Search found 204 matches

by jsuen
Wed Mar 12, 2003 5:02 pm
Forum: Technical/Operations
Topic: QFA A330 With LCD Flight Deck
Replies: 13
Views: 4396

RE: QFA A330 With LCD Flight Deck

Power consumed by an <acronym title="Louis Trichardt (LCD / FALO / FALT), South Africa">LCD</acronym> includes power used by the backlight inverter as well as power conversion from <acronym title="Air Canada">AC</acronym>. Check Viewsonic's website, a simple desktop VE170 is rated for 60 watts. Aero...

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by jsuen
Wed Mar 12, 2003 1:51 pm
Forum: Technical/Operations
Topic: QFA A330 With LCD Flight Deck
Replies: 13
Views: 4396

RE: QFA A330 With LCD Flight Deck

http://www.thalesgroup.com/avionics/products/download/LCD.pdf

Field of view: +/- 60 degrees horizontal, -10 to +45 degrees vertical.

[Edited 2003-03-12 05:54:27]

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by jsuen
Wed Mar 12, 2003 1:48 pm
Forum: Technical/Operations
Topic: Electronic Flight Bag
Replies: 11
Views: 5531

RE: Electronic Flight Bag

UNIX is far too unreliable for these things. Even the notion of a proper shutdown can't be counted upon in embedded environments. Take a look at some of the embedded realtime operating systems like QNX and Wind River VxWorks. They've found their way into EKG machines, nuclear power plants, weapons c...

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by jsuen
Wed Mar 12, 2003 11:21 am
Forum: Technical/Operations
Topic: QFA A330 With LCD Flight Deck
Replies: 13
Views: 4396

RE: QFA A330 With LCD Flight Deck

LCDs aren't that efficient, especially the ones used in cockpits. CRTs use about 100 watts of power each, while current LCDs are close at 70-80. This means that you still need the redundant forced air cooling systems, which is where the real weight is. LCDs will probably never have the same viewing ...

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by jsuen
Sun Mar 09, 2003 1:02 pm
Forum: Technical/Operations
Topic: QFA A330 With LCD Flight Deck
Replies: 13
Views: 4396

RE: QFA A330 With LCD Flight Deck

The obsolescence of CRTs is a major issue. They're pretty much gone from the cabin, and the flight deck is next. Due to how a CRT works, the vertical component of the Earth's magnetic field affects color (just turn your monitor upside down). CRTs are usually calibrated for Northern or Southern hemis...

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by jsuen
Wed Feb 05, 2003 7:20 am
Forum: Technical/Operations
Topic: Why Can't Planes Fly Too High?
Replies: 24
Views: 21378

RE: Why Can't Planes Fly Too High?

<i>"Critical Mach is the speed at which airflow over any portion of the upper wing surface becomes supersonic in level flight. It is not an airspeed limitation but simply the speed at which shock wave develops over the wing." "Limiting Mach number is the highest speed the aircraft can travel before ...

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by jsuen
Mon Jan 20, 2003 1:57 pm
Forum: Technical/Operations
Topic: Weight And Balance On Airbus
Replies: 5
Views: 14260

RE: Weight And Balance On Airbus

The system is called a Weight and Balance System (WBS). It was introduced as an option on the A310 and has been certified on the A300-600, A320, 330 and 342 and 343. It involves strain sensors on each of the landing gears. From what I understand, the additional maintanence offsets fuel efficiency ga...

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by jsuen
Sat Nov 30, 2002 5:42 pm
Forum: Technical/Operations
Topic: Why No Reverse On Piston Planes
Replies: 21
Views: 13969

RE: Why No Reverse On Piston Planes

><i>I've been working on 172's since 1972 and have yet to see a 172, 182 or a 175 with reversing props. </i> ATCT said he flew a 172 with a reversing prop. You and Chief said they didn't exist. You said that he was smoking crack for having flown one. Cheif said that nobody would spend the money to m...

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by jsuen
Fri Nov 29, 2002 5:55 pm
Forum: Technical/Operations
Topic: Why No Reverse On Piston Planes
Replies: 21
Views: 13969

RE: Why No Reverse On Piston Planes

Maybe not in Alaska, but try the Czech Republic. The Lom Praha V546 is a constant speed hydraulic with optional reverse. http://www.moraviation.com/lom.html

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by jsuen
Sat Nov 23, 2002 4:44 am
Forum: Technical/Operations
Topic: Flight Recorder / Black Boxes
Replies: 11
Views: 4079

RE: Flight Recorder / Black Boxes

A major problem with CVRs is that they are not properly switched off after an incident or minor accident. The NTSB is pushing for carriers to ensure the CBs are pulled when necessary. Also, new two-hour recorders should help. CVRs and FDRs are run off aircraft power which can fail during an accident...

