307 posts • joined 19 Mar 2012
In umeris gigantium
(on the shoulders of giants)
Fortuna faveat, bibentes
(fortune favours those who drink)
sertinyay levercay atinlay unpay hereyay
Igpay atinlay otway tarsyay
Re: to the pub
I think its supposed to be a derivative from the "our Father" prayer. More correct then would be: "Sicut inter sidera et in taberna". Between the stars as (it is) in the pub. It seems incorrect because there is a bit of sentence missing, where the implied "it is" comes from. I don't really know how to fix that without making it a rather lengthy sentence. Plus my latin is a little rusty. I last translated anything about 7 years ago.
Edit: also, it should be taberna at least. I think Caupona would be better suited in meaning (inn, tavern, canteen. More fitting of the meaning of a pub) but less recognizable by those not learned on the dark arts of Latin.
No better boffins
than German boffins in a lot of areas of expertise. I congratulate LOHAN on snatching up a fine example!
I'll make mine an Erdinger.
Re: Time delay
Depending on what they are monitoring probably a mix of both. "As received data" and "predicted real time" predicting the most likely real time values based on the delayed data.
Re: Ministry of Truth demand more LIES....
While we ARE getting lied to about many things, most data simply DOES point to changing weather patterns over the last few decades. Whether this is natural or influenced (and to what degree) by mankind is less clear cut because of the dense overgrowth of "greenie" sponsored BS "research" in that area.
Not really surprised
"locking screws, components and polished appearance", meaning exactly what cheap and readily available automation systems do.
Automation takes an investment (plus a lot of time investment in development of product specific tooling and programming) that needs to pay back. Such an investment is only worth it if the cost of labor is significantly more than the depreciation of the equipment used. The labour for Foxconn is currently still cheap enough that significant investments in automation systems are just not worth it.
The main reason for the investment in "Foxbots" now is probably more about quality than about labour costs. (Robots tend not to leave fingerprints, smudges and scratches on parts like meatbag workers tend to do)
Look at what most growing companies in the western world goes through when growing. It starts of producing small numbers of parts with significant portions of manual labour. As labour cost per product starts rising, more automation is introduced. Until a point is reached where a significant portion, if not all, production is automated. Labour cost is the most significant driver behind automation. Foxconn has access to cheap labour, so has little drive to automate right now. If pay per hour keeps rising, more automation will be needed to stay competitive.
Re: I've posted a rant here before
@Chris lively, I'd agree with you except for the simple fact that anyone who doesn't know airspace structures would also not know where airlanes and airports are. (Not to mention the existence of low-flying transit routes for military jets, forbidden airspaces, etc)
@Cynic_999, basically the same region. Anyone who doesn't know airspace won't know where those takeoff/landing areas are. Thus they shouldn't be flying that high. (Add to that the fact there is VERY little reason for a normal powered model to go that high. I can understand a larger span glider model getting extra altitude, but I would like the pilot to know where he is flying with regards to other traffic.
I've posted a rant here before
so I'll just keep it short.
I'm a pilot. I have a piece of paper that shows I know airspace structures and where I can and cannot operate an air vehicle.
Anyone operating anything (remote or otherwise) over 200 feet altitude (I think 400 is WAY too generous already) should IMHO be able to show a similar piece of paper.
is an autopilot? 3-dof leveling, 6-dof stabilisation, altitude hold, speed hold, gps guidance, enroute reprogrammable?
Dont reinvent, just start making new 3310s as is. I'd buy one in a heartbeat
Re: Looking good
Additional question: The TTL converter is just hanging in free space from the USB connector atm? Will it receive some additional support in the "up and down" direction? Because as it is currently sitting, it'll put a lot of stress on the solder joints for the usb connectors on the PitS and converter board. And from experience, solder joints are NOT structural. (Especially the bonding of the copper trace to the board is prone to breaking loose from vibration induced stresses.)
I am however slightly worried with the USB to TTL converter and especially the wires from there to the pixhawk dangling out the back, just begging to slide out when that rocket motor gives LOHAN a mighty thrust up the rear end. Shirley they will be affixed somehow right?
Re: Packing chutes is not always easy
On the main engine burn video you can actually see the balloon cross the view at 29-30 seconds in. Considering the test vehicle has been moving away at close to mach 2 by that point thats a pretty impressively sized balloon!
