Operations
Topic: Driving record impact on pilot background check
Replies: 13
Views: 4536

Re: Driving record impact on pilot background check

I echo what the others have stated. A couple speeding tickets will not foreclose a career (at the majors, at least), but that doesn't mean they're meaningless. If you keep getting them, it indicates a pattern of recklessness and disregard for rules, which are obviously undesirable airline pilot qual...

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by Florianopolis
Sat Mar 13, 2021 8:56 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 3573

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

Trimeresurus, may I recommend getting yourself a copy of Wolfgang Langewiesche's book, Stick and Rudder . Pick up a used copy or try here: https://www.amazon.com/Stick-Rudder-Explanation-Art-Flying/dp/0070362408 From the Back Cover WHAT'S IN STICK AND RUDDER: * The invisible secret of all heavier-th...

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by Florianopolis
Fri Mar 12, 2021 7:53 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 3573

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

Save the DC-8 iirc, various regional jets, some Russian stuff, most aircraft have a positive nose angle to horizon when on a normal descent. I don't want to go too off-topic, but the big difference is the leading edge devices. As you extend and lower the trailing-edge flaps, the wing camber and cho...

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by Florianopolis
Fri Mar 12, 2021 7:18 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 3573

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

How does it manage to keep descending at such a pitch up attitude? 8 degrees of angle of attack and still descending. How does that happen? This is a subtle point, but I'm not sure you're getting it: Angle of attack is only part of whether you are climbing or descending, along with airspeed and thr...

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by Florianopolis
Fri Mar 12, 2021 6:58 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 3573

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

Let's go back to the basics. Imagine you're a student pilot sitting your Cessna 172. Your instructor points to the control yoke in front of you, and says, "You push and pull on this, and what are you controlling?" You say, "I pull back and I climb, I push forward and we descend."...

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by Florianopolis
Sun Mar 07, 2021 1:08 am
Forum: Technical/Operations
Topic: RNAV (RNP) Approaches In The U.S.
Replies: 31
Views: 3465

Re: RNAV (RNP) Approaches In The U.S.

If you can do your checkride in the sim, why can't you demonstrate the approaches for the approval in a simulator, too?

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by Florianopolis
Tue Feb 23, 2021 3:36 am
Forum: Technical/Operations
Topic: Pacific Clipperton FIR doubt..!?
Replies: 6
Views: 1422

Re: Pacific Clipperton FIR doubt..!?

Their logo looks official enough to me: https://i.ibb.co/gSd1J5p/Clipperton.jpg And their "website" is straight jacked from Myanmar's civil aviation authority*. cf https://www.dca.gov.mm/ and http://dca.clipperton-gov.co/ It looks like it's done by these folks: https://ops.group/story/what...

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by Florianopolis
Thu Feb 04, 2021 10:00 pm
Forum: Technical/Operations
Topic: 777-9 back to a grey cockpit ?
Replies: 17
Views: 5734

Re: 777-9 back to a grey cockpit ?

Perhaps things have changed since the 1990s PBS 777 documentary: Warm colors like brown were found to be more inviting, pilots were more alert, and it was better at hiding dirt. http://www.youtube.com/watch?v=0oyWZjdXxlw&t=43m32s Unrelated: I hope we can all be as excited about something in life...

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by Florianopolis
Fri Jan 22, 2021 2:58 am
Forum: Technical/Operations
Topic: Hypothetical: Engine failure on trijet retirement ferry flight
Replies: 15
Views: 2955

Re: Hypothetical: Engine failure on trijet retirement ferry flight

Read up on Part 121.565 (b) says for engine failure enroute for three and four engine planes. You’re not a test pilot in this case, assuming simple engine failure, it’s authorized to continue. Double engine failures are trained on both three and four engine civil types as both initial and recurrent...

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by Florianopolis
Thu Jan 21, 2021 7:18 pm
Forum: Technical/Operations
Topic: Hypothetical: Engine failure on trijet retirement ferry flight
Replies: 15
Views: 2955

Re: Hypothetical: Engine failure on trijet retirement ferry flight

You're gonna have to see what the checklist says to do with the engine failure. Most of the Part 121 ATP-certificated captains I know are acutely jealous of maintaining their certificate privileges, and care much more about that than whether the airplane will need an expensive engine change (that ma...

