Search found 3369 matches

by airplay
Mon Jun 04, 2001 3:48 am
Forum: Technical/Operations
Topic: Decompression Above FL40
Replies: 8
Views: 3110

RE: Decompression Above FL40

This is strange......I started a similar thread on another forum because I've been doing alot of high altitutde flying, but it looks like alot of the answers are here. I did a little investigating though, and this is what I found. The latest amendment of FAR 25 (Aircraft Design Standard for Large Ai...

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by airplay
Mon Jun 04, 2001 3:26 am
Forum: Technical/Operations
Topic: % Of Used Material In 737-100/200 Design
Replies: 3
Views: 4184

RE: % Of Used Material In 737-100/200 Design

Although I have no data to back it up, the number is probably 0% and is much the same in new aircraft except for some of the interior materials. Used and reclaimed material tends to have subtle differences at the molecular level than new material. For this reason, the US auto industry began reducing...

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by airplay
Mon Jun 04, 2001 3:16 am
Forum: Technical/Operations
Topic: Are These Aircrafts Hydroplaning?
Replies: 20
Views: 4780

RE: Are These Aircrafts Hydroplaning?

Hydro-planing is only a factor if you're trying to turn at low airspeeds (taxiing) or during braking. Large aircraft typically do not do either at take-off or landing at least until the aircraft slows down. The rudder and vertical stabilizer has much more authority over the direction of the airplane...

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by airplay
Mon Jun 04, 2001 12:32 am
Forum: Technical/Operations
Topic: An Amusing Story
Replies: 8
Views: 1268

RE: An Amusing Story

My story is like the original jump seat story in this thread but in reverse! I was working for an airline and was trying to get out of town to begin my holidays. I was to meet my wife and children who had left the previous day. It was a Friday on a long weekend and the airplane was fully booked. The...

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by airplay
Sun Jun 03, 2001 3:36 am
Forum: Civil Aviation
Topic: This Can't Be True .........
Replies: 77
Views: 4463

RE: This Forum Can't Be True .........

I rarely log on to this forum. I usually stick to the tech/ops forum. It took only a short skim of the posts in this thread to remember why this forum is often called "the idiot forum". If you're not arguing about what's the best shade of pink on airplanes or what the favorite type of screws used on...

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by airplay
Sat Jun 02, 2001 10:51 pm
Forum: Technical/Operations
Topic: What's The Deal With The JT8D?
Replies: 4
Views: 3085

RE: What's The Deal With The JT8D?

Just a clarification. In simplistic terms, the "turbines" are downstream of the combustion chamber of the engine. They extract power to run the compressor and/or propeller or fan (if applicable) at the other end of the engine. In jet engines the turbines are at the rear and the compressor is at the ...

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by airplay
Thu May 31, 2001 10:42 am
Forum: Technical/Operations
Topic: B737 Eng Fire Detection - Kidde System General
Replies: 11
Views: 12267

RE: B737 Eng Fire Detection - Kidde System General

Actually, The heat/fire detector measures capacitance of the loop. When the material separating the center and outer conductors is heated, it's dielectric properties are changed, effectively changing the capacitance of the loop. Some of the older graviner units (Kidde bought Graviner) used to be rea...

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by airplay
Wed May 30, 2001 8:09 am
Forum: Technical/Operations
Topic: "Speed Is Buster"?
Replies: 7
Views: 3239

RE: "Speed Is Buster"?

Doesn't Concorde use afterburners?

 Smile

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by airplay
Thu May 24, 2001 9:54 am
Forum: Technical/Operations
Topic: Dotted Green Arc
Replies: 6
Views: 2817

RE: Dotted Green Arc

Oh! THAT green arc.  <img src="/discussions/graphics/smile.gif" ALT="Smile"> That segmented green line represents a boundary of a terminal area or other such navigation deliniation. It is part of the MAP display along with the little blue navaid symbols. If the display was "zoomed" out (Range c...

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by airplay
Wed May 23, 2001 1:40 pm
Forum: Technical/Operations
Topic: 'INOPERATIVE' Sticker On Engineers Panel
Replies: 38
Views: 7851

RE: 'INOPERATIVE' Sticker On Engineers Panel

JETPILOT, You need to re-read my post. In it I stated that your statement : "An INOP sticker has nothing to do with an MEL. An INOP placard is placed on an instrument or system that is no longer used but is still installed" is misleading. It implies that this is the accepted practice worldwide, and ...

