Well okay but if the pilot tries to maintain an attitude level with the ground (sea) and IAS is decreasing then the AOT will increase to the point where the wings stall.
How does the artificial horizon stay calibrated during cruise? Your real attitude changes as you follow the curvature of the Earth, so you must use the real horizon from time to time to recalibrate the gyros. Same as with a DG.
What is it about modern airliners that makes them so fragile?
ORLY? Have you done any flying over the south atlantic lately? I have been there in a ship and for me it was like the inside of a washing machine from the perspective of a bacterium.
Especially odd when most trans-oceanic flights offer calls(albeit at $10/minute) through seatback phones. It might well be, though, that the sort of conditions that cause aircraft to crash don't do much for reception...
Aircraft can send CPDLC messages though the ACARS link but they would usually only do this when they need to communicate with ATC. ACARS is expensive so crews are encouraged not to just use CPDLC to send messages which are not necessary. Once they had an emergency they would have focused on the flying and only communicated if it was going to help them in an immediate sense. We know the satellite links were working because ACARS was working.
I'd appreciate it if anyone who knows more about these things could comment on the viability of this and/or the technical limitations/challenges which I'm missing here.
I work on air traffic control software and ideas like this are being looked at. Aircraft transmit engineering data (among other things) through ACARS satellite links. Messages from this system provided a lot of information to the investigation. Cheaper data links have only recently become available. The turn around time for system design in aviation is very long. Designs are very detailed and rigorous. Integration issues on the aircraft would lengthen the time taken to implement a system such as you describe.
But yeah, it will happen, though probably not in the next few years.
In fact, this happens more often than you know and is a very typical response to a situation like this. Bottom line: loss of airspeed data should in no way shape or form be a catastrophic event.
There was that aircraft in the US which stalled in conditions with ice formation and the pilot pulled up rather than performing a stall recovery. Maybe pilots these days spent too much time programming the autopilot and not enough doing stick and rudder flying.
If Fox ever decides to finish The Simpsons I can't think of a better way than destroying Springfield with an earthquake, a tsunami and a meltdown, all in one episode.
Incidentally I wonder how these blimps would go if they were suspended entirely by hot air. The idea would be to use an envelope which traps heat. Hot air in the envelope generates lift. Should work well in a hot climate.
Take a radar as an example: the data is just a continuous stream of numbers coming in off the radar dish; but the algorithms that extract meaning from those numbers are very sophisticated. Using an OO language for problems like this is like trying to loosen a screw using a wrench - maybe you can make it work, but it's basically a really bad fit for the problem.
Funny you should use that example. I work on air traffic control software. A the front end you are exactly right. But downstream from the radar head there is a long chain of processing and the data becomes more abstract as you go along. The problem is how to transition from the flat signal processing model you describe to an OO model further down the chain and not create a bottle neck at the same time.
C++ may give you enough rope to hang yourself, but you are the one putting your head in the noose.
Not if you work for a large software company. Some idiot could use c++ to write incomprehensible code, then leave or be sacked. You get the job of maintaining the ever so clever rubbish he left behind.
I volunteered for a free software event. We were supposed to hand out Trisquel CDs and I did that but I also suggested people pick up a free copy of ubuntu from across the room and try that too.
Wikipedia gives 184 K (-89.2 C) as the coldest temperature on Earth and I suppose people would walk around with just very warm clothing on at that temperature. For a while, anyway. So my point (if I have one) is that while 93K sounds cold its actually not beyond possibility that a person could walk around on Titan with a bottle of oxygen and some well insulated clothing. Heated boots would be a good idea. Wear mittens, not gloves.
You also need one other critical component: heat. Considering the temperature on Titan is somewhere around -179C, fires aren't going to break out any time soon.
Slashdot Mirror
Remember this kids: always use a proper database for your crap encryption scheme.
Well okay but if the pilot tries to maintain an attitude level with the ground (sea) and IAS is decreasing then the AOT will increase to the point where the wings stall.
How does the artificial horizon stay calibrated during cruise? Your real attitude changes as you follow the curvature of the Earth, so you must use the real horizon from time to time to recalibrate the gyros. Same as with a DG.
And if flight 447 would have had an experienced pilot like Chesley "Sully" Sullenberger on board, they probably would have made it.
Sullenberger is a stick and rudder man. Flies gliders and light aircraft. Modern pilots are data entry operators.
What is it about modern airliners that makes them so fragile?
ORLY? Have you done any flying over the south atlantic lately? I have been there in a ship and for me it was like the inside of a washing machine from the perspective of a bacterium.
