Search found 20646 matches

by Starlionblue
Fri Apr 09, 2021 2:20 am
Forum: Technical/Operations
Topic: Extension of flaps and landing gear during turns on large aircraft
Replies: 18
Views: 3179

Re: Extension of flaps and landing gear during turns on large aircraft

It is also considered good airmanship not to move the flaps and the gear at the same time to avoid peak loads on the green hydraulic system (this is also not a limitation/procedure, but is considered good airmanship). I asked about this on a training course in Toulouse once. The manufacturer says i...

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by Starlionblue
Fri Apr 09, 2021 12:48 am
Forum: Technical/Operations
Topic: How do you apply NADP2 procedure?
Replies: 14
Views: 2910

Re: How do you apply NADP2 procedure?

"Standard noise abatement" at my operator does include "Green Dot (Vzf) to 3000ft" after flap retraction, so we don't accelerate to 250kt. However in practice by the time you reach 3000ft, you might not even have had time to accelerate to Vzf. At 1500ft, thrust goes to CLB, and ...

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by Starlionblue
Thu Apr 08, 2021 1:58 am
Forum: Technical/Operations
Topic: How do you apply NADP2 procedure?
Replies: 14
Views: 2910

Re: How do you apply NADP2 procedure?

And I will be happy to hear practical applications of NADP2. Not all companies or pilots strictly follow what book says, so actual applications will be appreciated to see here. Thanks. Some would say this is nitpicking but actually you're quite right : Not before 240 m (800 ft) and while maintainin...

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by Starlionblue
Thu Apr 08, 2021 1:48 am
Forum: Technical/Operations
Topic: Extension of flaps and landing gear during turns on large aircraft
Replies: 18
Views: 3179

Re: Extension of flaps and landing gear during turns on large aircraft

If you're using manual thrust, smoothly increase as needed as the slats/flaps and gear come out. The biggest drag change is the gear, but you more or less know how much you need to increase the thrust to compensate. Set an approximate value as the gear comes out, and adjust once a speed trend become...

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by Starlionblue
Wed Apr 07, 2021 1:20 am
Forum: Technical/Operations
Topic: How do you apply NADP2 procedure?
Replies: 14
Views: 2910

Re: How do you apply NADP2 procedure?

Climb rate is indeed reduced but this is accounted for in the calculation. If the conditions mean the required climb rate won't be maintained with the mandated climb procedure we inform ATC and they can change runway, waive the procedure, and so on. Typically, THR RED and ACC altitudes are set auto...

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by Starlionblue
Tue Apr 06, 2021 1:02 am
Forum: Technical/Operations
Topic: When specifying aircraft range?
Replies: 15
Views: 2204

Re: When specifying aircraft range?

It's a bit hard to tell, tbh, because the airport planning document always seems to be based on a "standard three-class layout" or the like, and this layout is anything but "standard". Most operator layouts will be heavier, at least for widebodies. Things like business class sea...

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by Starlionblue
Tue Apr 06, 2021 1:00 am
Forum: Technical/Operations
Topic: How do you apply NADP2 procedure?
Replies: 14
Views: 2910

Re: How do you apply NADP2 procedure?

Climb rate is indeed reduced but this is accounted for in the calculation. If the conditions mean the required climb rate won't be maintained with the mandated climb procedure we inform ATC and they can change runway, waive the procedure, and so on. Typically, THR RED and ACC altitudes are set autom...

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by Starlionblue
Sun Apr 04, 2021 1:37 am
Forum: Technical/Operations
Topic: When specifying aircraft range?
Replies: 15
Views: 2204

Re: When specifying aircraft range?

All those public numbers should be treated with a big scoop of salt. They're marketing figures, and will be massaged to be favourable for the manufacturer's product. Operators need aircraft for specific missions and will negotiate specific performance guarantees. As I recall SQ had performance guar...

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by Starlionblue
Sun Apr 04, 2021 1:29 am
Forum: Technical/Operations
Topic: A/C type behaviour in turbulence
Replies: 26
Views: 4115

Re: A/C type behaviour in turbulence

The 787 and A350 have active damping as standard, and I think the entire Airbus FBW range has maneuver load alleviation, which uses the spoilers to unload the wing during turbulence. The A380 has this feature very visible with quite large independent deflections of the ailerons to automatically cou...

