Engineering

Might seem like a simple question but when I thought about it, I think how the wheels of the train stay on track needs to be elaborated. Sure, if the train travels only in one track, it has a steep extrusion at the middle of the wheel which allow it to stay in track, but... If it crosses another railway, how can we make sure it stays in track? Go here if you don't know what I mean: https://farm3.staticflickr.com/2513/3874671000_349f1f4b18_z.jpg?zz=1 http://static.panoramio.com/photos/large/58668679.jpg

Hello! What material would be best for condensating steam back to water outside? *To clarify, I am making something which involves turning jets of steam back into water outdoors in the blazing sun (Texas, baby!) and I need a cost-efficient material which I can shoot the steam against and have it condensate quickly back into water.

Please help me find the advantages and disadvantages of flying carinvention to our daily life

Hello, can you suggest me some good project ideas for a civil engineering student?

I have recently discovered that air is not just ionized by nature, but also by electromagnetic radiation. I have two questions: 1) how much electromagnetic power is needed in order to ionize the air (in terms of kw) 2) Does ionized air cause any adverse health effects when the ionization is caused by electromagnetic forces, rather than nature? Thank you

It's almost spooky what a robot will do with just a few simple rules, as with a PID controller. In my project below, at 1:20, all I do is issue a forward-command, and the system moves backward momentarily to tilt the robot forward, and then it moves.

Hi, Any advice on what the best type of heating solution would be for the following scenario? I have seen some large infra red patio heaters and have also looked at some gas panels. I am not sure if the IR will kick out enough heat for what we require. We need a heating panel (can be gas, electric, whatever) that is large and will kick out enough heat so that something left near it will start to singe. Ideally the item (a wood panel) will reach a surface temp of around 400C and stay about there. I remember the old electric bar heaters that were hot enough to set stuff alight if you left things too close.. (my nan's dog regularly ignited its fur by lying too cl…

I am a bit baffled why the Stirling Engine is not more commonly used when we, as a global community, need to turn out engines which are quiet and clean with a lack of heavy pollutants? What are the restrictions stopping the use of this beautiful engine? Link http://upload.wikimedia.org/wikipedia/commons/c/cc/Alpha_Stirling.gif

I didn't calculate anything till now, I don't know if radiation pressure is good enough to propel a spacecraft(My question). Obviously I'm talking about radiation pressure coming from radioactive dregs of nuclear fission! How it works? It's sufficient to release radiation in the space to have a propulsion in the opposite direction: it's conservation of quantity of motion because radiation pressure is a palpable quantity of motion!

Hi all. New to the forums but wanted to share a project I've been working on for a while. Since highschool I've been messing around fusors and other plasma based devices. I recently made a video going over some of the basics of working with these kinds of systems using mostly salvaged parts. Hope you enjoy

gif of girl with amputated hands using bionic hand: https://gfycat.com/VacantRequiredAmethystinepython How does the bionic hand know/recognize nerve signals being sent to the area that would be her hand? Also, how is it calibrated that it provides the right amount of tension with the nerve signal? ~EE

Hello to everyone , i spend 1 year in observing the whole idea an i solved it . my Question is do you think it is worth it to send the blueprints to some university ?

Photographic filter holders are usually metal. Looking for a source of plastic ones, to avoid corrosion. Need is to hold diaphragms instead of optical filters. Can be from any application other than cameras. Sample pictures ----> https://www.aliexpress.com/item/NEW-Camera-Filter-40-5-43-46-49-52-55-58-62-67-72-77-82mm/32655570830.html?ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_10068_10130_10084_10083_10080_10082_10081_10110_10178_10136_10137_10111_10060_10138_10112_10113_10062_10114_10156_10056_10055_10054_10059_10099_10078_10079_10103_10073_10102_10096_10070_10148_10123_10147_10052_10053_10124_10142_10107_10050_10143_10051,searchweb201603_1,af…