Packing chutes is not always easy
Packing a regular chute is not THAT hard. Packing an emergency chute takes some added effort and care (they are folded differently from the "standard" and being the ONLY chute in the pack it better come out right the first time. And fast). I can imagine folding a giant hypersonic parachute is not an easy feat. One wrong loop in the risers and you're shit out of luck.
My hats off to the NASA boys for pulling this off. I'm also impressed at how fast they manage to kill the stabilising rotation after the motor burn.
Edited for Splelling
Re: What about those black-box locator pings?
The pings detected were of the wrong frequency. And with a frequency offset that makes it likely it was coming from the detection equipment itself (possibly echoing off the seafloor) If I remember correctly the frequency was such that adding a real ping and the signal together would produce an audible tone.
Re: What happened to GAGA
ahh, missed the bootnote there. Thanks.
What happened to GAGA
We haven't had an update since 2012
"As with all of our Surface products, Surface Pro 3 is engineered with high-quality components to be as thin, light and powerful as possible and is designed to be serviced by professionals."
Read: Chucked in the bin behind the counter and handing the customer a new box from the shelf if it's physically damaged. (Cheaper for the company than actually training hundreds of staff to perform tedious and time consuming repairs. In worker hours alone a replacement would be cheaper)
Re: First stage
The first stage of the rocket now on the pad does seem to have the foldy legs. So I suspect they will.
Next launch attempt is tomorrow (The 24th of June)
I doubt flow around the craft is going to be very laminar at all.
I hope you have used it on those grub screws. Those tiny little screws tend to easily shake loose, allowing the rod to slide. Which will probabably put you into a spin pretty fast.
PS: Something I just thought of, since this already a project of epic proportions with massive amounts of gadget-o-gasms and it will be known where LOHAN comes down. How about filming the launch and landing from the air with one of them quad/hex/octo-copters? That should give some pretty cool footage.
Re: Google Balloon Recovery Officer
A G-BRO? I think we have enough of those already...
Re: We're finally there...
Only 2 things are infinite, the universe and human stupidity. And we're not fully sure on the universe.
I feel all dirty now, for getting in on the action. Excuse me while I go take a shower.
Communication by pliers
With sufficient conviction, one might be able to communicate by hole punch and paper tape.
Having the data and modeling something in a proper CAD environment and then modeling the same thing in Planemaker are 2 entirely different things entirely. Planemaker is not what you would call easy to use if you are used to CAD programs. (Which is also why I won't offer my "services". I would not want to inflict such abbomination as would result on the world)
I hope El Reg wil keep us updated on launch plans as always?
a good friday
A classic BOFH tale was all i needed to make this an excellent day!
Stock is getting limited because the US is dumping its reserves. We're not actually running out (yet).
I think the use of hydrogen for a project of this magnitude has to do with the cost of failure/premature ignition. Eliminating a hydrogen explosion as a factor is probably a big one in an FMEA.
And another bust...
Cancelled for today too. http://www.nasa.gov/mission_pages/tdm/ldsd/
Re: Return home ?
Return home is intended for when you go out of radio range. Not really for when you are silly enough to ignore all standard practices and fly your quad out of direct Line of Sight, behind a tall building.
They have intelligent motor controllers which stop ALL the motors the instant one of them hits something. You may get a minor cut but lopping fingers off??? No..."
Yeah... You try sticking your fingers into a decent size quadcopter and say that again. Remember those blades are spinning at several thousand RPM. They don't stop fast. Even my dinky little toy quad gives a serious sting if you stick your fingers into the props. A larger quad COULD lob off fingers. (And not all motor controllers are that intelligent anyway)
Was the servo hooked up to the control board and actively being "instructed"? Perhaps the PID algorithms need some tinkering and are overstimulating the servo with very small adjustments. (I'd suggest putting in an averaging period buffer on the output). This could quickly overheat the motor since it's constantly getting instructed to move one way, then the other. This can be heard as (possibly quite soft) buzzing or rattling coming from the servo.
You don't have to hit the pilots eye. refraction on the windscreen and illumination of the interior is enough to degrade night vision acuity.
Re: @ imanidiot
"Another, even more extreme, apples vs oranges comparison.
If you would pull your head out of your ass and start looking at some of the research on this matter you might notice that this is pretty much the same effect! Most of the "how can it be a problem at that distance with such a small amount of power" comments are making (very incorrect) assumptions about beam spread and the behavior of laser light on a cockpit window. Even over longer distances a beam stays pretty well focused. So maybe we are talking about a beam of a meter and very little light. Just get your eyes fully night adjusted and test how little light you need for it to be "quite bright". Its VERY little.