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by Starlionblue
Sat Apr 03, 2021 12:50 pm
Forum: Technical/Operations
Topic: Jetblue 106 to Ponce missed approach today?
Replies: 13
Views: 1644

Re: Jetblue 106 to Ponce missed approach today?

I meant that any aircraft having an MTOW near MLW would have an easier time burning enough fuel circling or whatever to get down to MLW. Unlike, say a wide body that experienced a mechanical problem at time at takeoff fully fuelled where getting back was time critical and you couldn't afford to spe...

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by Starlionblue
Sat Apr 03, 2021 12:47 pm
Forum: Technical/Operations
Topic: When specifying aircraft range?
Replies: 15
Views: 2204

Re: When specifying aircraft range?

All those public numbers should be treated with a big scoop of salt. They're marketing figures, and will be massaged to be favourable for the manufacturer's product.

Operators need aircraft for specific missions and will negotiate specific performance guarantees.

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by Starlionblue
Fri Apr 02, 2021 4:47 am
Forum: Technical/Operations
Topic: CRJ-700 “hole” in wing
Replies: 4
Views: 1707

Re: CRJ-700 “hole” in wing

The bottom of the wing is way less sensitive to flow disturbance compared to the top.

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by Starlionblue
Wed Mar 31, 2021 11:04 am
Forum: Technical/Operations
Topic: A/C type behaviour in turbulence
Replies: 26
Views: 4115

Re: A/C type behaviour in turbulence

A330-600 was a nightmare in turbulence. It was just too long and all oscillations were exaggerated in the nose A340-600? IIRC, Airbus introduced some automatic pitch inputs to counter the effect, but that didn't completely "solve" the issue. The 787 and A350 have active damping as standar...

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by Starlionblue
Wed Mar 31, 2021 6:44 am
Forum: Technical/Operations
Topic: How are flight crews positioned for non-daily overseas service?
Replies: 11
Views: 2270

Re: How are flight crews positioned for non-daily overseas service?

In that case in Athens, my guess is the crew would be treated to a mini-holiday, accommodation included. I've done a fair share of those. I love them. Long story short, it is the pilots job to get to and from the base. It is the airlines job to take care of you everywhere else. When I position from...

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by Starlionblue
Wed Mar 31, 2021 4:56 am
Forum: Technical/Operations
Topic: A/C type behaviour in turbulence
Replies: 26
Views: 4115

Re: A/C type behaviour in turbulence

Flight attendants also have a keen perspective on turbulence, which is interesting to contrast with pilots. When flight attendants work, they are working in multiple places related to the center of gravity - forward of it, on it, and behind it. Therefore, they really get to feel how different parts...

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by Starlionblue
Wed Mar 31, 2021 4:54 am
Forum: Technical/Operations
Topic: How are flight crews positioned for non-daily overseas service?
Replies: 11
Views: 2270

Re: How are flight crews positioned for non-daily overseas service?

Five day layover = five days of hotel and allowances. I've never heard of anyone flying home on a multi-day layover, but I suppose it is possible. :D In many cases, there are legal barriers as well. E.g. some countries won't let you travel more than a certain distance from the airport if you enter a...

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by Starlionblue
Wed Mar 31, 2021 4:51 am
Forum: Technical/Operations
Topic: Crosswind Landing Question
Replies: 4
Views: 1408

Re: Crosswind Landing Question

Wing shape and size have a lot to do with it. For example, the A330 is not as stable in gusty winds as the 777 because of the higher aspect wing and lower wing loading. While larger aircraft have more inertia to compensate for larger surface area, it does make a difference in how much you need to an...

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by Starlionblue
Wed Mar 31, 2021 4:45 am
Forum: Technical/Operations
Topic: Why do all new-build cargo aircraft have lower deck cargo areas?
Replies: 10
Views: 2677

Re: Why do all new-build cargo aircraft have lower deck cargo areas?

Why do all new build cargo aircraft have a lower deck cargo area? Shouldn´t cargo aircraft just have fuel tanks on the lower deck as most of the cargo is transported on the main deck? Wouldn´t the lower deck being just fuel tanks allow the aircraft to have TPAC/TATL range from the US west coast? An...

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by Starlionblue
Wed Mar 31, 2021 3:40 am
Forum: Technical/Operations
Topic: Sourcing old electronics for new planes
Replies: 8
Views: 1564

Re: Sourcing old electronics for new planes

AFAIK, the manufacturers of those bits simply buy components in bulk at the time. The FM in the A330 probably uses a 486 processor or the like and Honeywell have a bunch in a warehouse.