I'm just asking when I woke up in the morning I just remembered a YouTube video about time traveling,a thing or a machine that is faster the the light can cause up time-warping(or time-travel). So a brilliant Idea just come out on my mind to make a sketch plan for a machine that can run fast in a miles but it not possible as well. A bullet train in Japan can run as fast as a sportscar but I need an idea for this (time-travel). In YouTube I just randomly found an interesting video that America has has a secret plan for making a time machine BUT I DON'T BELIEVE AS SOOO. So my point is what machine that can run fast

An oven using electric heating elements creates zones that widely differ in temperature, depending on proximity to the red hot heating element. Some modern units with a fan for circulation of hot air inside, should be considerably better. Microwave ovens deflect radiation into all directions with rotary motion. Can some type of moving 'mirrors' be implemented to incandescent heating elements to spread the radiated heat evenly without air currents ?

I am wondering about the feasibility of re-tooling gas stations (petrol stations) as follows:- >>> Instead of delivering hydrocarbon fuel (petrol) to a vehicle with an ICE, they would recycle the in-vehicle battery electrolyte stored in the traditional fuel tanks of an EV Factors to consider would include:- - Reconfigure EV in-vehicle systems to monitor and recycle the battery electrolyte with fresh electrolyte from vehicle gas tank - EV would attend a gas station periodically, which would pump out the spent electrolyte from the vehicle holding tank and pump in new 'charged' electrolyte - Gas stations would have device/appliance to re-charge and recy…

This latest episode in the Graphene story is looking very promising. I seem to remember Lockheed Martin claiming something similar a few years ago, but these people seem to have cracked the desalination bit of the puzzle, and it could make a huge difference to the energy and running costs of desalinating water : http://www.manchester.ac.uk/discover/news/graphene-sieve-turns-seawater-into-drinking-water/

small generator lighting 7 W led bulb 230 V E 27 homemade and another small generator is lighting 230 V Mr 16 led 3 W the movie: it will be possible in the close future to create one more powerfull?

it has missing parts so if you figure it out you can build it

I need a reccomendation on a heat resistant material for temp up to 300 degrees. Will be used in solar water heater. Should be readily available and inexpesive.

Sorry if this has already been posted, but this has been bugging me for a while and a search didn't turn up anything. We keep talking about alternative energy sources everywhere when there is a constant energy around us all the time. What I want to know is, could gravity be used as a feasible source of energy?

This is a plausible interstellar spacecraft I am working on. I have a spreadsheet for calculating the trip and another for calculating the space station that attaches to the top. What I need help with is creating another spreadsheet for calculating the particle accelerator based thrusters. The space station has a 1 million person capacity, 61 floors, gravity ranging from 10 to 9 m/s^2, has a 3 kilometer radius and a height of 50 meters. Here is my space station calculator: https://docs.google.com/spreadsheets/d/1mFxDcOCeMIcSz0SkMcrBNviBcmjU_Ru80dd7iFF_Vn8/edit?usp=sharing Here is my trip calculator: https://docs.google.com/spreadsheets/d/12VQXeNwbLyUAzzwgPj4Qman6c…

This is just another idea me and some friends came up with as a possible renewable energy. So when two south or north sides of magnets meet they will push away from each other. What we were thinking is if you were to have a sort of "X" shaped piece with magnets on each end. Now this "X" would be able to spin freely on its center. Around each end of the "X" you would put a north/south magnet to push away on each side. Think of a graph and at a 30, 60, 120, 150, 210, 240, 300, and 330 degrees you would put a magnet. the x and y axis of the graph would be the arms of the previous piece. If you were to push the arm, with the same magnet as the other ones, into one of …

Until now, there have been only two working electromagnetic drive prototypes. The first one, EmDrive, was experimentally verified by NASA. Roger Shawyer opens up about the story behind invention of his EmDrive in an exclusive interview with IBTimes UK. The second one is Guido Fetta's Cannae Drive. And there will be many, many more to come. The new era of economic and affordable electromagnetic near-Light-speed space propulsion has barely began, just like the era of electric cars and electric airplanes. There is only one thing more powerful and explosive than all the armies in the world, and that is an idea whose time has come. Victor Hugo …

I am having difficulty in deciding how ultrasonic sensor to works in detecting human presence and stop at the right place and does not goes down when human move a little bit