Engineering

it was possible in flight simulator 95. our fluid mechanics professor says it isn't. well?

Hi Need a good book or help with the math This invention relates generally to a methodology which includes a counters flow air energy exchanger combined with two blower pressure chambers. More particularly to an energy recovery apparatus and method which two air pressure and blower chambers which controls and facilitates the air paths to flow directly into the energy recovery exchanger. Both the counter flow energy recovery exchanger combined with the two blower chamber provides an effective energy saving apparatus at lower operating cost.

I m trying to make parts with Vacuum Infusion process. I make a vacuum bag and check for leaks by leaving it untouched for 2 hrs minimum. After 2 hrs if I am not able to pull against the bag, I consider ther to be no leak. Only then do I proceed to the resin infusion. However, after infusion the bag changes shape. I understand it could be exothermic reaction and etc. But the data sheet of the resin says there is a rise to 130 degrees celsius in 5 hrs approimately. Now if I keep the pump on to achieve the compressive forces of compaction to keep the bag in shape, I lose resin and increase the chance of resin boiling. Could some one tell if there is another solution to this…

Todays planet still functions on Steam engine technolgy now over three Centuraies old. We have been encouraged to find new alternate fuels and have done so. However the development of new technology best suited to new energy has been discouraged every step of the way. This is to be expected given so many obtain their wealth from the Piston Engine, Steam and Gas turbines. To counter the resistance to change new development is available Open technology free to copy. Many many gasses have higher pressure the heat than Steam and the piston engine has so many moving parts its efficiency is deplorable. The internal combustion engine only needs be one mo…

Hi: I'm looking for an air-heating system with the following qualities: 1. No part of the system should produce any odor -- I notice many heaters give off a smell which distracts me from daily tasks. 2. No part of the system should generate any CO2, CO, or water vapor -- this means it cannot be directly fueled by gas or other chemicals. 3. No part of the system should require any water -- this means absolutely no hydronic thermal devices. 4. No part of the system should contain, produce, or use any toxic substances to any extent. What do you suggest? Thanks a bunch and Happy Holidays, Green Xenon

Hi: I recently posted something similar messages. I apologize profusely if anyone is annoyed. Infra-red C spectrum = 100,000 nm to 3,000 nm 100,000 nm = 2.9979e12 Hz = 2,997,900,000,000 Hz 3,000 nm = 9.9931e13 Hz = 99,931,000,000,000 Hz Arithmetic mean of IR-C spectrum = 51,464,450,000,000 Hz = 5825.23388 nm Due to the above and the inability of the device in http://www.scienceforums.net/topic/53451-wide-spectrum-irc-emission-device/ to exist, I'm now thinking of a free-electron 51,464,450,000,000 Hz laser for the same applications of that previous IR-C emitting device. In addition, the emission of the 51,464,450,000,000 Hz light from th…

Hi everyone! I really like nanotechnology and I really want to know how biological systems could help create a new ecosystem of nanomachines! I wonder about power. Specifically, could nanotech systems do a better job of tapping nuclear power than macroscale systems? I have read about the National Ignition Facility and using lasers to create fusion. Would it be possible to build a device much smaller than NIF which uses nanolasers fuse individual nuclei of fusionable (please excuse if that's not a word!) isotopes? How big would such a nanomachine have to be and what parts would it need? Would you use lasers, electromagnetic fields, or something else? How would …

Hi: I recently posted something similar. I apologize profusely if anyone is annoyed. Infra-red C spectrum = 100,000 nm to 3,000 nm 100,000 nm = 2.9979e12 Hz = 2,997,900,000,000 Hz 3,000 nm = 9.9931e13 Hz = 99,931,000,000,000 Hz Arithmetic mean of IR-C spectrum = 51,464,450,000,000 Hz = 5825.23388 nm Due to the the above and the inability of the device in http://www.scienceforums.net/topic/53451-wide-spectrum-irc-emission-device/ to exist, I'm now thinking of a different device for the same applications of that previous IR-C emitting device. This hypothetical device emits only 51,464,450,000,000 Hz light, not higher-frequnecy and not lower-frequ…

Hi: I thinking of a radiant cooling device for houses and buildings in which the cooling -- in the direct sense -- involves only radiation. Sort of like a glass-ceramic radiant-stove-top in reverse. Indirectly, however, some amount of convection and conduction will be needed [liquid nitrogen, cold metals]. The cooling panel is the ceiling and cools objects below it. Quote from http://en.wikipedia.org/wiki/Glass-ceramic : "A glass-ceramic stove uses radiant heating coils as the heating elements. The surface of the glass-ceramic cooktop above the burner heats up, but the adjacent surface remains cool because of the low heat conduction coefficient of the material…

Hello, I am looking for a sensor that can indicate me if there is a source of heat nearby. Let's say the temperature of the heat is 65°C (in the air), I am looking for a device responsive enough to give me the information in less than one second. I was thinking about an IR-light to Voltage converter, but it doesn't do what i want. I'm hearing any ideas. Rodriguez

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Does anyone know how to even start this problem.. I seriously have no idea....... Please help a poor guy out...

