You're sure about that? With an open engine, no added work is required to breathe. Changing the direction of air moving at 600mph in one direction by 90 degrees requires a lot of work. I think your loss of 5-7% efficiency is more than a little optimistic. Imagine driving a car at 100mph and then suddenly turning the wheel all the way to the right.
What kind of "simulated environment" are you talking about? CFD? That would be a very complicated test. Alternately, if you had a access to a low speed or transonic wind tunnel in which you could test a mockup of your engine and cone, you could determine the intake airspeed and identify what windspeeds provide sufficient volumetric flow rate to the engine for it to operate. However, wind tunnel rates (at the cheapest) are going to run you $300/hr. A CFD program capable of modeling your scenario starts at about $20,000 per seat.
I would believe this idea for a stationary engine or one moving at low speed. I think your idea may be neat for a small jet powered car or boat, where the utility would be more like "not getting your hat/hand/flying plastic shopping bag/various other items ingested by the engine."
I try not to discount anyone's crazy ideas, since I've had plenty of my own. Sometimes though it is helpful to have some potential issues pointed out.
I'm only an aerospace engineer when I need to be...
Sorry, but in engineering an aircraft you put a price tag on everything, including passengers. Look at the number of people who sue Boeing or Airbus whenever a plane crashes (regardless of the reason) and you'll see why.
Because engines don't work like that. You need a LOT of air to run a jet engine. The intake has much to do with being able to fly. By blocking the front of the engine and trusting you can get enough air in from whatever limited space to the sides you have created, you'll force a compressor stall very quickly, if you can get enough air into the engine to start it at all.
There's a reason why there is little variation in jet engine design.
Anyway, putting a cone in front of the engine far enough will generate vortices which will likely propagate over the wing leading to inboard stall, very much "screwing with lift." If they don't propagate over the wing, then they will hit the wing, increasing structural fatigue and possibly inducing dangerous vibration.
I think that using a counter with some 74 series logic and LEDs would be cool, and it would actually be appropriate to drive them with a monostable multivibrator for this project.:)
The scary thing is that assumes 100% perfect products released to market, that QA never makes a mistake, and that no faulty product fails prematurely. None of those are realistic, no matter how hard legislators or people demanding your ID want them to be.
"So in theory, there's no additional risk of collision, only the risk that the driver won't be able to make through the crossing before the red light in case the driver couldn't brake in time."
The law in (as far as I know) every state in the US is that you must stop at a stop line, before a pedestrian crosswalk, or before entering the intersection. There is NOTHING WRONG with being in the intersection when a traffic light turns red, you just cant ENTER the intersection when the light is red.
Siemens NX CAD. Its been running on linux for a few years now, I wrote some of the original installation "hints and tips" back when it was still UGS NX. Granted, it costs more than TurboCAD, but its an excellent program. You might be able to get a good deal if you only want certain licensed features rather than a bundle.
NASA plans to send Axel to Beverly Hills from their Detroit R&D facility to provide it with an environment in which it will have to adapt to its surroundings while facing certain danger at every turn. It will likely interact with two other robots, including "Billy the TALON/SWORDS robot", inexplicably equipped with a grenade launcher.
I'm just waiting for the day my 9406-500 that I use as a TV stand decides to roll itself over to my bed in the middle of the night and crush me, declaring, "VARY OFF HUMAN" in a cold, condescending voice.
Already done. The British call it ANPR, automated number plate recognition. It is very good. Its used on speed cameras all over the UK. The technology was developed as an antiterrorism system originally. British intelligence wanted to be able identify vehicles used by IRA bombers.
The real solution is to simply tell all respondents that they have won an all expense paid vacation. Send them some fake e-ticket to print out and tell them where to go, and then just put them all on a rocket to the sun. Problem solved.
I'm not so sure about that. I work for a high-tech aerospace/electronics company, there are 3,000 people here at corporate headquarters, and we have replaced hundreds of windows workstations with linux and mac workstations over the last 18 months. All the windows boxes are running XP. The world isn't ending, we're adapting, and there is nothing the linux and mac users can't do that they couldn't before on windows except run Outlook.
