Wow, that's fast! - Page 3

Chris31 · 01-31-2006, 01:31 AM

Quote: Originally Posted by scott_fx

after doing a little research, there is *SOME* validity to this:

but there are a bunch of other factors involved. here is the reference article:
http://www.wirednews.com/news/cultur...,41177,00.html

Nice info there.

I highly doubt they will allow the use of mobile phone, probably in the future they might.

But question though, would you get any signal inside the plane when using your own phone?

scott_fx · 01-31-2006, 02:07 AM

Quote: Originally Posted by Chris31

Nice info there.

I highly doubt they will allow the use of mobile phone, probably in the future they might.

But question though, would you get any signal inside the plane when using your own phone?

it's funny how this thread turned sooo badly sooo quickly

but to your question, i recall watching a broadcast in which a reporter called his station when he was on a highjacked 747 (or similar) plane.

Matthue · 01-31-2006, 03:32 PM

Mobile phones release massive amounts of EMI when negotiating the cell phone networks. Put your phone about 2M or more from some speakers.. when the phone is doing this you will hear the speakers sound bip-de-de-bip-de-de-bip.. This is the massive EMI being induced on the speakers making the cone magnets in the speakers moving in and out making that noise.

When you are sitting in your seat and your phone does this it emmits EMI everwhere in the passenger area, perhaps inducing electrical signals on some plane electronic wires in the side or ceiling dealing with plane flight functions.

Thats something you dont want to f**k with i.m.o.

People say GPS devices are only receiving signals, thats fine but remember EMI/EMF is/are so unpredictable (especially when devices are not shielded properly) you could have a device with an unknown fault causing many watts of EMI and you would not know it while you are sitting there with a smug look on your face thinking you have managed to get away with it.

Perhaps watching some endorsed plane crash videos and respecting rules as rules is the answer.

Chris31 · 01-31-2006, 10:49 PM

Quote: Originally Posted by Matthue

Mobile phones release massive amounts of EMI when negotiating the cell phone networks. Put your phone about 2M or more from some speakers.. when the phone is doing this you will hear the speakers sound bip-de-de-bip-de-de-bip.. This is the massive EMI being induced on the speakers making the cone magnets in the speakers moving in and out making that noise.

When you are sitting in your seat and your phone does this it emmits EMI everwhere in the passenger area, perhaps inducing electrical signals on some plane electronic wires in the side or ceiling dealing with plane flight functions.

Thats something you dont want to f**k with i.m.o.

People say GPS devices are only receiving signals, thats fine but remember EMI/EMF is/are so unpredictable (especially when devices are not shielded properly) you could have a device with an unknown fault causing many watts of EMI and you would not know it while you are sitting there with a smug look on your face thinking you have managed to get away with it.

Perhaps watching some endorsed plane crash videos and respecting rules as rules is the answer.

You see...some guys are proud of their stupidity, I guess they cant help it

Goofus · 02-01-2006, 08:41 AM

The whole "shut everything down during takeoff and landing" has nothing to do with electronic interference. It's about forcing people to pay attention and sit in an orderly fashion to be ready for a quick evacuation. If there were really any type of risk during takeoff, do you think the risk would somehow disappear during level flight? I think it's all pointless BS so I always listen to my mp3 player during the safety announcments. It's all crap I've heard and now Delta is even screaming advertisements for some credit card during the announcements, so that's even more reason to tune it out.

BTW, has anyone seen a cell phone ever even get a connection during flight? What about the 20+ available network connections I see on my laptop
during a flight? I'm assuming these are other people who haven't shut off their wireless transmitter. That seems more likely to cause interference than a cell phone.

amthar · 02-01-2006, 10:45 AM

Quote: Originally Posted by Goofus

The whole "shut everything down during takeoff and landing" has nothing to do with electronic interference. It's about forcing people to pay attention and sit in an orderly fashion to be ready for a quick evacuation. If there were really any type of risk during takeoff, do you think the risk would somehow disappear during level flight? I think it's all pointless BS so I always listen to my mp3 player during the safety announcments. It's all crap I've heard and now Delta is even screaming advertisements for some credit card during the announcements, so that's even more reason to tune it out.

BTW, has anyone seen a cell phone ever even get a connection during flight? What about the 20+ available network connections I see on my laptop
during a flight? I'm assuming these are other people who haven't shut off their wireless transmitter. That seems more likely to cause interference than a cell phone.

Thank you! I was reading through the post and was hoping someone would say this. It's about crowd control. They want everyone to be paying attention to them as they describe how to save your *** if there is a problem. And it's for legal reasons: if you are listening to your music and can't hear that your seat is a floatation device (for example), with our wonderful society these days you could probably win the lawsuit.

Once you are in the air, you can turn on most of these devices because if you don't hear the info about drinks being served or delays, etc, who cares.

