AFAIK it actually takes a naked flame to ignite petrol, the glowing end of a cigarette can not do this, correct me if i'm wrong though
It would depend on how hot the end of the cigarette was, surely.
If its "bad" to turn on cameras during takeoff & landing why is YouTube FULL of vids about them?
- Thread starter KatanaDV20
- Start date
It would depend on how hot the end of the cigarette was, surely.
- Joined
- 17 Apr 2006
- Posts
- 3,165
- Location
- 3rd rock...
I totally agree that no passenger should be allowed to mess about when it comes to watching the cabin safety briefing. After all - it could save your life.
People should have headphones yanked out if they are not paying attention to important stuff like that. We all know the person seated by the emergency exits will be needed to pop those doors open if the time comes - you wanna trust your life to some loser who keeps his headphones on and doesn't care about how the door operates?
Then you get those arrogant buisinessmen who have "travelled thousands of times" and "have more flight time than the pilots" so they "know it all". These are the goons to watch out for because most likely they are the morons who will inflate their life jackets while still IN the plane or run the wrong way to an exit (when theres one right behind them)..because they dont pay attention.
For THESE sort of things no mercy should be shown but I see no harm in filming out the window TBH!
People should have headphones yanked out if they are not paying attention to important stuff like that. We all know the person seated by the emergency exits will be needed to pop those doors open if the time comes - you wanna trust your life to some loser who keeps his headphones on and doesn't care about how the door operates?
Then you get those arrogant buisinessmen who have "travelled thousands of times" and "have more flight time than the pilots" so they "know it all". These are the goons to watch out for because most likely they are the morons who will inflate their life jackets while still IN the plane or run the wrong way to an exit (when theres one right behind them)..because they dont pay attention.
For THESE sort of things no mercy should be shown but I see no harm in filming out the window TBH!
Because people don't want the flight controls to possibly be affected even if there's only a 2% chance.
I don't want to crash just because you have to act like a immature 12 year old typical middle aged crisis male who MUST film everything. I bet you run around the house filming your wife washing dishes and your kids watching TV as well.
I don't want to crash just because you have to act like a immature 12 year old typical middle aged crisis male who MUST film everything. I bet you run around the house filming your wife washing dishes and your kids watching TV as well.
- Joined
- 17 Apr 2006
- Posts
- 3,165
- Location
- 3rd rock...
Yea I know - and the signs are very clear as well. Nice big diagrams. But the FA always asks the person if he/she is prepared to help in emergency. And if they say "no" they are seated somewhere else.
What I was getting at is - you feel a little safer when you see the person seated there looking at the door...noting the signs...reading the leaflet etc. I saw a woman doing this once and its so good to see. She was mentally already getting ready in case ___ hit the fan.
On the other hand you see other people just nodding and going back to their book.
Ok FIRSTLY,
Using a Camera to take pictures or take a video is perfectly fine, its not going to cause any interference or anything to the aircraft, Its just for your own safety just incase something bad happens.
I film and take pictures ALL the time you just have to hide the camera from them, they ALWAYS sit down as the plane is about to take off or land so its not hard to do it at all.
Using a Camera to take pictures or take a video is perfectly fine, its not going to cause any interference or anything to the aircraft, Its just for your own safety just incase something bad happens.
I film and take pictures ALL the time you just have to hide the camera from them, they ALWAYS sit down as the plane is about to take off or land so its not hard to do it at all.
No. the doors retract inwards before hinging open, when the aircraft is at altitude the cabin has significantly higher pressure than the external atmosphere, making opening the door practically impossible.
- Joined
- 17 Apr 2006
- Posts
- 3,165
- Location
- 3rd rock...
You cannot ever open the doors in flight. Next time you fly take a look at the open door as you walk in. You will notice its designed like a plug. If you can - watch them shut it. It swings around...swings in...slides a bit and then clicks out again sitting tight against the cabin wall. You hear the dull thunks as the locks engage.
Cabin pressure will keep the doors shut. Imagine several elephants pressed up against the doors (and the sides of the cabin) in flight..all pushing outwards..and you get the idea (ok bad example but trying to explain the outward-acting pressure lol)
On military planes that CAN pop the doors in flight they de-pressurize the cabin first.
