Design Definition and 1000 Threads

Hye everyone... My project is regarding with hybrid car.can someone show me the calculation and the formula used to proved this value.taking example honda insight: for engine: Engine Type: In-Line 4-Cylinder Displacement (cc): 1339 Horsepower @ rpm (Combined: engine (SAE net) + electric...

Hi my name is Juan Motta and i´m new in this forum, I`m a total begginer in physics. I´m planning to build a solenoid (air coil or iron coil, i don´t know) with different form, like this: http://www.divshare.com/img/thumb/19310413-b22.jpg And i have some cuestions about, because i...

http://img404.imageshack.us/img404/9523/dynamos.jpg I understand that when the rotating magnet spins, current should be induced in the coils which powers the lights. So what is the point of the soft iron core? The rotating magnet should magnetise it because it is near it, and it should...

Currently this engine uses a 4-2-1 Setup with a crossover a few inches away from the exhaust port on the header primaries, only on cylinders 2 and 3(which is well before the first collector) This Engines Firing Order is 1-2-4-3The Crossover linking Cylinders 2 and 3 confuse me since are not...

Any pro here know how to design bellows in a pipe? especially cryogenic pipes, which have a -196 degree celcius of liquid nitrogen flowing inside.. i m out of idea and info... limited resources online.. Kindly give some advices... million thanks

Hello, everyone! I am new to the forums here, so I will start with a brief introduction. My name is Martin Pulido, and I am philosophy graduate who also happens to love card games (as well as board games). Card games not only illustrate philosophical ideas (War=Determinism), but many are also...

First, I am not an electrical engineer - I am a hobbyist building a prototype linear-stlye generator based on an idea I had which, for various reasons, cannot be built with magnets that pass completely inside of coil(s) like most of the ones I have seen described for wave energy capture and...

Homework Statement I'm designing a Pratt Bridge (http://www.garrettsbridges.com/photos/pratt-truss-bridge/attachment/pratt-truss-bridge-2/). It must be able to hold 10,000 lbs at pins every 5 feet and be 40 feet long. 2. Homework Equations / 3. The Attempt at a Solution I know how to...

Hey guys, this is my second time writing this first time browser crashed and lost it all I hate it when that happens. Anyways I will make this one shorter. My name is Tom, dropped out of formal school in 7th grade due to family troubles, got my GED recently I am 28. I live in Las Vegas...

Hi Folks, Sorry if this has been asked before but I have searched the forums and can't anything to do with this. Also please correct me if I am posting in the wrong forum. I am making an application with functionality similar to a revolution of a sketch within any CAD program. I...

I've attached a picture of an ion accelerator design I just though of. The power source can be any constant DC supply; the voltage X would only be limited by the breakdown voltage of the gap at a given pressure. The pairs of plates are close enough together and large enough that the E field...

guys, I want to design a electromagnet. but i do not know how to start. so could you please tell me what knowledge is needed for electromagnet design? Or you can recommed some data that i can find and buy myself. thanks in advance!

Does anybody know how to design a UWB Stepped-Frequency Continuoud Wave (SFCW) or Frequency Modulated Continuous Wave (FMCW) Transceiver? If you have schematics or you can explain a relevant block diagram in detail, please reply. Regards, Ali

Hi friends. I am so new with Comsol software to design something but I wonder, if it is possible to desing a bending magnet (dipole) and simulate the motions of electrons ? I really would like to do this. Please give me a hand,help me to handle and try to do one together. Best.

Greater Knowledge = More Evidence for Design?? I was studying bacteria. With better technology we have been able to determine that bacteria have an extremely detailed motor that allows for transportation. It is equivalent to a human swimming thru thick grease at 60 miles an hour. It baffled...

I plan on switching from electrical to aerospace engineering in the winter and aerospace engineering at my university is basically split into 4 parts, the one that seems to interest me the most is the space systems design), but I'm curious if there is any aerospace engineers here who are in that...

Hi everyone! I would be so happy if someone could help my little brother and I answer a question for a science project that we have researched ineffectively for hours. We hope to design the most efficient propeller for micro-wind turbine. The purpose of this propeller is to naturally rotate when...

Quantum laser diodes. How does light escape? I recently became very interested on the functioning of these amazing devices and so I read online about the topic of quantum wells, semiconductors and lasers. After much reading I believe I can now understand the basics of lasers, resonant...

Hello, I was googling for analog design electronic book, which describe the issues in application manner, so i found this book https://www.amazon.com/dp/B0072EJ8H8/?tag=pfamazon01-20 Please share your opinion concerning this book and others if you have. Regards, Hisham

Dear Forum, I am attempting to make a treatment mattress or pad for PEMF treatment of osteoporosis. I have osteo, and there are commercial units available, but they cost ~$3K+! I have a capacitor discharge circuit, but need a coil design for the pad. I created a gauss probe with a linear hall...

Hello all, i have an equation for flux density taking the inductor chrecteristics into account as Bmax= (Vrms * 10^8)/(4.44*A*N*f) but the company i work for has given it at Bmax=(Vl * 10^4)/(4.44*A*N*Vss) where Vl = voltage across inductor. i am finding a lot of variation for...

Hello... I'm trying to figure out how many magnets I need to put on one side of a piece of sheet metal in order to sufficiently magnetize all the surface area of the other side to a specific attractive force to other pieces of steel in contact with the sheet. It has been too long since...

Do you have any electrical engineering senior design projects suitable for someone who is BME/EE? This is one of the (few) classes necessary if I want to also complete the EE major, which I sort of joined for fun, because (i) they have all the math courses, not sure why and (ii) the professors...

I am building a device out of 1/4" brass tubing. I need to join lengths in such a way as to allow the tubes to flex up to 135 degrees from straight. I haven't been able to figure out how to get that much rotation from a ball joint without the joint falling apart.See attached diagram below for...