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by jsuen
Tue Nov 19, 2002 5:23 pm
Forum: Technical/Operations
Topic: Flight Deck Colors
Replies: 10
Views: 4078

RE: Flight Deck Colors

Actually, Airbus will never sell a A380-XBROWNCACA. They've taken great pains to keep the flight decks common across models and airlines. Seems to be rather popular with MX and the pilots. They've never sold them in anything but blue.

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by jsuen
Sun Nov 17, 2002 7:32 pm
Forum: Technical/Operations
Topic: Can A "normal" Airliner Go At Supersonic Speed
Replies: 34
Views: 18306

RE: Can A "normal" Airliner Go At Supersonic Speed

I just wanted to point out to Ikarus regarding that what you see on a wing is a normal shock and you typically should only see it on supercritical airfoils. There are said to be only three major developments in subsonic airfoils: the invention of the wing, swept wings, and supercritical airfoils. Th...

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by jsuen
Sat Nov 16, 2002 4:15 pm
Forum: Technical/Operations
Topic: A340 Cockpit Instrumentation
Replies: 2
Views: 3525

RE: A340 Cockpit Instrumentation

They are called the DCDU, Datalink Control and Display Unit, part of the Airbus FANS, Future Air Navigation System, which is part of a system called CNS/ATM, Communication Navigation and Surveillance/Air Traffic Management. They are hooked in to the ATSU, Air Traffic Services Unit... This system is ...

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by jsuen
Mon Nov 04, 2002 9:09 am
Forum: Technical/Operations
Topic: If An Airbus, Would This Flight Have Crashed?
Replies: 39
Views: 12082

RE: If An Airbus, Would This Flight Have Crashed?

If an airplane has an alternate method of complaince, there is nothing wrong with it not meeting 50% <i>additional safety margin</i>. It is not "getting away", it is more advanced engineering. Modern bridges, cars, and buildings are all built with reduced margins because they simply are not necessar...

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by jsuen
Sun Nov 03, 2002 10:28 am
Forum: Technical/Operations
Topic: If An Airbus, Would This Flight Have Crashed?
Replies: 39
Views: 12082

RE: If An Airbus, Would This Flight Have Crashed?

Red Triangle Production's A320 notes. It should be in any Airbus flight control laws overview, such as this http://www.airbusdriver.net/airbus_fltlaws.htm or Eric Park's notes on the same site.

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by jsuen
Sun Nov 03, 2002 9:09 am
Forum: Technical/Operations
Topic: If An Airbus, Would This Flight Have Crashed?
Replies: 39
Views: 12082

RE: If An Airbus, Would This Flight Have Crashed?

I checked on the flight laws. Abnormal Law activates when either Pitch > +50 or -30 degrees (almost twice standard hard limits), AOA > +30 or -10 degrees Airpseed > 440 or < 60 Kts Mach > .91 or <.1 Bank Angle > 125 degrees (almost twice standard limit of 67) While these conditions are exceeded, yaw...

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by jsuen
Sun Nov 03, 2002 7:23 am
Forum: Technical/Operations
Topic: If An Airbus, Would This Flight Have Crashed?
Replies: 39
Views: 12082

RE: If An Airbus, Would This Flight Have Crashed?

No, the Airbus FBW system has hard pitch limits at 30 degrees nose-up and 15 degrees nose-down.

If the computers found the airplane in excess of these limits, Abnormal Law would engagae and hard limits removed for the remainder of the flight.

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by jsuen
Mon Oct 28, 2002 12:19 pm
Forum: Civil Aviation
Topic: Air Security Of Laptop Computers
Replies: 16
Views: 2119

RE: Air Security Of Laptop Computers

Turning it on is silly, as Houstondallas says. The airports I've been in most commonly don't have the turn on requirement. What is true is that it makes it easier to screen the laptops and their bags, as Artsyman says. Usually people carry along a mile of cables and other electronic stuff. By separa...

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by jsuen
Tue Oct 22, 2002 3:03 pm
Forum: Technical/Operations
Topic: Radar-induced Sterility Of Ground Crews
Replies: 20
Views: 22880

RE: Radar-induced Sterility Of Ground Crews

I stand corrected on the radar detector. However, aircraft weather radars do emit in the hundreds of watts, as given in this example <a href="http://www.flwsradar.com/Product_Info/specs.html" target=_blank>http://www.flwsradar.com/Product_Info/specs.html</a>. The instantaneous energy is about 15kW, ...