Re: @ Zog The Undeniable
Yet the pilot would be used to looking at very dim lighting (fully dilated pupils) and suddenly gets a (still pretty bright) flash of green or red light in the face. This IS going to be disorienting.
Try the comparison given in the article. Sit in your car, in the dark, with night-adjusted vision, and have someone fire a photography flash in your face (NOT WHILE DRIVING). Then see how long it takes before the afterimage has faded enough to be fully aware of everything in your surroundings again.
As long as the cowboys are kept out
I'm all for allowing commercial use of drones/quads/cameraplanes. I just seriously hope some knowledge of airmanship and airspace regulations is required of the pilot before a license is obtained. (I've made more elaborate posts about this in the past). There's too many cowboys out there just screwing about because they feel like it, completely ignoring any safety rules deemed "well, dûh" in the "regular" aviation world.
Ugly and unergonomic
With that stupidly narrow keyboard shelf I'd be having cramped wrists in no time flat. On top of that it's not exactly pretty.
Swing and a miss as far as I'm concerned.
Cancelled for today due to weather unfortunately.
Re: I don't want one
I have a car with very basic electronics. Throttle is done by cable (With some electronics for idle valve control and fuel injection. IE not entirely safety critical), brakes don't have esp, just ABS (Which is mostly mechanical in nature), hydraulic power steering (no computer involved), etc. And I'd think twice about buying a modern car that DID have all those mcguffins.
And I fly regularly, albeit with the cables and pushrods kinds of planes. Even on a plane, the basic handling of the plane might be done by the computers, but the actual flying, the decision making, the collision avoidance, the navigation, etc is handled by humans in the more critical phases of flight. I can trust a computer to that point. But once you start mixing in other traffic and pedestrians, I wouldn't trust a computer to drive me around. Let alone fly me around.
(And no, there isn't a single airplane control system out there that could handle 8 planes in close proximity trying to land on the same uncontrolled airfield. A human CAN do that however.)
I don't want one
And I'm very sure I will NEVER want one. I vastly prefer to be driving myself than to be driven around by a computer, programmed by some unknown programmer, with unknown risk/deviation/accident handling routines.
Re: Overpondian Garden Sheddery
And then I actually acted according to my nickname...
The effect in the video is done with a linear slide, a bit harder to do than a rotating mount. There are some DIY examples of camera slides out there, but they are often quite involved to build.
Example of the rotating, egg timer solution:
Re: Overpondian Garden Sheddery
Easiest way to achieve that effect is a small camera and an egg timer. Attach camera to top of timer, set timelaps, wind up eggtimer, set down and enjoy.
Actually pulling a plane/glider hasn't happened, but there have most certainly been cracking issues in sailplanes. Most often it's limited to mounting of aileron or airbrake levers but there have been a few Circulars about checking wing roots because of cracking found.
Re: 1+1/E seems dubious for low values of E
Old tanks are more likely to have been converted to scrap already. New tanks are more likely to still be at the factory, "enroute" or deployed to particularly strategic locations. Which means the general population is more likely to come from the middle segment. (Ofcourse, if you start looking at tanks in those particular locations that just received a shipment of new tanks this might skew the data) Overal its just a decent assumption to take the number you have and double it if you have just a single sample. Once you get 2, you get slightly more confidence, etc.
In the first example, if you get a decent sample of serial numbers production date incrementation becomes quite obvious.
In the second example, if you have a sampling from the CB450-1xxxxxx range and a sampling from the 3xxxxxxx range, it'll become obvious they come from 2 different series. Missing any data of an interlying 2xxxxxx range means you can assume that range doesnt exist.
Re: 1+1/E seems dubious for low values of E
You have a very large uncertainty when dealing with small sample sizes, so I find this entirely reasonable. Basically, if you have one sample, you just assume the one number you found is somewhere in the middle of the range. (The chances of finding one in the first or last quarter of the range is much smaller than finding one in the middle somewhere). Thus you double the number and call it a day. You'll only get any decent sort of estimate with larger sample sizes. I'd say atleast E=5 to be a lower limit for any sort of "accuracy", but that doesnt make lower sample size guesstimates any less relevant or that higher sample sizes are very accurate.
Still not making any sense.
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