Hi: I'm currently thinking of a hypothetical device that emits a spectrum of EM radiation with a maximum wavelength of 100,000 nm and a minimum wavelength of 3,000 nm -- as well as any and all wavelengths in between. This is known as the Infrared-C -- or IRC -- spectrum The intensities [i.e. photons-per-second-per-square-meter] of light emitted are equal throughout the spectrum, no one wavelength is of greater or less intensity than another. This hypothetical device does not emit any wavelength of EM radiation out side of the IRC range. In addition, the emission of the IR-C light is constant, non-flickering and non-pulsatile. The shape of the panel emitting this radia…

I am convinced that the amazing magnetism power on a magnet can be used for building an electricty less magnets motor, however due to the conversion of energy law, my question is how long it will run due to the fact that mangetism energy willl be converted to mechanical energy and this as results will deplete the magnetic energy, this could be the limiting factor for practical applications, i wounder if it could run seconds, minutes or hours?. A guy in Romania claims via youtube video that he has created one. Any comments in this possibility? www.engitek.com

Hi Everyone. I am trying to perform a test on a system that will determine the integrity of the piping. It can be a pressure or a vacuum test. My idea was to 1) Cap off one side of the system 2) pressurize the line or draw vacuum from the open end 3) trend the change of pressure over time (say 20 minutes) Given that data i am a bit puzzled on how to calculate the "in-leakage" rate. I dont want that in-leakage to dilute my sample by more than say 10 percent. I dont think i can use PV=nRT because it is not a enclosed system - i am adding air to it or air is escaping. Please provide some guidence, Let me know if you have other ideas on how to get the sa…

Sometimes, when I think of the current Earth I am living in, I wonder how can a problem be solved while bringing some gravy to us. This is one of the thing, I've thought of today-Incineration power plant. In theory, it is a power plant using garbage as fuel. Garbages contain polymers which generate dioxins under combustion in O2. With modern incinerator, we should reduce dioxins to trace amount. So if this is taken care of, is it practical?

Since 2009 my country used two common petrols which are RON 95 & RON 97. Since the RON 95 is cheaper than the 97, it was usually chose by people. Before the petrol price hikes we use 97 type. But, recently i noticed that there were many car's accident case which involve car explosion and normally cause death. Although the crushed from the accident weren't so great, it always follow up with explosion especially when the car been hit from behind. I think the RON 95 was responsible for the explosions and i'm going to do some study on it. So your help is needed.

Since 2009 my country used two common petrols which are RON 95 & RON 97. Since the RON 95 is cheaper than the 97, it was usually chose by people. Before the petrol price hikes we use 97 type. But, recently i noticed that there were many car's accident case which involve car explosion and normally cause death. Although the crushed from the accident weren't so great, it always follow up with explosion especially when the car been hit from behind. I think the RON 95 was responsible for the explosions and i'm going to do some study on it. So your help is needed.

Since 2009 my country used two common petrols which are RON 95 & RON 97. Since the RON 95 is cheaper than the 97, it was usually chose by people. Before the petrol price hikes we use 97 type. But, recently i noticed that there were many car's accident case which involve car explosion and normally cause death. Although the crushed from the accident weren't so great, it always follow up with explosion especially when the car been hit from behind. I think the RON 95 was responsible for the explosions and i'm going to do some study on it. So your help is needed.

http://www.youtube.com/watch?v=Z4XEQVnIFmQ

Just playing on you tube and decided these were very cool!! this one starts lame and then becomes amazing!!!

I have a design outline, and I wonder if I could get comment. I have been giving a great deal of thought to very low temperature geothermal power generation. The problem seems to be heat transfer efficiencies at low temperature differentials. Low temperature 190F geothermal uses a binary cycle to turn turbines. I propose here the use of a coupled binary cycle system to generate power at very low temperatures. There are a number of inefficiencies to overcome, to power the compressor for the initial earth loop cycle. No pump is needed for circulation, but a compressor must be powered, in order to provide the heat source. This compressor requires a power source. …

Hi. Does anyone know a manufacturer of 1 to 2 mm thick flat vinyl 4' x 8' sheeting ? Sort of same type of material homes use as 'siding' ? (Not tyvek products) Seen signs printed on such material at Lowe's stores but they do not carry the product. Somehow the net did not show much, or I did not search the proper terms. Thanks.

I'm trying to make a catapult to test the accuracy of 4 different textured objects. I have to shoot from 3 meters away or farther. What can I do to improve accuracy?

Somehow I stumbled upon this subject tonight. I've been searching for hours to find out if it is true or not. Everything I can find seems to say it's true, but my BS detector is going off. I haven't actually taken any of the images and tried to scale the detail, but a rough eye guesstimate is telling me that some of the details are close to .0001" or smaller. At one point he talks about "drilling" a hole in a hand to hold a fiber of some sort, um...ok. Snopes (so you know it's true ) even has a bit about him: http://www.snopes.co...microscopic.asp At one point they claim a doll in a doll house is the size of a human blood cell. http://www.cellsal…