Engineering

I think this is a important and interesting part of engineering category. Espacially with thinking of bionic architekture / construction engineering. Its impressive what we can built up today with the nature as example. Here is an example of an awesome tower project. I am looking forward to the experiments of bionic with surface! I mean, today the photovoltaik and solar elements are indispensable for architecture. Thats one step of a great way. And how it began? With Nasa experiments für astronomic work

Car wing=Car Being Blown in Wind? Well, I got to thinking... What if the very forces involved with the wing of an airplane, go to the car being blown away in the wind in a tornado of hurricane? The reason I think this is, the wind pressure on the top of the wing, is lower. But the part under it is higher. So I was wondering, if it wasn't the force of the wind that was blowing cars away in the wind, but the low pressure behind the car. When the wind hits the front of the car, the pressure increases, much like the shape of the wing. But when it gets to the back of the car, the flat-ish surface of the back creates drag, which is just a low pressure area, so th…

Hi: To start off this is not a homework question. Here is my problem and the info I have,it falls under physics and engineering. you have a 6"x8" piece of Titanium 2.54mm thick. This piece of metal has dents in it from 1 to 25mm deep. What I need is a chart that shows the amount of kinetic energy required by a projectile to make the deformation at the point of impact. I think this info should be available someplace but I dont know where to start looking. I am sure a formula exists to solve this but im not a engineer. I dont know what other info you need to solve this problem. The projectile will vary that is why I need a chart to find the minimum amount required …

Need to build an egg launcher that is: powered by water has a parachte and a deployment method must land a raw egg without it breaking in a 2 litre water botlle

I've been reading about solar sailing projects and they seem to mostly focus on using solar panels to charge batteries that are used to run propellors. The problem is that the batteries are heavy and cumbersome. I am wondering why the batteries couldn't be replaced with some kind of sea-water hydrolysis system since, as I recall, salt water electrolyzes more easily into hydrogen and oxygen anyway. I also haven't seen any that combine wind (sails) with solar panels. Could solar panels be used to make hydrogen and the hydrogen used as fuel for propellors when their is no wind on a sailboat?

While reading this article about the potential for building floating cities (http://www.gizmag.com/lilypad-floating-city-concept/17697/), I was wondering if there is any research into floating structures for people to use?

if you have a Remote controlled submersible with no empty space in it will pressure be a problem? is it possible for a hobyiest design to be able to withstand pressures of 681psi?

Someone seems to have redeveloped an older concept and won an award for it:http://www.greenoptimistic.com/2011/02/09/dickson-ekranoyacht/ The fact that this vehicle's efficiency is being attributed to its use of hydrogen as fuel leads me to question its validity, since hydrogen is not a fuel but a storage medium. Still, I'm wondering about the claims that such a low-flying boat/plane could actually be more efficient than a non-flying boat. Surely it is much less efficient than a passenger Jet flying at very high-altitude, but how much less?

I'm looking to build a co2 laser....not as worried about high power as much as a working unit from easy to find parts....the hardest part to find cheap would be the power supply....I can make this a little less hard by keeping the watts down.....I was wondering if a 10 mm tube 600mm long or even shorter with a good vacuum pump would keep the power demands low and still be a laser? Is there math for this?

I have been having discusses about different propulsion system looking for ways to bring the space cost down. And after looking at the different propulsion system it seems chemical propulsion is the only option --- Anti-matter ( very very very costly (way more than chemical propulsion) cannot be controlled or stored has fuel. Also hard to make you have smash atoms and it only last for second or so the anti-matter If there was breakthrough where we can make lots and lots of anti-matter very cheap and can control it and store it and use it has fuel it be banned for use in , earth thus only used for deep space has a size of rock would destroy all of New York.…

i was making some jet engines this morning but after a a thew succesful runs, the just started giving out puffs of smoke, is there any reason for that happening as i have not managed to get them to work ever since? i have been adding the same amount of fuelin the same temperature, i know this because i have been making sure i have been launching them in high temperature areas with temperature controls in place

I'm wondering if anyone knows much about smart fabrics. I've done a little research about it as it's something I'm interested in. I'm looking for someone to have a discussion with and hopefully answer some questions I have. For those who don't know what it is. Smart Textiles E-Textiles Conductive Textile This is kind of example of the technology. Join the discussion tell me what you think about it. Bounce some ideas around. Also if you know of something that is related to this technology please let me know!