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by airplay
Wed May 23, 2001 1:12 am
Forum: Technical/Operations
Topic: 'INOPERATIVE' Sticker On Engineers Panel
Replies: 38
Views: 7851

RE: 'INOPERATIVE' Sticker On Engineers Panel

JT-8D, Actually, your initial answer was pretty good in my opinion. So please don't think my comments were aimed at you. For the most part I think most of your opinions and contributions to this forum are factual and complete. I apologize for implying that your post was included in the category of "...

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by airplay
Tue May 22, 2001 11:46 am
Forum: Technical/Operations
Topic: 'INOPERATIVE' Sticker On Engineers Panel
Replies: 38
Views: 7851

RE: 'INOPERATIVE' Sticker On Engineers Panel

Ambasaid, Just a clarification. As long as the intruder aircraft has a transponder, a TCAS equipped aircraft will have the benifit of collision avoidance. There is no technical requirement for both involved aircraft to be fitted with TCAS. This still allows protection of the passenger carrying comme...

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by airplay
Tue May 22, 2001 11:41 am
Forum: Technical/Operations
Topic: Taps On Aircraft
Replies: 6
Views: 2228

RE: Taps On Aircraft

I think the point is being missed here. A tap is a "cutting" device which is made of a hard metal and is designed to remove material from the softer item which is being tapped. When you use a tap on a manufactured fastener, you are effectively changing the characteristics of the fastener and consequ...

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by airplay
Tue May 22, 2001 1:10 am
Forum: Technical/Operations
Topic: 'INOPERATIVE' Sticker On Engineers Panel
Replies: 38
Views: 7851

RE: 'INOPERATIVE' Sticker On Engineers Panel

I've just been through the experience of reading the entire thread on this topic. I've felt emotions ranging from frustration, to annoyance and on to elation. This thread is fairly typical in that a couple of "semi-correct" responses at the beginning stimulate conversation until someone finally stee...

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by airplay
Sat May 19, 2001 6:42 am
Forum: Technical/Operations
Topic: Taps On Aircraft
Replies: 6
Views: 2228

RE: Taps On Aircraft

A tap is not the proper tool to use to clean threads on anything much less an aircraft fastener.

You can purchase a "thread chaser" from most tool supply companies.

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by airplay
Sun May 13, 2001 12:17 pm
Forum: Technical/Operations
Topic: FL410, Possible?
Replies: 41
Views: 4610

Source For MAX Operating Altitude

The maximum operating altitudes for the aircraft discussed are published in the Type Certificate and the AFM. The AFM is listed as "required" equipment in the Type Certificate which lists the approved AFM for the aircraft. The confusion comes in at this level. Many different countries develop their ...

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by airplay
Sun May 13, 2001 11:46 am
Forum: Technical/Operations
Topic: Handheld GPS Receivers On Aircraft...
Replies: 30
Views: 3386

RE: Handheld GPS Receivers On Aircraft...

I tried one of the earlier Garmin units available on a Piper Navajo. I think it was a Garmin 50 or something like that. ( I don't remember for sure) We stuck the detachable antenna on the glare shield. The thing was extremely erratic whenever we were airborne. After consulting with Garmin, we were i...

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by airplay
Fri May 11, 2001 8:52 am
Forum: Technical/Operations
Topic: Cell Phones
Replies: 27
Views: 2433

RE: Cell Phones

I just had an interesting thought..... Everyone knows the story of the deHavilland Comet and how an engineering flaw incorporated sqaure windows in the design which were not resistant to mechanical stress as are rounded windows. The design was a victim of a lack of knowledge about design stresses an...

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by airplay
Fri May 11, 2001 8:23 am
Forum: Technical/Operations
Topic: Cell Phones
Replies: 27
Views: 2433

RE: 242

242, Aren't you listening? (or reading) There are a few posts on this thread documenting interference. I have documented this sort of thing for certification purposes, and the information helped form the final design. Of course the average engineering report is not accessible to the public. So.........

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by airplay
Thu May 10, 2001 10:39 am
Forum: Technical/Operations
Topic: Cell Phones
Replies: 27
Views: 2433

Re: Cell Phones

RTCA developed document DO-233 titled "Portable Electronic Devices Carried on Board Aircraft" RTCA describes the document as: This document addresses the potential interference to installed aircraft electrical and electronic systems from Portable Electronic Devices (PEDs) carried aboard by passenger...