You make this all sound so trivial when in fact you only describe a single case. To counter your single case, I have one of my own. I used to manage software licensing for a proprietary aerospace design software package. The program used WIBU-KEY dongles for licensing, and later versions are going to use CodeMeter. Your approach to the license dongle is simply "remove the jump to the license check." What if the program is several million lines of code, and license checks are done thousands of times randomly throughout the program? Any one failed license check will shutdown operation of the program, only letting you save your work and quit. I had issued hundreds of licenses, and nobody complained about the key. It was unobtrusive and the only problems had with it were PEBKAC issues. If someone called in and needed a new license or was having trouble, there was no waiting, I'd do it right there for them. Email requests usually within a couple hours. It is possible to use dongles in a non-hostile manner and have friendly support for them.
I'd sometimes go perusing for hacked copies of the software, and you know how many I found? Zero. None whatsoever. I'd find forum posts by people asking for it, but no replies. Moving to CodeMeter, the entire application can live on an encrypted flash drive essentially, and the driver loads the executable into memory encrypted, only decrypting blocks of code that it needs on the fly. WIBU systems has had multiple cash prize contests to try and break this, and nobody has been able to. I left that company before that was ever implemented, but it seemed like a cool idea to me.
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You're sure about that? With an open engine, no added work is required to breathe. Changing the direction of air moving at 600mph in one direction by 90 degrees requires a lot of work. I think your loss of 5-7% efficiency is more than a little optimistic. Imagine driving a car at 100mph and then suddenly turning the wheel all the way to the right.
What kind of "simulated environment" are you talking about? CFD? That would be a very complicated test. Alternately, if you had a access to a low speed or transonic wind tunnel in which you could test a mockup of your engine and cone, you could determine the intake airspeed and identify what windspeeds provide sufficient volumetric flow rate to the engine for it to operate. However, wind tunnel rates (at the cheapest) are going to run you $300/hr. A CFD program capable of modeling your scenario starts at about $20,000 per seat.
I would believe this idea for a stationary engine or one moving at low speed. I think your idea may be neat for a small jet powered car or boat, where the utility would be more like "not getting your hat/hand/flying plastic shopping bag/various other items ingested by the engine."
I try not to discount anyone's crazy ideas, since I've had plenty of my own. Sometimes though it is helpful to have some potential issues pointed out.
I'm only an aerospace engineer when I need to be...
Sorry, but in engineering an aircraft you put a price tag on everything, including passengers. Look at the number of people who sue Boeing or Airbus whenever a plane crashes (regardless of the reason) and you'll see why.
Because engines don't work like that. You need a LOT of air to run a jet engine. The intake has much to do with being able to fly. By blocking the front of the engine and trusting you can get enough air in from whatever limited space to the sides you have created, you'll force a compressor stall very quickly, if you can get enough air into the engine to start it at all.
There's a reason why there is little variation in jet engine design.
Anyway, putting a cone in front of the engine far enough will generate vortices which will likely propagate over the wing leading to inboard stall, very much "screwing with lift." If they don't propagate over the wing, then they will hit the wing, increasing structural fatigue and possibly inducing dangerous vibration.
Net Neutrality kills YOU!!!
...Boeing will fire 10,000 workers!
I don't say this to troll. I work in the aerospace industry and am watching bright, talented friends and coworkers get laid off left and right.
Microcontroller? Really?
I think that using a counter with some 74 series logic and LEDs would be cool, and it would actually be appropriate to drive them with a monostable multivibrator for this project. :)
[compmd@compmdt34fed ~]$ ps aux | wc -l
229
I guess I can't migrate to Windows 7 Starter Edition.
The scary thing is that assumes 100% perfect products released to market, that QA never makes a mistake, and that no faulty product fails prematurely. None of those are realistic, no matter how hard legislators or people demanding your ID want them to be.
Got an RFID tag in your drivers license? Throw it in the microwave for 2 seconds.
Got a magstripe on your drivers license? Rub it with a magnet a few times.