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by Starlionblue
Tue Mar 30, 2021 12:17 am
Forum: Technical/Operations
Topic: Airlines that don't require their crews to overnight
Replies: 21
Views: 2746

Re: Airlines that don't require their crews to overnight

As far as I know Ryanair and EasyJet don’t have scheduled overnights. Unfortunately, overnights have become relatively uncommon for short/medium haul flights with many airlines. Make that fortunately. I’d rather be home everyday than spend time away in hotels. No matter how good they are and how ‘g...

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by Starlionblue
Mon Mar 29, 2021 1:45 pm
Forum: Technical/Operations
Topic: Factor safety used in E170 wing
Replies: 2
Views: 1081

Re: Factor safety used in E170 wing

As a general rule structures have a minimum 50% safety factor beyond the load limit. The design load limits for a transport category aircraft are +2.5G/-1G clean, +2G/0G dirty. - Beyond load limits, permanent deformation may occur. - Ultimate load is limit load x1.5. - Beyond ultimate load, the stru...

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by Starlionblue
Sun Mar 28, 2021 1:20 am
Forum: Technical/Operations
Topic: When did English become the Considered Language of the Skies.
Replies: 10
Views: 2080

Re: When did English become the Considered Language of the Skies.

Just to point it out... nearly all radio traffic between ATC and aircraft is done in the local language of each country. Often they only talk English to foreign aircraft. Some countries try to maintain English as the preferred language on the main frequencies, but it's rare. If you fly through Sout...

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by Starlionblue
Thu Mar 25, 2021 1:33 am
Forum: Technical/Operations
Topic: Grass landing strips
Replies: 21
Views: 2561

Re: Grass landing strips

LOL...what airline is that?? Famous Susi Air They even have an awesome TV Show. Oh nice! Thanks for the info!! Most of the episodes are on YouTube. There's a bit of dramatic voiceover syndrome but interesting stuff. I've met a few pilots who've worked in the area and it is indeed as depicted. Flyin...

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by Starlionblue
Wed Mar 24, 2021 1:50 am
Forum: Technical/Operations
Topic: Grass landing strips
Replies: 21
Views: 2561

Re: Grass landing strips

AntonioMartin wrote:
I was just wondering if there are any grass air fields with commercial airline ops....


Indonesia would like a word. :D

Image

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by Starlionblue
Mon Mar 22, 2021 2:42 pm
Forum: Technical/Operations
Topic: Grass landing strips
Replies: 21
Views: 2561

Re: Grass landing strips

I realize the early-days-of-aviation-romance of the grass landing strip and its quaint, throwback history but are they inherently more difficult to handle than pavement? Particularly, when dew covered or wet from a rain? I always imagined them as manicured as a golf fairway, but then I remembered h...

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by Starlionblue
Mon Mar 22, 2021 3:46 am
Forum: Technical/Operations
Topic: Why not wider runways?
Replies: 31
Views: 5070

Re: Why not wider runways?

The problem with landing on the centerline all the time is that Mother Nature has a habit of making that challenging. I'm just suggesting making that challenge a little easier. Is the cost to expand the runways more expensive than the cost of losing an aircraft? There are spacing requirements for t...

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by Starlionblue
Sun Mar 21, 2021 1:56 am
Forum: Technical/Operations
Topic: PIC Swap With Two Captains?
Replies: 10
Views: 1941

Re: PIC Swap With Two Captains?

Thanks for the responses guys! Follow up, on long-haul multiple-crew flights, what is the procedures for handling unexpected/emergency situations while the PIC/commander is in rest? If there is a situation that warrants the commander's attention, he/she is simply notified. However, the relief quali...

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by Starlionblue
Sat Mar 20, 2021 3:28 am
Forum: Technical/Operations
Topic: PIC Swap With Two Captains?
Replies: 10
Views: 1941

Re: PIC Swap With Two Captains?

Well, there's a commander on the flight plan, so I guess that's your answer.

No idea how they determine it. ;)

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by Starlionblue
Sat Mar 20, 2021 3:27 am
Forum: Technical/Operations
Topic: How are aircraft scheduled for major airlines?
Replies: 4
Views: 1389

Re: How are aircraft scheduled for major airlines?

Simplistic answer, but there's software. :D

You can normally book a flight a year in advance, so the schedule itself goes out that far in many cases. Specific tail assignment is not done that far out though.