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by airplay
Sat Apr 28, 2001 10:55 am
Forum: Civil Aviation
Topic: Dash 8
Replies: 7
Views: 1094

RE: Dash 8

The Dash 8-200 goes faster!

 Smile

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by airplay
Thu Apr 19, 2001 11:00 am
Forum: Technical/Operations
Topic: Aerospace Engineering
Replies: 12
Views: 3944

RE: Aerospace Engineering

I work for an aerospace engineering and certification company in Canada. I find that we can weather the finiancial cycles quite well. In good financial times, we are busy with completion modification and upgrades. In bad times we are busy with mandated modifications and repairs to the "old" aircraft...

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by airplay
Mon Apr 16, 2001 12:12 am
Forum: Technical/Operations
Topic: Way To Close,what Do You Think?
Replies: 27
Views: 3778

RE: Way To Close,what Do You Think?

DG_Pilot, The port wing is the aircraft's left wing, the starboard wing is the aircraft's right wing. Picky? Maybe. Also, I agree that this does NOT look like a retouched photo. All the shadows agree perfectly. If it is a fake, congratulations to the artist!  <img src="/discussions/graphics/smi...

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by airplay
Thu Apr 12, 2001 10:48 am
Forum: Technical/Operations
Topic: Degrees To BE Classed?
Replies: 2
Views: 1524

RE: Degrees To BE Classed?

You always needed a degree to be an engineer. I think what you are talking about is an aircraft mechanic. or in the US an AMT (aircraft maintenance technician) or in Canada an AME (aircraft maintenance engineer).

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by airplay
Tue Apr 10, 2001 10:41 am
Forum: Technical/Operations
Topic: My Problems!
Replies: 14
Views: 1483

RE: My Problems!

Why hobby and not ops/tech?

Easy now.....it was just a misunderstanding. On first read It looked like Jet Joc was asking how to make a turn on FS2K. On a careful re-read I see it relates to a real airplane.

Carry on!

 Smile

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by airplay
Tue Apr 10, 2001 10:33 am
Forum: Technical/Operations
Topic: Cabin Pressurization
Replies: 6
Views: 2278

RE: Cabin Pressurization

The failure rate of pressurization systems is moot when you consider that many (I've witnessed this) pilots who regularily fly at high altitudes, do not follow regulations and don masks, or in the case of quick donning masks, many don't bother checking them during pre-flight.

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by airplay
Sun Apr 08, 2001 11:26 am
Forum: Technical/Operations
Topic: What Is
Replies: 9
Views: 1416

FBW Isn't All That New

737s have had a similar "fly by wire" system since they were first built. ie: when the autopilot is engaged in manual mode, the aircraft can be flown by moving the control column and wheel without the movement of the associated control cables or PCU actuators. A force detector in the control column ...

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by airplay
Sun Apr 08, 2001 11:15 am
Forum: Technical/Operations
Topic: My Problems!
Replies: 14
Views: 1483

RE: My Problems!

With all due respect, I think this topic belongs in the aviation hobby section.

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by airplay
Mon Apr 02, 2001 12:39 pm
Forum: Technical/Operations
Topic: This'll Get Ya Thinkin!
Replies: 7
Views: 2094

RE: This'll Get Ya Thinkin!

FDXMech Older turboprops (like the HS748) and pretty much all light twins parallel the DC generators. In the 748, a paralleling sense wire is run between the interpole windings in each the generator, via the voltage regulators and the over-voltage sensors. This sensing line between the over-voltage ...

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by airplay
Mon Apr 02, 2001 12:23 pm
Forum: Technical/Operations
Topic: Can Someone Explain This?
Replies: 22
Views: 3638

RE: Can Someone Explain This?

On close inspection, the picture looks a bit phony. This may be part of the reason it's provided so small. (you can't zoom in very well) The thing that immediately strikes me is that its not a commercial airliner. I beleive it's a KC-135 tanker. Is it so unusual that a fuel tanker may vent some fuel?