So why do they tell you to keep your cell phone off the entire time? First off, if you have ever broken the "rule" you will quickly learn that at 30,000+ feet you don't get a signal anyways. I was actually told by a Boeing Engineer (works in the Missouri location) why they do this. It is for when you are in your takeoff and decent. Cell phones are just that, phone that work in cells. As you drive down the road you jump from cell to cell. They were designed with the idea that people would be going at car speeds... not the speeds reached by airplanes during takeoff and decent. Your phone, going at 200+ mph (I don't know the actual speeds obtained by a plane when they are within signal range of the cell towers) jumping from cell to cell freaks out the network. What exactly "freaking out" is I don't know, neither did he as he was a Boeing engineer and not a cell engineer. Still, I like this reason the best.

Chris31 · 02-01-2006, 12:56 PM

But some of the guys here are missing the points.

Just because one think its safe to do so, or it is safe it doesnt mean he can break the rules.

You are driving along on a motorway, side to side with the police. Would you speed up? or would you stick to the speed limit? If you were stop, would you argue and say, "But officer its early in the morning, the road is straight, dry and no one else is around, Im also a racing driver. So I reckon you shouldnt be booking me for this."

True, the speed is not neccessarily a danger, providing the condition is right. But if you were told not to speed up, then dont.

You go and insist that everyone can use the phone safely oboard to the officials because your friend told you its safe to do so and hes an engineer...see what the official got to say about that.

Even if you were told its not allowed you just proudly use the phone anyway...deliberately ignoring orders.

So anyone got the balls to do this? Please hands up

Sid3ways S13 · 02-06-2006, 05:44 PM

Quote: Originally Posted by Matthue

Basiclly the thing I have found out is you need to ask the pilot, if he doesnt have much technical knowledge on how GPS device work he will more than likely say no.

If you encounter a commercial airline pilot that has gotten that far in his pilot's liscense program and doesn't know how GPS works, he is a terrorist. Don't get on that plane.

xBrady · 02-06-2006, 09:40 PM

Quote: Originally Posted by Sid3ways S13

If you encounter a commercial airline pilot that has gotten that far in his pilot's liscense program and doesn't know how GPS works, he is a terrorist. Don't get on that plane.

True.

DaPCWiz · 02-07-2006, 03:47 PM

my GPS did that the other day... showed me at like 160-something mph when I was parked inside a parking deck

JC-S60 · 02-07-2006, 04:27 PM

Quote: Originally Posted by Matthue

Mobile phones release massive amounts of EMI when negotiating the cell phone networks. Put your phone about 2M or more from some speakers.. when the phone is doing this you will hear the speakers sound bip-de-de-bip-de-de-bip.. This is the massive EMI being induced on the speakers making the cone magnets in the speakers moving in and out making that noise.

Mouhahaha

In fact, try that with a non-connected speaker and you will get nothing.

It's just the signal picked up by the amplifier, and well, eh, amplified. So the "massive EMI" isn't that massive...at all.

If it were that badly shielded, I would never get on an airplane

Wiredwrx · 02-07-2006, 05:02 PM

Quote: Originally Posted by Matthue

Theres so many disconceptions on this board about GPS and windshields/windscreens, GPS signals dont mind glass at all its metal that will deflect a radio signal and cause a weak signal.

Just to confirm, you meant misconceptions right? You seem to have a misconception also. Any seperation is a seperation. Some seperations are more detrimental, but even paper is seperation. Just because you can see through it doesn't mean that signals penetrate it as easily as if it was not there.

Yes, metal is more reflective of RF energy, but even glass reflects RF.

Michael

Wiredwrx · 02-07-2006, 05:05 PM

Quote: Originally Posted by grimor2000

ehhh, we use GPS in the plane all the time.... but we fly KC-135R's

Sounds like fun.

d2.n · 02-07-2006, 06:55 PM

really about common courtesy. technologically mobile phone use inflight is not a problem, providers have met with airlines to implement "towers" on plane to overcome the cell switching issue (search verizon and virgin i think).
200+ converstation (at high volume to overcome the engine drone) would make you wish for just a crying baby.

Similarly regarding courtesy, gps tracking in flight may make other passeengers very uncomfortable. I would never have an open laptop tracking the plane real time (i avoid getting out of my seat), even reasonable people are scared of terrorism, even if irrational. i see no reason to make other more uncomfortbale, maybe not an issue for "low risk" profiled passengers.

an issue for wifi too, few airlines are offering it now, but it scares alot of people

Scouse Monkey · 02-07-2006, 07:05 PM

Quote: Originally Posted by JC-S60

Mouhahaha

In fact, try that with a non-connected speaker and you will get nothing.

It's just the signal picked up by the amplifier, and well, eh, amplified. So the "massive EMI" isn't that massive...at all.

If it were that badly shielded, I would never get on an airplane

as for GPS use on a plane..it is also more of a terrorism thing. Terrorists could use GPS to decide when to take over a plane or when to detonate a bomb or to find a building to crash into when they have take in over, therefore GPS use is also resticted to keep tabs on this.