Engineering

Who is the world's top engineer and why ?

I know that if you get a paperclip and put one end of the paperclip on one end of a AA battery and connect the other ends, too, the paperclip and battery turn extremely hot. But, if you tape the ends of the paperclip to the ends of the batter and leave it be for a while, will it build up enough resistance to actually explode?

what is the best way to polish aluminum 6061 T6 alloy to achieve FLAT, PARALLEL surfaces true to .001"? the pieces i need to polish range from 6"x 6" down to 2.5" x 2.5" and are .5" thick. i also need to polish copper 110 on one side only . it has to be flat to .001" also. thank you

There was an article today on physorg.com detailing a long list of limitations spelling out a limited future to nuclear energy, if you didn't already know that. The exercising of great care won't be much of a factor when you consider the sheer volume of energy used worldwide compared to the limited amounts of reactor fuel (unless you plan on filtering out the few ppm of it from the entire ocean.) 375 GW Total energy produced by nuclear reactors 15 TW Total energy consumption worldwide 15,000 Total number of nuclear reactors required to meet worldwide demand Plus, the long list of dangers, hurdles and setbacks really just contributes to an effort in futilit…

hello i want to make a hollow cylinder by using equations. this cylinder is closed both side but have 3 mm hole on one side also have a disk at the distance of 3 mm from that 3 mm hole.please help me

INVENTION FOR THE BLIND OR VISUALLY IMPAIRED --- Autor : Jose Manuel Ruiz Jorge (DNI : 44167671-N) * NOTE: This text has been translated automatically by a computer application online, surely there are errors in the translation from the original text in spanish. http://sites.google.com/site/josemanuelruizjorge/ Hello. On this website I explain a personal invention for the blind or visually impaired, which is a system of audio-tactile perception, interaction and guidance for the blind or visually impaired. I'm reporting this personal invention (claimed invention) with the inte…

Could I first make it clear that a container exists which will be able to withstand whatever pressure I put on it , so it need not be considered here for the purpose of the following ? Assuming I can , I shall also assume that at the centre of this container I can place a normal , regular , ordinary egg which is not being supported by anything . If the egg was surrounded by air and a facility existed which could allow me to vary the pressure in the container , what type of a Maximum Pressure ( in psi or bar or n/m^2 or indeed hectopascals if need be ) could I expect to get before the egg cracks ? Thanks to all in anticipation of replies !

These seem so obvious, yet nobody invented them yet. The Car Cooler: Cars parked in the hot sun all day get very hot inside. So hot it can kill people or pets, and destroy things accidentally left in the car. There could easily be a passive car cooling system powered by solar cells on the car's roof. There could be several intake fans sucking air from the shade under the car, where the air is coolest, then pass thru a simple water swamp cooling device. Hot air would be expelled thru one or more vents in the car ceiling. This can be disabled during cold weather. The Super Wiper Blade: Besides a rubber blade, the windshild wipers should have a razor that pres…

Hi there fellow desktop scientists and others that topic some time ago when a game developer asked about realistic damage formulae inspired me to come up with an equation for projectile penetration of a thin elastic-plastic shell. In the derivation below I neglect losses due to deformation of the projectile, and further simply assume that the projectile cuts through the plate by means of shear stress (i.e. wadcutter vs thin shells). Any comments or suggestions? I use the following symbols: velocity [math]v[/math] time [math]t[/math] initial velocity [math]v_0[/math] deceleration [math]c[/math] shell thickness [math]T[/math] force of resistance [math]F[/mat…

Whenever I buy new paper clips in a plastic or cardboard container, they are always tangled in such a way that it is extremely difficult to untangle them, since the parts of each clip intertwine with the parts of one, two, three, or even more other paper clips. However, if I just shake up a group of paper clips myself, they don't get tangled. Also, it is difficult and time-consuming to try to retangle groups of them by hand. This leads me to wonder if there is something about the manufacturing process that causes them to emerge all tangled up with each other, and if there is some tweaking of the process which could eliminate this minor but pesky problem.

I have several questions that need answering 1) can a complex circuit system still work in space? 2) if not how can I have one in space that will work? 3) will it still work in harsh environments of high heat or extreme cold 4) if not what would be a good insulator? *please answer these questions without any remarks that are off topic *i might also have questions to follow so do please answer them And yes I realize that this is the "Engineering" section

Here is a shortened version of an hour long talk on LFTR reactor technology, if you want I do have the link to the long version on my you-tube channel under "safe nuclear power" list.