Got a barcode on your drivers license? Use a little fine grit sandpaper on a few blocks.
Oh, that's funny, I wonder why your reader can't read my license. Must not be working right.
"So in theory, there's no additional risk of collision, only the risk that the driver won't be able to make through the crossing before the red light in case the driver couldn't brake in time."
The law in (as far as I know) every state in the US is that you must stop at a stop line, before a pedestrian crosswalk, or before entering the intersection. There is NOTHING WRONG with being in the intersection when a traffic light turns red, you just cant ENTER the intersection when the light is red.
Siemens NX CAD. Its been running on linux for a few years now, I wrote some of the original installation "hints and tips" back when it was still UGS NX. Granted, it costs more than TurboCAD, but its an excellent program. You might be able to get a good deal if you only want certain licensed features rather than a bundle.
NASA plans to send Axel to Beverly Hills from their Detroit R&D facility to provide it with an environment in which it will have to adapt to its surroundings while facing certain danger at every turn. It will likely interact with two other robots, including "Billy the TALON/SWORDS robot", inexplicably equipped with a grenade launcher.
Well, you could just make it run on Plan9, that would accomplish your goal...sort of.
AC is right, its fact. Just because you don't like it doesn't make it a troll.
I'm just waiting for the day my 9406-500 that I use as a TV stand decides to roll itself over to my bed in the middle of the night and crush me, declaring, "VARY OFF HUMAN" in a cold, condescending voice.
Well, if IBM builds skynet, then we win the war by saying PWRDNSYS OPTION(*IMMED).
That is so fake and unrealistic.
Nobody has a Diners Club card. :)
"OCR on license plates are very doable"
Already done. The British call it ANPR, automated number plate recognition. It is very good. Its used on speed cameras all over the UK. The technology was developed as an antiterrorism system originally. British intelligence wanted to be able identify vehicles used by IRA bombers.
Vertical integration. We don't outsource anything. HR, Marketing, Product Support, Manufacturing, they are all involved, not just the geeks.
The real solution is to simply tell all respondents that they have won an all expense paid vacation. Send them some fake e-ticket to print out and tell them where to go, and then just put them all on a rocket to the sun. Problem solved.
I'm not so sure about that. I work for a high-tech aerospace/electronics company, there are 3,000 people here at corporate headquarters, and we have replaced hundreds of windows workstations with linux and mac workstations over the last 18 months. All the windows boxes are running XP. The world isn't ending, we're adapting, and there is nothing the linux and mac users can't do that they couldn't before on windows except run Outlook.
...help pitches YOU! ...programming talent has YOU! ...botnets control YOU! ...malware writes YOU! ...Windows boxes infect YOU!
Hm, I wonder what Polonium tastes like, because right now my Pepsi
You make this all sound so trivial when in fact you only describe a single case. To counter your single case, I have one of my own. I used to manage software licensing for a proprietary aerospace design software package. The program used WIBU-KEY dongles for licensing, and later versions are going to use CodeMeter. Your approach to the license dongle is simply "remove the jump to the license check." What if the program is several million lines of code, and license checks are done thousands of times randomly throughout the program? Any one failed license check will shutdown operation of the program, only letting you save your work and quit. I had issued hundreds of licenses, and nobody complained about the key. It was unobtrusive and the only problems had with it were PEBKAC issues. If someone called in and needed a new license or was having trouble, there was no waiting, I'd do it right there for them. Email requests usually within a couple hours. It is possible to use dongles in a non-hostile manner and have friendly support for them.
I'd sometimes go perusing for hacked copies of the software, and you know how many I found? Zero. None whatsoever. I'd find forum posts by people asking for it, but no replies. Moving to CodeMeter, the entire application can live on an encrypted flash drive essentially, and the driver loads the executable into memory encrypted, only decrypting blocks of code that it needs on the fly. WIBU systems has had multiple cash prize contests to try and break this, and nobody has been able to. I left that company before that was ever implemented, but it seemed like a cool idea to me.
Gallium is very toxic. Its not something you just want to throw out with your daily trash.
Hey, stop writing in perl and hacking the school grade server!