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...Jump to post
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...Jump to post
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 ...Jump to post
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...Jump to post
<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 ...Jump to post
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...Jump to post
><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...Jump to post
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...Jump to post
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...Jump to post
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 ...Jump to post
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...Jump to post
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...Jump to post
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.
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...Jump to post
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, ...Jump to post
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, ...Jump to post
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...Jump to post
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...Jump to post
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...Jump to post
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...Jump to post
Regarding cell phone detectors: they do exist and are routinely used on at least one Italian airline before takeoff.Jump to post
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...Jump to post
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...Jump to post
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.
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...Jump to post
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...Jump to post
I didn't know Airbus had a problem with LROPS: http://www.airbus.com/pdfs/customer/fast28/lrops.pdfJump to post
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....Jump to post
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.Jump to post
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...Jump to post