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by Florianopolis
Tue Jan 19, 2021 8:30 pm
Forum: Technical/Operations
Topic: 787 Engine Start & Spoilers
Replies: 6
Views: 2624

787 Engine Start & Spoilers

http://www.youtube.com/watch?v=srsJ1iUjUzQ&t=3m45s

Is there a reason the spoilers pop up an inch when the engines are starting?
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In re this video: http://www.youtube.com/watch?v=srsJ1iUjUzQ&t=3m45s

Is there a reason the spoilers pop up an inch when the engines are starting?

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by Florianopolis
Mon Jan 11, 2021 11:41 pm
Forum: Technical/Operations
Topic: Stick Force Gradient explanation with regards to MCAS potentially not being needed for 737MAX
Replies: 2
Views: 1229

Re: Stick Force Gradient explanation with regards to MCAS potentially not being needed for 737MAX

I'm failing to see how the Stick Force Gradient would be reduced and forces would be lighter unless the article is referring to the fact that the control authority is lost at these high than normal AOAs and thus deflection of the elevators results in very little change in pitching moment and airspe...

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by Florianopolis
Fri Jan 08, 2021 12:49 am
Forum: Technical/Operations
Topic: 777-9 back to a grey cockpit ?
Replies: 17
Views: 5734

Re: 777-9 back to a grey cockpit ?

http://www.youtube.com/watch?v=pnyIXyIbj-g

I think it's a lot like the 787's, and the 787's is gray, so....
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Looks like it? http://www.youtube.com/watch?v=pnyIXyIbj-g

I think it's a lot like the 787's, and the 787's is gray, so....

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by Florianopolis
Sun Nov 08, 2020 7:02 pm
Forum: Technical/Operations
Topic: Help Identify This Plane
Replies: 11
Views: 2098

Re: Help Identify This Plane

That appears to not have mid-cabin (I was going to say overwing, but that wouldn't be possible, wouldn't it?) exits. At 130 seats you're really pushing it to only have fore and aft doors. It would have been interesting to see if the real plane (if it ever made it off the drawing board) dealt with t...

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by Florianopolis
Sun Nov 08, 2020 6:49 pm
Forum: Technical/Operations
Topic: Help Identify This Plane
Replies: 11
Views: 2098

Re: Help Identify This Plane

Twin 146 makes sense. I knew the internet would come through! Thank you!

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by Florianopolis
Fri Nov 06, 2020 8:36 pm
Forum: Technical/Operations
Topic: Help Identify This Plane
Replies: 11
Views: 2098

Help Identify This Plane

The nose and tail look a little Fokker to me, but I have no idea what this is. Please help me, internet!

Image

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by Florianopolis
Fri Nov 06, 2020 8:33 pm
Forum: Technical/Operations
Topic: What factors defined the main deck cargo door location on freighter?
Replies: 9
Views: 2162

Re: What factors defined the main deck cargo door location on freighter?

I think behind the wing is preferred for CG concerns, but you have to have enough fuselage behind the wing for the deck loader and tugs and other equipment to have room to maneuver without banging into things like flap track fairings. A 777 has enough room; the DC10 might not. I think there's also ...

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by Florianopolis
Thu Oct 29, 2020 11:29 pm
Forum: Technical/Operations
Topic: Pilots of airliners with yokes(Boeing/MD/Embraer/CRJ etc), do you keep your hands on the yoke during autopilot?
Replies: 9
Views: 1784

Re: Pilots of airliners with yokes(Boeing/MD/Embraer/CRJ etc), do you keep your hands on the yoke during autopilot?

http://www.youtube.com/watch?v=5ESJH1NLMLs&t=11m32s
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There are a lot of accidents that would have been prevented if flight crews kept their hands on things to make sure the airplane wasn't trying to kill them.

Here's a short segment from an old training video that talks a little about it: http://www.youtube.com/watch?v=5ESJH1NLMLs&t=11m32s

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by Florianopolis
Thu Oct 29, 2020 11:03 pm
Forum: Technical/Operations
Topic: What factors defined the main deck cargo door location on freighter?
Replies: 9
Views: 2162

Re: What factors defined the main deck cargo door location on freighter?

I think behind the wing is preferred for CG concerns, but you have to have enough fuselage behind the wing for the deck loader and tugs and other equipment to have room to maneuver without banging into things like flap track fairings. A 777 has enough room; the DC10 might not. I think there's also a...

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by Florianopolis
Thu Oct 08, 2020 6:52 pm
Forum: Technical/Operations
Topic: Simulators and Spatial Disorientation
Replies: 13
Views: 2255

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: 2255

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: 3701

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: 2596

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: 1942

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: 3463

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: 3875

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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