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by airplay
Mon Apr 02, 2001 2:26 am
Forum: Civil Aviation
Topic: BD700 (Global Express) As An Airliner
Replies: 8
Views: 1784

RE: BD700 (Global Express) As An Airliner

When you buy a Global Express from Bombardier it is "Bare Boned". Then you take it to a "Completion Centre" like the one that Bombardier has in Montreal or Tucson...and other places. Or you can take it to another completion centre that is not affiliated with Bombardier. Check out the Canadian Type C...

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by airplay
Mon Apr 02, 2001 2:11 am
Forum: Civil Aviation
Topic: Consequences Of Airline Employees Posting Here?
Replies: 30
Views: 2861

RE: Consequences Of Airline Employees Posting Here?

I don't work very hard at concealing my identity on forums but I do not identify myself in posts. The main reason for this, is that I don't want to contrue my posts as "Company Policy" or representing any company officials. It can certainly be detrimental to have employees with stong opinions which ...

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by airplay
Mon Apr 02, 2001 2:03 am
Forum: Technical/Operations
Topic: This'll Get Ya Thinkin!
Replies: 7
Views: 2094

RE: This'll Get Ya Thinkin!

Most newer aircraft use split bus architecture because it is simple and reliable compared to other systems that parallel generators. Bombardier even went one step further in the Global Express with wild frequency split bus. This gets rid of the requirment for constant speed drives. Beyond that, a fa...

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by airplay
Mon Apr 02, 2001 1:47 am
Forum: Technical/Operations
Topic: Air Filters/Heat Exchangers/ECS
Replies: 14
Views: 4597

RE: Air Filters/Heat Exchangers/ECS

Some heat exchangers clog faster than others. Alot depends on the operating environment. Aircraft operating in Canada tend to have longer heat exchanger lives than those in aircraft operating in the southern US, because they do not operate as often. Some systems have design weaknesses like the Dash ...

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by airplay
Sun Apr 01, 2001 12:14 pm
Forum: Civil Aviation
Topic: BD700 (Global Express) As An Airliner
Replies: 8
Views: 1784

RE: BD700 (Global Express) As An Airliner

The Global Express is an expensive airplane with many sophistacated systems and redundancy not required by most airlines. (it has 6 generators and 8 hydraulic pumps) Unlike the CRJ, it is delivered with no interior. No seats, baggage compartment, galleys, or lavatories, or even a PA. An interior can...

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by airplay
Mon Mar 26, 2001 1:46 pm
Forum: Technical/Operations
Topic: Reversing Props In Flight?
Replies: 25
Views: 9300

RE: Reversing Props In Flight?

JG,

Yes it was a very lame attempt at humor. It would have made more sense if I put a smiley in there!

 Smile

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by airplay
Mon Mar 26, 2001 2:12 am
Forum: Technical/Operations
Topic: Reversing Props In Flight?
Replies: 25
Views: 9300

RE: Beta Definition...second Try

Actually Buff, you are right, I should have included "approach" configuration in my definition of "BETA". As I said before, as far as operation goes, "beta" will mean different specific things to different airplanes. Maybe some Airbus pilots can give us some examples of what "Alpha Floor" means. I t...

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by airplay
Sun Mar 25, 2001 11:53 am
Forum: Technical/Operations
Topic: Reversing Props In Flight?
Replies: 25
Views: 9300

RE: The Real Meaning Of Beta

First of all, I believe that the Pilatus Turbo Porter can use "reverse" in flight as well, although I have never been able to verify this. Second, "Beta" simply means "ground mode", whereas "Alpha" is "air mode". The "Alpha" term doesn't usually make it out of the engineering reports. As a consequen...

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by airplay
Sun Mar 25, 2001 11:44 am
Forum: Technical/Operations
Topic: Quick Question
Replies: 5
Views: 1226

RE: Quick Question

The basic purpose of an MEL is to give the flightcrew guidance on dispatching the aircraft with faulty equipment and systems. Most MELs are catagorized. That means that a time limit is given for different equipment to be repaired. So even if you can dispatch without the sytem working, you have to ha...

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by airplay
Tue Mar 20, 2001 10:34 am
Forum: Technical/Operations
Topic: Radar Info.
Replies: 3
Views: 1099

RE: Radar Info.

There are actually 2 basic types of transponders in use in civilian aviation today. 1. Mode A/C Most aircraft use a "Mode A/C" type of transponder. The "modes" of a transponder refer to the type of interrogations that the unit replies to. Its a throw-back from the original transponders which were us...

