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Re: Trouble ahead
The pilots *should* be able to take over control from the autopilot.
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But the trend is toward less Taylorcraft BC12-D, more Boeing 737-MAX. Some talk of someday no pilots at all. I'm not worried either, especially if white hat guys are probing it before the black hats do. Statistically, I'm far more worried about driving to the grocery store. Especially given that I have flown exactly once in a past decade. Jerry, KE7ER On Sat, Oct 23, 2021 at 02:10 PM, Christopher Miller wrote: The pilots can always take over control from the autopilot. |
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Re: Trouble ahead
As a pilot I¡¯m not super worried about this. The pilots can always take over control from the autopilot. If they can¡¯t hand fly an aircraft they probably shouldn¡¯t be flying jets. On Sat, Oct 23, 2021 at 11:31 AM Jerry Gaffke via <jgaffke=[email protected]> wrote: Entertainment and flight control might share a common satellite internet connection. |
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Re: Trouble ahead
Regarding Chris Roberts of the Wired article, he looks to me like a very capable white hat hacker.
Hasn't been charged, has been living his life normally. ? ?? A hard read of the Wired article leaves it unclear exactly what he did: "He stated that he thereby caused one of the airplane engines to climb resulting in a lateral or sideways movement of the plane during one of these flights," FBI Special Agent Mark Hurley??(.pdf).?" "He told WIRED that he did access in-flight networks about 15 times during various flights but had not done anything beyond explore the networks and observe data traffic crossing them. According to the FBI affidavit, however, when he mentioned this to agents last February he told them that he also had briefly commandeered a plane during one of those flights." "That paragraph that¡¯s in there is one paragraph out of a lot of discussions, so there is context that is obviously missing which obviously I can¡¯t say anything about," He had been working with authorities to highlight these vulnerabilities for quite some time. It seems a facetious tweet to colleagues while in the air is what prompted his interrogation, he says he didn't tamper with anything on that flight. Perhaps the warrant refers to work he described while messing with a simulation back in his lab? Maybe he was working with the aircraft manufacturer at some point, not on a commercial flight? Perhaps the FBI agent stepped a bit beyond the truth in that statement to put pressure on him? Couldn't find any later news to clear up the discrepancies. Jerry, KE7ER |
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Re: Trouble ahead
Entertainment and flight control might share a common satellite internet connection.
These things are so complex these days that even a well designed system can have vulnerabilities. Trend has been to contract various software pieces out and fish for low bids, the resultant whole may not be well designed. Leaving default passwords and such suggests that nobody gave security much thought to begin with. Jerry, KE7ER |
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Re: Trouble ahead
On Fri, Oct 22, 2021 at 06:28 PM, Ken Hansen wrote:
Why would an airplane manufacturer tie their flight control system to their in-flight entertainment system?Even the wired story linked previously is kind of nebulous as to whether he actually controlled an engines thrust or just thought a movement of the plane at the moment was due to his commands sent. If it is true I would imagine the commands were sent to a frontend port of a flight control computer, not necessarily the busy buses that carry the raw real time control data between the flight computers and the components like engines. Just speculating, unless another report with more official in-depth information comes along.? Tom, wb6b |
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Re: Bitx40 Help Needed
The broadcast that you're hearing is just AM broadcast breaking through to the audio amplifier circuit, which is the LM386. It might even be making it through the rest of the receiver. It doesn't indicate anything special. What I'd recommend doing is tuning down to the 7.077 region to see if you can hear the FT8 signals. They're at 7.074 *upper* sideband, so if you tune to 7.077 you'll hear them on the *lower* sideband just fine. That will help you figure out if it is working. You can also use a Web SDR near you to listen to strong signals and see if you can tune them.?