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by Starlionblue
Fri Mar 19, 2021 12:36 am
Forum: Technical/Operations
Topic: HUD on commercial aircraft.
Replies: 8
Views: 1608

Re: HUD on commercial aircraft.

I have always viewed HUDs as an American thing. Initially devised to use for low vis in aircraft without autoland IIRC (thinking DC-9/MD80 etc. here). Over in Europe, which really needs low vis ops, HUDs have not really caught on. My lot operates CATIIIB to 75m RVR Minima without HUD. That said, I ...

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by Starlionblue
Thu Mar 18, 2021 2:33 pm
Forum: Technical/Operations
Topic: Parting out retired aircraft
Replies: 14
Views: 2095

Re: Parting out retired aircraft

Was just reading an interesting article from the UK on retired BA 747s that left me with a question. Are there parts from, say a 15-year-old 747 that might be useful in other, more modern airframes, similar to the way car parts often span a range of years, makes and models? Is would everything from...

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by Starlionblue
Wed Mar 17, 2021 1:40 am
Forum: Technical/Operations
Topic: Sunwing 737 Runway 28 Landing at SXM on video
Replies: 41
Views: 6735

Re: Sunwing 737 Runway 28 Landing at SXM on video

Thank you very much for the clear reply. I have another related question: are visual approaches with downwind and half-turn safer than circling approaches? Briefly reading on Wikipedia, circle-to-land is used when "the other runways might lack instrument procedures or their approaches cannot b...

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by Starlionblue
Wed Mar 17, 2021 1:32 am
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: 2982

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

Lift is reduced in a climb only assuming a constant AoA at the same speed. Unless you're just doing a very small climb, you'd point the nose up to increase AoA. Since AoA is increased, lift increases in your typical climb. More lift means more drag, which is offset by thrust. The engine is part of ...

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by Starlionblue
Tue Mar 16, 2021 1:25 pm
Forum: Technical/Operations
Topic: Can the A321XLR make it LHR-HLE direct?
Replies: 43
Views: 9561

Re: Can the A321XLR make it LHR-HLE direct?

Random thought- there are many cases of flights to remote destinations that lack diversion points other than the point of origin (hence round-trip fuel), but are there any examples where the nearest diversion point (in this case ASI) is also very remote? Flying to HLE where the weather there and at...

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by Starlionblue
Tue Mar 16, 2021 4:06 am
Forum: Technical/Operations
Topic: Why are engines on planes changed so often?
Replies: 18
Views: 3703

Re: Why are engines on planes changed so often?

Engines (and aircraft, and APUs) are leased in order for the operator to have a reliable and even expenditure over time. If you own the engines outright and one breaks down in dramatic fashion, you have an unpredictable and large expense. If you lease the engine you keep paying the same amountand th...

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by Starlionblue
Tue Mar 16, 2021 2:57 am
Forum: Technical/Operations
Topic: Can the A321XLR make it LHR-HLE direct?
Replies: 43
Views: 9561

Re: Can the A321XLR make it LHR-HLE direct?

Random thought- there are many cases of flights to remote destinations that lack diversion points other than the point of origin (hence round-trip fuel), but are there any examples where the nearest diversion point (in this case ASI) is also very remote? Flying to HLE where the weather there and at...

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by Starlionblue
Mon Mar 15, 2021 6:57 am
Forum: Technical/Operations
Topic: Question re. B737 & TOGA
Replies: 13
Views: 1658

Re: Question re. B737 & TOGA

What I was thinking of is the reduced wear and tear on the engine would make it have better reliability in obtaining full thrust if it is required in an emergency event. Obviously one cannot use full thrust if a derated takeoff was planned for a number of reasons mainly aircraft control. Wording wa...

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by Starlionblue
Mon Mar 15, 2021 6:56 am
Forum: Technical/Operations
Topic: Sunwing 737 Runway 28 Landing at SXM on video
Replies: 41
Views: 6735

Re: Sunwing 737 Runway 28 Landing at SXM on video

I'm sorry for layman's question, but is that a "circling approach" or something different? How common are those approaches for widebodies? I used to see 777s, 767s and 787s doing similar approaches often near my home in a 2,000m runway, and I always assumed most airports with terrain limi...