Especially odd when most trans-oceanic flights offer calls(albeit at $10/minute) through seatback phones. It might well be, though, that the sort of conditions that cause aircraft to crash don't do much for reception...
Aircraft can send CPDLC messages though the ACARS link but they would usually only do this when they need to communicate with ATC. ACARS is expensive so crews are encouraged not to just use CPDLC to send messages which are not necessary. Once they had an emergency they would have focused on the flying and only communicated if it was going to help them in an immediate sense. We know the satellite links were working because ACARS was working.
I'd appreciate it if anyone who knows more about these things could comment on the viability of this and/or the technical limitations/challenges which I'm missing here.
I work on air traffic control software and ideas like this are being looked at. Aircraft transmit engineering data (among other things) through ACARS satellite links. Messages from this system provided a lot of information to the investigation. Cheaper data links have only recently become available. The turn around time for system design in aviation is very long. Designs are very detailed and rigorous. Integration issues on the aircraft would lengthen the time taken to implement a system such as you describe.
But yeah, it will happen, though probably not in the next few years.
(but instead broke up the plane due to severe overspeed).
Debris recovered from the water showed that the aircraft hit the water flying flat and level so it was likely to have been intact at that point.
In fact, this happens more often than you know and is a very typical response to a situation like this. Bottom line: loss of airspeed data should in no way shape or form be a catastrophic event.
There was that aircraft in the US which stalled in conditions with ice formation and the pilot pulled up rather than performing a stall recovery. Maybe pilots these days spent too much time programming the autopilot and not enough doing stick and rudder flying.
If the issue is ice formation then venting exhaust from the turbofan over the airspeed sensor/pilot tube would go a long way to addressing it.
Pitot tubes are little things located well away from the engines. They are however electrically heated, though heating can be offset by extreme cold.
If Fox ever decides to finish The Simpsons I can't think of a better way than destroying Springfield with an earthquake, a tsunami and a meltdown, all in one episode.
More like the Diamond Age to me.
Incidentally I wonder how these blimps would go if they were suspended entirely by hot air. The idea would be to use an envelope which traps heat. Hot air in the envelope generates lift. Should work well in a hot climate.
That reminds me of something.
Also pocket calculators are no use when teaching arithmetic to young school children.
Take a radar as an example: the data is just a continuous stream of numbers coming in off the radar dish; but the algorithms that extract meaning from those numbers are very sophisticated. Using an OO language for problems like this is like trying to loosen a screw using a wrench - maybe you can make it work, but it's basically a really bad fit for the problem.
Funny you should use that example. I work on air traffic control software. A the front end you are exactly right. But downstream from the radar head there is a long chain of processing and the data becomes more abstract as you go along. The problem is how to transition from the flat signal processing model you describe to an OO model further down the chain and not create a bottle neck at the same time.
most porting operation leads to stupid bugs or behavior like that.
Who ports these days? Java is more portable by virtue of the VM. C is more portable by virtue of its simplicity.
C++ may give you enough rope to hang yourself, but you are the one putting your head in the noose.
Not if you work for a large software company. Some idiot could use c++ to write incomprehensible code, then leave or be sacked. You get the job of maintaining the ever so clever rubbish he left behind.
So OSX is Max's V8 Interceptor? Sort of makes sense. It is expensive to run and only does one or two things well. Minix must be the gyrocopter.
of the Iranian CA breach?
If they know that certain governments are decrypting SSL
I don't think they need to decrypt SSL. Just proxy the key negotiation.
Sure but I would recommend ubuntu for a non-technical person. Its not going to further the goals of free software to give them Trisquel.
I volunteered for a free software event. We were supposed to hand out Trisquel CDs and I did that but I also suggested people pick up a free copy of ubuntu from across the room and try that too.
Err, Titan and Saturn are in rotational/ orbital resonance?
I think its pretty clear. Ignoring issues of sidereal motion, the sun goes around the sky on Titan in the same time as Titan orbits Saturn.
As I discovered trying to light a camp fire at 5000 feet..
Wikipedia gives 184 K (-89.2 C) as the coldest temperature on Earth and I suppose people would walk around with just very warm clothing on at that temperature. For a while, anyway. So my point (if I have one) is that while 93K sounds cold its actually not beyond possibility that a person could walk around on Titan with a bottle of oxygen and some well insulated clothing. Heated boots would be a good idea. Wear mittens, not gloves.
You also need one other critical component: heat. Considering the temperature on Titan is somewhere around -179C, fires aren't going to break out any time soon.
No but they would have when Titan was forming.