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by jsuen
Tue Oct 22, 2002 7:25 am
Forum: Technical/Operations
Topic: Radar-induced Sterility Of Ground Crews
Replies: 20
Views: 22880

RE: Radar-induced Sterility Of Ground Crews

There's several problems with the solutions Airplay suggested. I haven't heard of anybody trying to do the radar detector, but some aircraft weather radars operate on the 4-8 GHz C band which won't be picked up by automobile radar detectors. Furthermore, taking the specs from a $500 radar detector, ...

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by jsuen
Thu Oct 17, 2002 9:09 am
Forum: Technical/Operations
Topic: Stuff That Animate The Cockpit Computer Screens
Replies: 7
Views: 3651

RE: Stuff That Animate The Cockpit Computer Screens

Actually, some systems do use specific processors. Quite a number of processors have found their way into aerospace applications, including the 80186, 80386, 80486, i960, Motorola 68K series, and the Sun Sparc series. The Airbus ELACS use 80186s while the SECs run on 68Ks. A major problem is that th...

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by jsuen
Wed Oct 16, 2002 10:17 am
Forum: Technical/Operations
Topic: Stuff That Animate The Cockpit Computer Screens
Replies: 7
Views: 3651

RE: Stuff That Animate The Cockpit Computer Screens

Since you're interested in Airbus, here's some further information on the Airbus FBW side. The System Data Acquisition Concentrator receives data from most aircraft sensors, performs analog-to-digital conversion and distributes it to the flight control computers, the Flight Warning Computer, and the...

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by jsuen
Fri Oct 04, 2002 12:13 am
Forum: Technical/Operations
Topic: Choppers With JSF Configured Engines?
Replies: 6
Views: 3022

RE: Choppers With JSF Configured Engines?

Think about it this way. If you just hooked your car engine to a big fan, you would move quite a bit of air. However, your car engine is hooked to your transmission and your wheels. The exhaust from your tailpipe hardly produces thrust at all, yet the engine is producing the same amount of energy (i...

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by jsuen
Thu Oct 03, 2002 3:59 am
Forum: Technical/Operations
Topic: How Do Aircrafts Keep Their Clocks Synchronized?
Replies: 15
Views: 7532

RE: How Do Aircrafts Keep Their Clocks Synchronized?

GPS time is never adjusted for the leap seconds present in UTC. Any GPS receiver should be able to decode the offset broadcast on the GPS signal and can give you UTC. Here in the US, there are quite a number of cheap $20-30 consumer clocks which pick up the WWVB 60 kHz data signal which contains day...

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by jsuen
Tue Oct 01, 2002 5:33 am
Forum: Technical/Operations
Topic: How Did Pilot Know I Forgot To Turn Off My Phone?
Replies: 26
Views: 7167

RE: How Did Pilot Know I Forgot To Turn Off My Phone?

Regarding cell phone detectors: they do exist and are routinely used on at least one Italian airline before takeoff.

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by jsuen
Tue Sep 24, 2002 4:19 am
Forum: Technical/Operations
Topic: What Things Really Bug You?
Replies: 6
Views: 2215

RE: What Things Really Bug You?

Here's one: lavatory doors which fold in the middle. I was on a CX A340, and I noticed quite a number of people kept pounding on the door, not being able to open it. They eventually gave up and went to the lav with a conventional door. Upon examination, I realized that all of the No Smoking and smok...

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by jsuen
Thu Sep 12, 2002 5:43 pm
Forum: Technical/Operations
Topic: Space Shuttle Airspace
Replies: 12
Views: 6536

RE: Space Shuttle Airspace

The Outer Space Treaty establishes that air laws do not apply over what is currently accepted as 62 miles. Like Antartica, space cannot be claimed or restricted. The only traffic controls are for geosynchronous satellites, which the ITU regulates.

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by jsuen
Mon Sep 09, 2002 5:32 pm
Forum: Technical/Operations
Topic: Engineering Consoles On 777's
Replies: 7
Views: 3155

RE: Engineering Consoles On 777's

The A330/340 has the Central Maintanence System and the 320s have the Centralized Fault Display System. It works pretty much the same way, integrating fault and test access, but its accessed through the pilots' MCDUs.