Cabin pressure will keep the doors shut. Imagine several elephants pressed up against the doors (and the sides of the cabin) in flight..all pushing outwards..and you get the idea (ok bad example but trying to explain the outward-acting pressure lol)
On military planes that CAN pop the doors in flight they de-pressurize the cabin first.
Soldato
- Joined
- 13 Jul 2006
- Posts
- 3,371
- Location
- Hell!! \m/
Mobile phones/wifis may interfer with some of the air comm.? As for landing/taking off it's satety - desk thing up, etc.
Not entirely sure, however I saw something like Mythbusters a few years back where they tried to ignite different fuels with glowing cigarettes, virtually none of them lit with the exception of some crazy highly combustible fuel.
I am going on long ago drunken memory though
Its due to the possibility of the camera flying around the cabin and causing injury should the landing/take off be rough. Seems to be no consistancy to it tho, sometimes on the smaller jets I've been on i.e. Bristol<>Amsterdam FAs have been telling everyone to stow phones, cameras even drinks sometimes, other times they've not bothered.
Quick calculation,
A 767 usually keeps the cabin pressure at that of 2,100m (785mbar) while cruising at 12,000m (193mbar), meaning the interior of the cabin is 592mbar higher in pressure than the outside.
This roughly equates to an outward-pressure of 8.6 pounds per square inch.
Now, the size of the entry-doors on a 767 is roughly 42" x 74", giving a total surface area of roughly 3,108 Square inches, meaning that the total force required to overcome the cabin pressure and retract the doors for opening is 26,728.8 pounds, or more than twelve tonnes
A 767 usually keeps the cabin pressure at that of 2,100m (785mbar) while cruising at 12,000m (193mbar), meaning the interior of the cabin is 592mbar higher in pressure than the outside.
This roughly equates to an outward-pressure of 8.6 pounds per square inch.
Now, the size of the entry-doors on a 767 is roughly 42" x 74", giving a total surface area of roughly 3,108 Square inches, meaning that the total force required to overcome the cabin pressure and retract the doors for opening is 26,728.8 pounds, or more than twelve tonnes
Soldato
- Joined
- 4 Aug 2007
- Posts
- 22,436
- Location
- Wilds of suffolk
Plus of course shoulder straps are a nasty trip hazard. Thats the reason they say you cant use the blankets etc whilst taking off and landing.
I do get seriously ****ed at people who cannot follow instructions. IMO its quite simple you book a flight with a carrier and accept their terms, you dont only accept the terms you agree with.
IMO they should stamp peoples passports who refuse to follow the instructions then apply an extra charge when they idiots book themselves in at the airport.
Right, lots of misinformation flying (no pun intended!) around this thread so lets set some things straight.
1. Mobile phones are not allowed in flight for a number of reasons. You've all heard the interference a phone signal causes on your speakers, imagine the interference caused by 180 mobile phones all trying to search for a signal. As I understand it whilst they are searching for signals they are at the highest RF output, hence when airlines have a base station onboard the signals are all low power (someone feel free to correct me). These signals can slightly affect the aircraft. For a start we can hear the very same interference on our radio communications as you can on your speakers and on a busy ATC freq its not good!
Another issue is to do with the mobile phone networks. These are designed for phones to be moving around on the ground, the base stations are laid out so that they slightly overlap and so you can move from one to another easily. At any one time your phone can only see a handful of base stations and the network just switches easily. As soon as you increase the altitude of the phone then it can see a huge amount of base stations and the system can get over loaded trying to switch between the different stations. I had a letter from O2 back when I had a PPL asking me to NOT use my phone in an aircraft as it overloaded there systems.