So, I have to right my research paper for school this year. However, I do not yet have a topic. My paper needs to have a persuasive element to it and I would like it to have something to do with engineering. I have always loved engineering and it would my topic interesting to me. Thanks, Bartimaeus

What are your favorite reads on the topic of robotics? If you had to choose one book on robotics to share with someone, what book would that be?

Hi everyone! I have a science fiction story in which a dog has a GPS locator chip embedded under its skin, sort of like a Home Again or Avid chip. In one scene, the dog gets shot with what's basically a Taser. It was recently brought to my attention that the electrical current would likely destroy the chip. (Is that true?) Later in the story is a pivotal scene in which another character uses the chip to track the whereabouts of the dog. I don't want to cut the dog-shooting scene because it's fairly important from a character-revealing standpoint. If the chip were instead attached to a leather collar, would that prevent it from being destroyed by the Taser? Tha…

I hope that there is someone out there who can help me with working where the torque is measured on a wind turbine I am trying to calculate the power it can generate, I have tried lifting a weight on the shaft and have calculated the time that it take to lift a weight within a time. But when reading the calculations that Betz limit states there is no comparison with what he claims, using the lifting method it is far less than when connecting a small generator to the shaft, For example if i know what the turbine can lift at the end of the blades and lets say 200 rpm can lift 116 grams at that rpm. this would equal 1.13 newton of force is the calculation for …

what are the obstacles preventing a city from being built underground?

how could a typical remote control helicopter be redesigned to allow it to fly autonomously to preset way points. would some kind of GPS system be necessary or could some other form of navigation be used? this could be used to transport materials from one place to another my hope for the system would be that 1. a range of 2-3 miles 2. an altitude of 15-50 feet 3. a cargo capacity of 15-25lbs

Hi: I’m thinking of hypothetical purely-natural gas fired radiant heater in which the significant emitter of thermal radiation is the flame itself. What would be the disadvantages of this heater? The fuel is purely-natural gas. By “purely natural”, I mean it is the raw, unprocessed, and unrefined natural gas straight from the marshes. In terms of oxidant/fuel ratio, the flame is stoichiometric. Oxygen [O2] is the only oxidant to burn the fuel. Each and every molecule of the fuel is fully-oxidized by the oxygen but without there being any excess of oxygen. There are 6 sides to this radiant heater. Left, right, back, front, up, and down. The height of the le…

I heard recently that there was a kind of navigation(i can't remember what the system is called) that used ground based signal instead of satiates. is a system like that more cost efficient or more accurate? a navigation system use both and maybe even other nationalities versions of gps?

Hi: I’m thinking of a hypothetical monitor for a TV/computer. This display does not use plasma, LCD, or a backlight to any extent. Instead it relies purely on LEDs for emission of light, colors, and images. As with most screens, each pixel contains a red, green, and blue subpixel. However, in this hypothetical monitor, each subpixel consists of a single LED. Each pixel – and its respective subpixels – are as small as physically-possible given the state of today’s technology. The screen contains as many pixels per area physically-possible with today’s technology. These specs ensure that highest possible image resolution. What would be the disadvantages of this …

Hi: I'm thinking of a theoretical device that could be used as an air heater for the home. This device emits a wavelength of EM radiation that is best absorbed by nitrogen. This causes the N2 molecules to heat up. Since the air on earth's atmosphere consists largely of nitrogen, could such a device be used to keep a house warm during winter? As air is pumped into the house from outside, it passes through this device, absorbs the radiation and gets warm. Finally, the air enter the rooms through the vents. The advantage I see to such a device is that it wouldn't cause the house to have the classic "heater" smell. What would be the disadvantages -- excluding …

I'll elaborate a little. I trying to work out how to calculate and how to make at least 180 F (80 C) and 3 gallons per minute (11 liters/min)? Thanks in advance! Adam

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First I don't know how these devices work or what is holding back these devices .It is very much in TV shows and movies the scfi !! My take is it be 50 years or more to we have it and still some of the devices may be scfi and have no science base. It will be cool if we had these devices but again I do not know how those devices work or if they have any science base. 1.Holographic like in star trek or star wars Princess Leia 2.Holographic storage 3.Molecular assembler Is any of these device scientifically possible and what is the engineering problems? I know with a laser gun or phaser like in star trek the main problem is a material problem and battery …