Greetings, I've been looking for a way to create a microphone capable of picking up high frequencies (up to about 100kHz). Electrets don't tend to go that high and piezo crystals even detuned will only give a limited band. I had the idea of bouncing a laser off a sheet of reflective...

I need to design a voltage doubler that takes in 115V-50Hz a.c. and produces a doubled voltage output of 230V dc. I am using this circuit: I need help in the mathematics part: i) How do I find the optimum value of capacitance? (Using high capacitance values reduces ripples; but can...

Homework Statement I think I did this right, but for some reason I am second guessing myself. I don't need help with the whole question, just this part: The question says "In this exercise, you will design and analyze a shaft and the bearings for use in a power transmission mechanism. You...

Homework Statement So this is a bit of a two-part question and I'm unsure which part I'm not doing right (or both!). i) Find the closed loop transfer function of the system shown ii) Design a proportional controller for the system to give a 10% steady state error Any help, hints, suggestions...

How to state null and alternative hypothesis for 2k factorial design of two factors? The Attempt at a Solution All i can think of right now is null hypothesis - Factor A effects not significant. alternative hypothesis - Factor A effects significant null hypothesis - Factor B effects...

Hi all, I would like to know how to design a thread/screw to induce a specific stress on an object. What I have in numerical data is the stress itself that is required. The application is very similar to that of a threaded car jack. By turning the thread, it will lift up the load that was...

I'm looking at custom building a Li+ battery pack, six or seven cells, and want to design a battery monitoring circuit that measures voltage of each cell and keeps track of charge/discharge. The battery pack needs to fit in a form size of about 8" by 2" by 2" so my circuit should be fairly...

Hi All, I want to understand this, if I go for new hardware design should I make the following decisions at the beginning of the design 1. The design should be CMOS based or TTL based in the sense that all the ICs on the board should be supporting either CMOS or TTL? 2. If I go for CMOS...

Hello, I am blanking on the equations I should use to calculate the stress through a section of a gear. I would like to be able to calculate the thickness of trepanned gear. Hopefully the attachment helps show what I am looking for. The area between the arrows needs to be minimized...

Graphic Design & Science: Fundamental Particles Visualisation Hello my name is Brendon. I'm a graphic designer interested in science communication and currently studying a masters in graphic design. I was wondering if anybody would be able to help me with a few queries with regards to...

Hi, I am looking to design a gearbox that outputs 200Nm from an input of 0.25-0.3Nm. My question is which gear train method would be more efficient. Also any design guidelines if there are any. The gear box is to be rotated at the input by a users own strength

Hi i would like to post for discussion my design of a new type internal combustion engine Please post your comments.The following information is to explain the description and operation. In drawing #1 The engine has three heavy pistons all attached together; two small and one large one in...

I've found out very quickly that I can't use a breadboard for RF circuits, what is another choice? I know PCB's would be best but making them is very tedious for me. I'm new at this stuff so I plan on experimenting quite a bit which is another reason I want something quick and easy to replace...

Hi all, I am working a design project for a geotechnical engineering subject and it goes as follows: A 6 storey building requires a 12m deep basement comprising 3 levels of car park with plan dimensions of 50m by 50m and is to be constructed in a medium clay. The water table maximum level...

Hey, I'm wondering if a short solenoid (50mm) would be able to pull a 300mm core through it if it was open at both ends? Or would the soleniod stop acting once the core had come to the far side? I've attached a pic of what I'm trying to do (forgive the paint drawring). I'm basically trying...

I am building an airspeed indicator that will be mounted on the roof of my car. The design is based on a water manometer. See the attached schematic. I will be able to determine the airspeed based on the weight indicated on the digital scale. My question is in regard to the dynamic...

Has anyone here have any experience on PCB Design / Fab / Assembly start up? May I know how did it to? What are the considerations? What are the challenges involved?

i doing the solar system design. seem like everything is on track now, but just the cable loss i not really know how to calculate, can anyone help me. i has formula on this (resistance on the cable (Ω/km)x length of the cable(L) x current of the solar panel(A)). for the equation above , is...

I'm doing the solar system design now . so far seem like everything is on track, but now i face a problem on the DC cable loss. is that has any formula to calculate the dc cable loss, i has using this formula is (losses of the cable (Ω/km)x length X current produce by the solar panel...

Hello I am new here, Can anyone share with me on how to design car radiator.:confused:

Hello, I would like some recommendations on universities that have nuclear engg. graduate programs that specialize in design and analysis of GEN IV reactors. My professors have recommended the following: 1. Michigan 2. Penn State 3. MIT 4. North Carolina State Any info regarding grad...

As part of a culminating activity for my course, I am asked to design and build a toy for children that uses kinematics and conservation of energy. I was wondering if anybody could post some ideas?

Does anyone know of any types of research out there that attempts to establish analytical ways to design an airfoil. As far as I understand it right now, when someone wants to design an airplane they grab some premade airfoil shapes and test there design empirically using CFD or a wind tunnel...

I need to design a shaft that have a specific torsional load acting on it. I have the safety factor of 2 and have a table of material properties (yield stress, ultimate stress, shear modulus, modulus of elasticity etc.). I need to find the diameter of the shaft that resist the specifies...

Hi there, I have a question about the Teller–Ulam hydrogen bomb design. This will be a long post , but I hope someone can answer it for me. When the first bombs were created, uranium device was simple enough to to figure out. Two sub critical masses of u-235 joined at... I...

hello, i designed a project and i finished it my final step is i want the user to enter 3 bits if it was 000 i will do the first choice, which has 4 inputs and 14 outputs displayed on the 2 digit 7 segment dispaly if it was 001 i will do the second choice, which has 5 inputs and 7 outputs...