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by Starlionblue
Mon Mar 15, 2021 2:44 am
Forum: Technical/Operations
Topic: Question re. B737 & TOGA
Replies: 13
Views: 1658

Re: Question re. B737 & TOGA

Both methods are ways of obtaining Reduced Thrust. They obviously have different limitations on when and how they may be used. They are there to reduce engine wear to provide longer life, ensure reserve engine thrust availability in the event of some emergencies and better economics. For details se...

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by Starlionblue
Mon Mar 15, 2021 2:20 am
Forum: Travel, Polls & Preferences
Topic: Why no Boeing 707 stretch?
Replies: 19
Views: 3805

Re: Why no Boeing 707 stretch?

. the KC-135 (Boeing model 717*) The official designation of the KC-135 is Boeing 717-148. The twin-engine version of the Boeing 717 aircraft - original MD-95 design - are assigned a -200 designation, I.e. Boeing 717-200, and from a review of the data at rzjets.net, many have the Boeing customer co...

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by Starlionblue
Mon Mar 15, 2021 1:51 am
Forum: Technical/Operations
Topic: Question re. B737 & TOGA
Replies: 13
Views: 1658

Re: Question re. B737 & TOGA

Starlionblue - thanks, but you are talking about an Airbus of course: I was really asking about Boeings (no FLEX option there!). I think I was aware of the various options, but wondered if using TOGA had become pretty much standard. I note that "On the 737NG I fly it's 100% always TOGA", ...

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by Starlionblue
Sun Mar 14, 2021 2:45 pm
Forum: Technical/Operations
Topic: Question re. B737 & TOGA
Replies: 13
Views: 1658

Re: Question re. B737 & TOGA

The vast majority of takeoffs are at reduced thrust. FLEX/Assumed Temp or Fixed Derate. TOGA is used when that much thrust is needed. TOGA saves a bit of fuel, but the extra wear costs more than the saved fuel. If the conditions suggest TOGA is advisable, e.g. windshear reports, TOGA may be set or b...

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by Starlionblue
Sun Mar 14, 2021 12:55 am
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: 2982

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

Importantly, and as shown in Florianopolis' reply above, AoA is not directly related to pitch angle. There have been accidents where the aircraft has been pointed almost straight down, while still being stalled. Yes, but only momentarily. If the aircraft suddenly pointed it's nose downwards while t...

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by Starlionblue
Sat Mar 13, 2021 1:42 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: 2982

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

On a 320 flaps 3 landing, at Vref airspeed, the nose is 5 degrees nose up, with the FPA indicating 3 degrees nose down. so my AoA during final approach in an A320 is 8 degrees of AoA and still descending to land on the runway. I could be wrong though. As far as I understand, pitch and AoA are relat...

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by Starlionblue
Sat Mar 13, 2021 7:45 am
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: 2982

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

carrier aircraft unlike commercial airliners and general aviation, during approach and landing don't fly airspeed - Vref or anything like that. instead they fly AoA using the indexer that is a prominent instrument just to the left of the HUD. they're just looking for a circle that says they're &quo...

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by Starlionblue
Sat Mar 13, 2021 1:35 am
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: 2982

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

It is a controlled descent. Lift is still being generated and holding the plane weight- it’s just holding it in a descent profile. Just ends with no flare as you note. They basically crash it into the deck and go to full throttle as they do so in case the arrester cable breaks. Note the very strong...

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by Starlionblue
Fri Mar 12, 2021 2:02 am
Forum: Technical/Operations
Topic: Holding the nose wheel off
Replies: 35
Views: 4067

Re: Holding the nose wheel off

Not sure about the big jets going paved runway to paved runway, but keeping the nose up is a very common technique when taxiing, taking off and landing on unpaved surfaces to keep the props/engines away from the gravel. Higher nose results in more ground clearance for the engines and also once the ...

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by Starlionblue
Fri Mar 12, 2021 1:58 am
Forum: Technical/Operations
Topic: Taxi and Delay Times
Replies: 31
Views: 2633

Re: Taxi and Delay Times

It is complicated. I'm still try to figure out why traffic lights stay red when there is no cross traffic in sight. So if all traffic lights were green and you have two vehicles coming into the intersection from two different directions at the exact same time, do they run into each other because bo...

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by Starlionblue
Thu Mar 11, 2021 11:44 am
Forum: Technical/Operations
Topic: Door Latch Question
Replies: 18
Views: 2334

Re: Door Latch Question

fr8mech wrote:
But, that door is latched. The handle just wasn’t stowed properly. Sloppy, but still locked.


Aaaah.

But isn't that just bad handle design? ;)

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