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by airplay
Thu Mar 15, 2001 11:41 am
Forum: Technical/Operations
Topic: Loss Of Transponder And Radio...
Replies: 10
Views: 2876

RE: Loss Of Transponder And Radio...

Something that hasn't been mentioned is the aircraft altitude. Radar isn't always capable of picking up low flying aircraft. High level enroute radar often "filters" out low altitude aircraft. The airplane could have been at low level for quite some time with no radar contact. Another thing, is that...

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by airplay
Thu Mar 15, 2001 11:33 am
Forum: Technical/Operations
Topic: Circle To Land And GPS Approaches
Replies: 3
Views: 4289

RE: Circle To Land And GPS Approaches

GPS approaches are "non-precision" approaches which typically "overlay" existing VOR/DME or NDB approachs. These approachs don't always line up with the runway. They are simply designed to guide the pilot to the final approach fix on the published chart. From there the pilot can determine if he has ...

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by airplay
Tue Mar 13, 2001 12:11 pm
Forum: Technical/Operations
Topic: Fadec
Replies: 3
Views: 971

RE: Fadec

Fadecs engines are not just an engine with electronic means to control them. Simply put, the "Full Authority" describes the engine control system's capability to configure several engine parameters (like fuel and guide vane angle) to achieve efficient operation, and flat rated power to a prescribed ...

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by airplay
Mon Mar 12, 2001 3:31 am
Forum: Technical/Operations
Topic: Metal Fatigue - What Does It Mean?
Replies: 4
Views: 5521

RE: Metal Fatigue - What Does It Mean?

Older aircraft were built with redundant structure such as VC-10 mentioned. Airliners typically had 2 or 3 unique structural systems holding the wings on. This design was based on what is known as "fail-safe" criteria. If one structural component broke, other components would take over. Fail-safe cr...

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by airplay
Sun Mar 11, 2001 11:28 am
Forum: Civil Aviation
Topic: Air Canada Sellin 71 Airplanes?
Replies: 44
Views: 2075

RE: Air Canada Sellin 71 Airplanes!?!?!?!?!?!?!?

I think it would be kinda cool if they picked up some CRJ-700 or CRJ-900 aircraft to replace the F-28/DC-9. Too bad the timing isn't quite right.



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by airplay
Fri Mar 09, 2001 10:38 am
Forum: Technical/Operations
Topic: ERJ135/145 Tools
Replies: 1
Views: 1652

RE: ERJ135/145 Tools

You may want to get a large "aft fuselage re-atachement" wrench. They come in useful after hard landings.

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by airplay
Thu Mar 08, 2001 12:09 pm
Forum: Technical/Operations
Topic: Ndb?
Replies: 9
Views: 1691

RE: Ndb?

An NDB is a non-directional radio beacon. The beacons broadcast in AM in the 200KHz to 400Khz. ADF receivers are designed to receive from 200 KHz to 1700 KHz so they can make use of existing commercial AM radio stations. The ADF receiver uses 2 antennas to find the direction of the beacon, a loop an...

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by airplay
Mon Feb 26, 2001 9:45 am
Forum: Civil Aviation
Topic: Winglets Vs. No Winglets
Replies: 7
Views: 4080

RE: Winglets Vs. No Winglets

I believe part of the reason is the wing design on the 777 calls for a very tapered wing whose chord is relatively narrow at the tips. This reduces wing tip vortices, perhaps to the point where the drag introduced by adding winglets defeats the benifits. (just an educated guess)

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by airplay
Mon Feb 26, 2001 5:23 am
Forum: Civil Aviation
Topic: Winglets Vs. No Winglets
Replies: 7
Views: 4080

RE: Winglets Vs. No Winglets

Winglets don't always have a positive effect on performance. They tried to add them to SAAB 340s with very negative effects. I've heard that Boeing has looked into adding them to the 757, but the wingtip vortices are so strong on this aircraft that unless they add sustantial re-enforcements to the t...

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by airplay
Sun Feb 25, 2001 12:47 pm
Forum: Technical/Operations
Topic: Altitude Question
Replies: 5
Views: 2684

RE: Altitude Question

Just to confuse things..... Some parts of the world (very few parts) use an altimeter setting method known as QFE. This altimeter setting makes the airplane's altimeter read "0" feet when on the ground at the airfield regardless of the station altitude above sea level. You probably won't ever come a...

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