Does anybody know? And does anybody know whether the job/field is in high demand?

I don't understand why pressure ratio is used for fans, and disk loading is used for helicopters. I'm familar with helicopter momentum theory, essentially induced velocity is equal to the square root of (thrust divided by (2 * density * area) ), or, since disk loading is thrust over area, induced velocity is square root of (disk loading / (2 * density) ). How is pressure ratio related to induced velocity, or thrust / power?

THE thought of wind power brings visions of giant turbines, high-altitude kites and graceful sailboats to mind. But the breeze has a more sinister side, full of turbulence that can wreak havoc with bridges and other structures. Now Hyung-Jo Jung and Seung-Woo Lee at the Korea Advanced Institute of Science and Technology in Daejeon, South Korea, plan to harness these destructive forces to generate energy. They have built a prototype that produces energy using a specific type of unstable airflow called wake galloping. Wake galloping is a form of vigorous vibration that affects cylindrical parts of structures, such as the cables on suspension bridges, exposed to seem…

ok Mooey sorry for the delay been mad busy building the plane !! right this it top secret ( seriously ) ok we have a 8 m wide plane we need to launch off a 6 m high platform ! to get the lift and speed we need to achieve at least 20 mph ! But faster means further ! any less we go down hill we are aiming to have the craft and pilot weighing no more then 150 kg although ideally less . weight is downward force but speed is a squared measurement so speed is better then less weight but both is really good though ( leave the weight to us ) So back to speed . ok so bearing in mind plane and pilot aprox 150 kg we the pullers 300 kg ish ( macdonalds every…

This flying machine comes from 1974. I first thought it was a hoax. It is not, it is abandonned technology. Why? My link

Hey Folks, I'm trying to find out what the components are called and where to get them for the following project. Any help is much appreciated. The project: I need to buy/make a plate or mat that could be placed on a flat surface, then have objects of various flatness and shape put on the mat. The mat is a grid of sensors that is divided up say 1/4 x 1/4 inch. It would be able to output the vertical pressure at each point on the grid. Then output (via USB or other connection) to PC software that would display the readings in something like a heat map or a graph. Much like those devices at the shoe store that map the bottom of your foot to figure out wha…

does anyone know if a diesel engine can be modified to run off steam ? who in the uk can do it ? .does any one run a steam engine to drive a turbine to produce electricity just now .do you know if any one sells a package that would do the job

http://techcrunch.com/2010/02/22/bloom-energy-boxes/ Supposedly, these small boxes somehow convert hydrocarbon fuel, natural gas I think the article says, into electricity. Apparently they are not suitable for vehicle applications, for some reason, though. If they were, could fuel be used to directly power electric motors to reduce battery weight while increasing the efficiency of gasoline or other fuels in transportation applications? How can chemical potential be converted directly in to electricity?

Ships seem highly suited to be powered by nuclear reactors. Granted, reactors produce nuclear radiation, which is deadly to humans unless shielded against. But effective shielding can be provided by large masses of material such as steel and concrete. This material may weigh a lot, but even a weight of a thousand tons or more, is not a problem in a big ship. Military submarines are nuclear powered, as are aircraft-carriers. These vessels have large crews, and no-one seems to suffer any ill-effects from the on-board nuclear reactor. So I wonder, why aren't reactors fitted to commercial ships?

Are there any horizons for chassis-design or other technological innovations that will make it possible for passenger-vehicles to maintain their current size while losing weight but not strength? Are there certain plastics or designs that will make it possible to drastically reduce vehicle weight without losing volume and strength?

is it damaging in anyway to use a 9V battery on a 1.5V - 4.5V 13100rpm electric motor? i tried it with a 9V battery and it spins very fast and powerfully, which is what i need it to do for my application, but is it bad in any way? would this be allowed in a commercial product for example?

Here is where my question comes from - Quote from Yahoo News: "A picture of the tail rotor of the chopper that the Navy Seals' Team Six detonated revealed unfamiliar features. Reports say it could be a new, secret helicopter. When the Team Six members reached Osama bin Laden's compound in Abbottabad one of the choppers made a "controlled but hard landing," according to reports, probably due to higher than expected temperatures. Temperatures affects the density of the air, and low density makes it harder for the rotor to sustain the weight of the chopper, especially if it was near its maximum weight (being packed with soldiers and fuel to fly in from Afghanista…

Hello to all! I'm a researcher and I'm looking for data about the geothermal potential. Especially I'd like to know how many Ej are technically expoitable from the Earth. There are different estimates but are all quite old. Thank you!