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by jsuen
Fri Sep 06, 2002 2:57 am
Forum: Technical/Operations
Topic: How Do I Order My Own Boeing
Replies: 20
Views: 5822

RE: How Do I Order My Own Boeing

Those are the figures I heard from Boeing... I think if a financing deal is required, it's done through a separate organization, say GECAS, who pays Boeing according to this schedule.

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by jsuen
Thu Sep 05, 2002 4:27 pm
Forum: Technical/Operations
Topic: How Do I Order My Own Boeing
Replies: 20
Views: 5822

RE: How Do I Order My Own Boeing

The standard payment terms for Boeing, I've heard is 1/3 when ordered, 1/3 before painting, and the remaining 1/3 at delivery.

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by jsuen
Sat Aug 24, 2002 3:35 pm
Forum: Technical/Operations
Topic: Full Thrust Take Off
Replies: 11
Views: 9353

RE: Full Thrust Take Off

The requirement is 30 days / 150 takeoffs for US Air.

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by jsuen
Fri Jul 26, 2002 3:55 pm
Forum: Technical/Operations
Topic: Tcas Operations
Replies: 2
Views: 1613

RE: Tcas Operations

Try "Introduction to TCAS II Version 7", http://www.arinc.com/tcas/tcasform.html.

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by jsuen
Wed Jul 24, 2002 3:08 pm
Forum: Technical/Operations
Topic: Why Do MD-8x Elevators Deflect Up?
Replies: 15
Views: 4891

RE: Why Do MD-8x Elevators Deflect Up?

The DC-9, MD-80, as well as the 717, flight controls are not hydraulic. They are manual.

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by jsuen
Thu Jul 18, 2002 5:04 pm
Forum: Technical/Operations
Topic: The AI
Replies: 3
Views: 1355

RE: The AI

Yes, It's called the ADI. I was going to type in something from a book, but there's much better information here: <a href="http://spaceflight.nasa.gov/shuttle/reference/shutref/orbiter/avionics/dds/adi.html" target=_blank>http://spaceflight.nasa.gov/shuttle/reference/shutref/orbiter/avionics/dds/adi...

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by jsuen
Thu Jul 11, 2002 12:41 pm
Forum: Technical/Operations
Topic: Tcas Priorities
Replies: 10
Views: 2843

RE: Tcas Priorities

Nut,

My source is a Honeywell Change 7 document. It says

Change 6.04A: Earlier and multiple RAs possible since logic evaluates each threat serially.

Change 7: Does a much better job of resolving with a single RA a multi-aircraft encounter. Coordinates more than 2 aircraft simultaneously.

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by jsuen
Wed Jul 10, 2002 5:49 am
Forum: Technical/Operations
Topic: Tcas Priorities
Replies: 10
Views: 2843

RE: Tcas Priorities

TCAS before TCAS II Change 7 cannot coordinate more than one RA at once. The pilot receives multiple RAs. One of the new features of Change 7 is the ability to coordinate an RA with several aircraft.

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by jsuen
Wed Jul 10, 2002 5:41 am
Forum: Technical/Operations
Topic: Onboard Computers
Replies: 15
Views: 4249

RE: Onboard Computers

Funny you mention the Honeywell 757/767 FMS. Unlike the 186s, Honeywell isn't going to have a problem finding the SDP 175/185, because they acquired the design from Sperry (hence Sperry Designed Processor) in the 80s and control its manufacture.

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by jsuen
Tue Jun 04, 2002 6:43 pm
Forum: Civil Aviation
Topic: Best Looking Aircraft
Replies: 39
Views: 2930

RE: Best Looking Aircraft

A346 and MD-90 <br><table align=center border=0 width=500><tr><td><center><font color="#EEEEEE" size="1" face="ARIAL, Helvetica, Geneva"><a href="/open.file/238873/L/" target="_blank">View Large</a> <a href="/open.file/238873/M/" target="_blank">View Medium<br><IMG SRC="/photos/small/3/7/8/238873.jp...

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by jsuen
Mon Jun 03, 2002 7:33 pm
Forum: Civil Aviation
Topic: Question About The Cockpit.
Replies: 3
Views: 1745

RE: Question About The Cockpit.

From <a href="http://asrs.arc.nasa.gov/callback_issues/cb_213.htm" target=_blank>http://asrs.arc.nasa.gov/callback_issues/cb_213.htm</a> Knock, Knock "Who's There?" The Captain. "The Captain Who?" The Captain who wants to get back into the cockpit: I left the cockpit for a minute, and on trying to r...