2. Electronic devices. These aren't allowed on during take off and landing for 2 reasons. Its not about interference. The main reason is that take-off and landing are the two most hazardous phases of flight. In a worst case scenario and the aircraft crashes you don't want to have 100+ cameras/phones/laptops becoming projectiles flying around the cabin. Most are fairly weighty and they would kill people when involved in that kind of accident. The 2nd reason as people have mentioned is to keep the passengers attention, so that if you DO need to evacuate then you're a little more switched on. Every second counts. This is also the reason why at night the cabin lights are dimmed for take-off and landing. It means that if you do have to evacuate the aircraft you will have at least a little bit of night-vision to help evacuate yourselfs when the power goes out. The window blinds are also all opened so the crew can look outside of the aircraft and see where is a safe place to lead passengers. If an engine is on fire its probably a good idea to evacuate out the OTHER side of the aircraft
1. Mobile phones are not allowed in flight for a number of reasons. You've all heard the interference a phone signal causes on your speakers, imagine the interference caused by 180 mobile phones all trying to search for a signal. As I understand it whilst they are searching for signals they are at the highest RF output, hence when airlines have a base station onboard the signals are all low power (someone feel free to correct me). These signals can slightly affect the aircraft. For a start we can hear the very same interference on our radio communications as you can on your speakers and on a busy ATC freq its not good!
Another issue is to do with the mobile phone networks. These are designed for phones to be moving around on the ground, the base stations are laid out so that they slightly overlap and so you can move from one to another easily. At any one time your phone can only see a handful of base stations and the network just switches easily. As soon as you increase the altitude of the phone then it can see a huge amount of base stations and the system can get over loaded trying to switch between the different stations. I had a letter from O2 back when I had a PPL asking me to NOT use my phone in an aircraft as it overloaded there systems.
2. Electronic devices. These aren't allowed on during take off and landing for 2 reasons. Its not about interference. The main reason is that take-off and landing are the two most hazardous phases of flight. In a worst case scenario and the aircraft crashes you don't want to have 100+ cameras/phones/laptops becoming projectiles flying around the cabin. Most are fairly weighty and they would kill people when involved in that kind of accident. The 2nd reason as people have mentioned is to keep the passengers attention, so that if you DO need to evacuate then you're a little more switched on. Every second counts. This is also the reason why at night the cabin lights are dimmed for take-off and landing. It means that if you do have to evacuate the aircraft you will have at least a little bit of night-vision to help evacuate yourselfs when the power goes out. The window blinds are also all opened so the crew can look outside of the aircraft and see where is a safe place to lead passengers. If an engine is on fire its probably a good idea to evacuate out the OTHER side of the aircraft
Quick calculation,
A 767 usually keeps the cabin pressure at that of 2,100m (785mbar) while cruising at 12,000m (193mbar), meaning the interior of the cabin is 592mbar higher in pressure than the outside.
This roughly equates to an outward-pressure of 8.6 pounds per square inch.
Now, the size of the entry-doors on a 767 is roughly 42" x 74", giving a total surface area of roughly 3,108 Square inches, meaning that the total force required to overcome the cabin pressure and retract the doors for opening is 26,728.8 pounds, or more than twelve tonnes
Well I can confirm the average PSI inside an A320 is 8.2, as you say with that pressure it is impossible to open any of the doors.
Quick calculation,
A 767 usually keeps the cabin pressure at that of 2,100m (785mbar) while cruising at 12,000m (193mbar), meaning the interior of the cabin is 592mbar higher in pressure than the outside.
This roughly equates to an outward-pressure of 8.6 pounds per square inch.
Now, the size of the entry-doors on a 767 is roughly 42" x 74", giving a total surface area of roughly 3,108 Square inches, meaning that the total force required to overcome the cabin pressure and retract the doors for opening is 26,728.8 pounds, or more than twelve tonnes
This is one of the most impressive posts I've seen in a long while!
Good work Sir!
- Joined
- 17 Apr 2006
- Posts
- 3,165
- Location
- 3rd rock...
Quick calculation,
A 767 usually keeps the cabin pressure at that of 2,100m (785mbar) while cruising at 12,000m (193mbar), meaning the interior of the cabin is 592mbar higher in pressure than the outside.
This roughly equates to an outward-pressure of 8.6 pounds per square inch.
Now, the size of the entry-doors on a 767 is roughly 42" x 74", giving a total surface area of roughly 3,108 Square inches, meaning that the total force required to overcome the cabin pressure and retract the doors for opening is 26,728.8 pounds, or more than twelve tonnes
Woot! OcUK has a math whiz
But for real dude - thats a neat calc you got there!