Post pictures of your build so we can help more, and let us know how it goes :)? -- Ryan Flowers - W7RLF |
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Re: Trouble ahead
The judge wasnt too keen on the floppy. The accused hanged. It was a sad story overall. I suspect they got the wrong guy, it is best to drop this story for now. On Sat, Oct 23, 2021, 7:09 AM Ken Hansen <ken@...> wrote:
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Re: Trouble ahead
¿ªÔÆÌåÓýAnd it worked! The floppy was not lost. I have to assume that in this case they failed to staple the floppy on the outside of the disc inside (near the corners of the floppy)...Ken, N2VIP On Oct 22, 2021, at 19:12, Ashhar Farhan <farhanbox@...> wrote:
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Re: Trouble ahead
¿ªÔÆÌåÓýWhy would an airplane manufacturer tie their flight control system to their in-flight entertainment system?Do you really want flight control packets competing for bandwidth with streaming entertainment system packets? Ken, N2VIP On Oct 21, 2021, at 16:46, Jerry Gaffke via groups.io <jgaffke@...> wrote:
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Re: Trouble ahead
I was the technical witness in one of the most high profile terror cases on India. I was given the examine evidence, a floppy disk. Sadly, the diligent officers had stapled the floppy to the court papers along with other evidence! On Sat, Oct 23, 2021, 4:21 AM Niels Jalling <niels@...> wrote: Fairy tale written in 1837 by the great danish fairy tale writer Hans Christian Andersen. |
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Re: Trouble ahead
Hi,
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I was the young boy in that story - the one pointing at the nekkid emperor :) 73, Bill? KU8H bark less - wag more On 10/22/21 2:13 PM, Tom, wb6b wrote:
----snip-------- Maybe "The Emperor's New Clothes" should be read more widely. |
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Re: Trouble ahead
On Fri, Oct 22, 2021 at 07:17 AM, Jerry Gaffke wrote:
We also have some idiot governors:??I think we have entered an era where mass numbers of people in power (business leaders, government, politics) have such a sense of privilege where they can postulate anything and should not be questioned. Maybe "The Emperor's New Clothes" should be read more widely. Tom, wb6b |
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Re: Trouble ahead
That's why you should bring your software on an SSD! I know, not an option back in the days of SGI. These days you'd just put the software on a web site somewhere and download it after crossing the border, avoiding all potential customs issues. On Fri, Oct 22, 2021 at 1:14 PM Tom, wb6b <wb6b@...> wrote: On Fri, Oct 22, 2021 at 07:17 AM, Jerry Gaffke wrote: |
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Re: Trouble ahead
On Fri, Oct 22, 2021 at 07:17 AM, Jerry Gaffke wrote:
I was detained for hours back in the 80's coming back from Japan with some work related electronics gear (computer graphics).?When I worked for SGI one of the field reps posted the story, on the internal employee BB, of his recent trip to a customer location in a foreign country. He said when he arrived the first thing was a trip down an airport hallway with a guard at the far end, stationed behind a clear shield with a cutout and a machine gun protruding from it. Next was customs. He brought a hard drive loaded with software for the customer to do whatever system upgrades he was there to do. That flagged customs to pull him to a private room for interrogation. The customs office interrogated him with vigor and at length. Finally our rep convinced the customs official that it was OK to bring the drive into the country. At which point, the customs officer slammed the hard drive down as hard as he could onto the table and let our rep have the drive back. Field service can be fun. Tom, wb6b |
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Re: Trouble ahead
That sounds fun and educational, just be aware that the security guys here in the US can be real idiots.? I was detained for hours back in the 80's coming back from Japan with some work related electronics gear (computer graphics).? They had no clue, and were wondering what sort of atomic secrets (or whatever) I might have taken out of the country with me.? I think they just enjoyed breaking up the monotony by giving somebody a hard time.? The relatively sleepy Portland Oregon airport was far worse for this sort of thing than San Francisco.
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Here's a more recent example:?? We also have some idiot governors:?? Let's be careful out there! Jerry, KE7ER On Thu, Oct 21, 2021 at 06:09 PM, Ashhar Farhan wrote:
On my 2018 trip to Dayton, the flight entertainment system rebooted. I could see it was booting up in linux. I pressed on random buttons and it landed me in the admin login, there seemed to be no password. I wandered around a bit on the disk system, it was remote mounted and then I went back to my "Radio Porn" (flipping old QSTs on the laptop). |
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Re: EI9GQ 16 Watt Linear Amp Build
#homebrew
#linear-amp
Hi Don ,
Yes the stage will be a new stage after the IRF 510 in the homebrew rig.? This test was just to make sure that the transmit chain was working properly. I injected a signal into the RF amp (TX pre driver) and from there it goes to the 2N2219 driver stage, and then the IRF 510, and then on to the new final. ? I'm still tweaking the drive level and will finalize it when I integrate it with the full rig. On the bench I alternated between adjusting the drive level from the signal generator and the RF amplifier gain. The RD16 needs more drive than the 2N2219 stages could provide which is why I put the IRF510 back in the circuit.? ?I? backed off on the drive level until the IRF 510 stage was putting out about two watts. Dean |
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Re: HF Digital Voice Modulation modes
I think we'll need two steps (two NN), one for noise removal, and
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another for voice reconstruction. On 10/21/21 5:17 PM, Tom, wb6b wrote:
On Thu, Oct 21, 2021 at 06:30 AM, Rafael Diniz wrote: |
Shirley Dulcey KE1L
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