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by jsuen
Sun Jun 02, 2002 3:46 pm
Forum: Civil Aviation
Topic: Uniform Saftey Rules- Etops For Quads?
Replies: 11
Views: 1928

RE: Uniform Saftey Rules- Etops For Quads?

I didn't know Airbus had a problem with LROPS: http://www.airbus.com/pdfs/customer/fast28/lrops.pdf

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by jsuen
Sat May 25, 2002 2:40 pm
Forum: Technical/Operations
Topic: Hydrogen Powered Airbus
Replies: 28
Views: 3048

RE: Hydrogen Powered Airbus

No, since the hydrogen is compressed. Helium tanks for baloons don't go floating off...

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by jsuen
Fri May 24, 2002 8:45 am
Forum: Technical/Operations
Topic: Ducted Fan And Jet.
Replies: 38
Views: 4983

RE: Ducted Fan And Jet.

Actually, I think Jetpilot's statement is reverse. The way I'm familiar with it is that a fan creates a high pressure behind it, while a propeller accelerates air. Take, for example, a fan with a s-duct.

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by jsuen
Tue May 21, 2002 6:51 am
Forum: Technical/Operations
Topic: Fly-By-Wire?
Replies: 20
Views: 2227

RE: Fly-By-Wire?

SailorOrion,

The rudder on the A320, 330, 342 and 343 is mechanical. The FACs handle the yaw damping and travel limiter functions.

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by jsuen
Sat May 11, 2002 12:19 pm
Forum: Civil Aviation
Topic: Gas Station Owner Sues Over AA587
Replies: 20
Views: 2203

RE: Gas Station Owner Sues Over AA587

L-188, they should NEVER be a roadmap. In fact, I find it good that he sued before the report, not after. The moment the NTSB report becomes a roadmap, then people will start trying to defend themselves, perhaps by lying, giving incomplete information or otherwise obstructing a safety investigation....

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by jsuen
Fri May 10, 2002 7:48 am
Forum: Civil Aviation
Topic: Gas Station Owner Sues Over AA587
Replies: 20
Views: 2203

RE: Gas Station Owner Sues Over AA587

Once again, NTSB reports and conclusions are NOT admissible in a court of law. They recommend changes for safety and do not assign blame. There's no reason why he should wait for the NTSB investigation to finish if he's going to sue.

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by jsuen
Wed May 08, 2002 1:59 am
Forum: Technical/Operations
Topic: Would A Wireless LAN Affect Aircraft Systems?
Replies: 13
Views: 2407

RE: Would A Wireless LAN Affect Aircraft Systems?

I should have said 802.11b above. 802.11a uses a 5 GHz band.

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by jsuen
Wed May 08, 2002 1:55 am
Forum: Technical/Operations
Topic: Would A Wireless LAN Affect Aircraft Systems?
Replies: 13
Views: 2407

RE: Would A Wireless LAN Affect Aircraft Systems?

Answering the original question, Honeywell sells a 802.11 FHSS wireless LAN access point for aircraft use. 802.11 uses the exact same 2.4 GHz ISM band as microwave ovens. Since microwave ovens are already used in flight, and actually radiate much more energy than 802.11, there's not a problem.

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by jsuen
Fri May 03, 2002 1:42 am
Forum: Civil Aviation
Topic: Relatives Of Crash Sue AA, NOT Airbus!
Replies: 18
Views: 2328

RE: Relatives Of Crash Sue AA, NOT Airbus!

The final report doesn't matter legally. NTSB reports are not admissible in a court of law. They are for the sole purpose of improving safety, not assigning blame.

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by jsuen
Mon Apr 29, 2002 1:46 am
Forum: Technical/Operations
Topic: 'vortex' On Top Of The Wing?
Replies: 11
Views: 4175

RE: 'vortex' On Top Of The Wing?

It's what the caption says-- the shockwave as the air becomes locally supersonic over the wing. Remember that the airflow is faster over the top of the wing, causing pressure differential, and lift. As freestream velocity approaches Mach 1, the airflow above the wing exceeds M=1 and a normal shock a...

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by jsuen
Fri Apr 26, 2002 12:13 pm
Forum: Civil Aviation
Topic: Airfone
Replies: 7
Views: 1079

RE: Airfone

Those aren't Airfones. Airfone is a brand name of the GTE in-flight telephone system. As far as I know, GTE is not making changes.

Those phones are AT&T Wireless' In-flight phone system. AT&T is pulling out of the business, hence the deactivation of AT&T systems.

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