Design Definition and 1000 Threads

Hello again, I am currently designing a flywheel for a 745 KW engine inertia dyno. Basically my design requirements are so: Max RPM: 530 RPM (=55.5 rad/s) Flywheel Diameter: 1.7 meters Time needed to accelerate: 60 second (to max rpm) I need help determining the mass of the...

Homework Statement Need to build a container to hold a Large grade A egg that must have maximum dimensions of 25cm x 25cm x 25cm. Score for marks is based on Score = (200 - Distance from target in cm)/Mass of container with egg. The egg is thrown from at least 1 m above the ground and 2 m from...

Hello, I'm curious about what kind of academic paths would lead to weapon design and research. Right now I'm doing a BS in physics and will likely pick a sub-minor in Mechanics or Electronics. There is also computational physics, condensed matter, and cosmology sub disciplines at my school...

Homework Statement http://media.newschoolers.com/uploads/images/17/00/58/56/03/585603.png Homework Equations None The Attempt at a Solution I have tried just messing around with them, and I have tried to turn this table into a "boolean" expression. I have no idea how I would begin to solve...

Hello all. As the title has informed you, I wish to make an water electrolysis cell that can not only produce hydrogen, but also store it completely separate from the oxygen (Again, I promise you, it is not for fuel. Now, your probably wondering why I don't just make the typical...

Homework Statement I have to solve for RD, RS1, and RS2. Homework Equations AVNL=-mg(Rd//rd) Vdd-Id(Rd+RStotal)=0 Bias Line Eq: Vg-Vgsq-Idq(RStotal) The Attempt at a Solution I have solved for RD by using the AVNL equation and the given value of -8 for AVNL. I found RD to be...

I got material from this site that I used for my proposal(for the literature). Have a time limit to submit the program on the day of examination (1st Dec, 2012). I need a check and correction I attach copy of the flow chart and diagram. C PROGRAM FOR RETAINING WALL STABLITY AND DESIGN C...

Hi, I wish to study (non-trivial) algebraic functions which have varied cycles at a few places other than the origin. It's not hard to search for a particular covering at the origin. For example, the function f(z,w)=(8 z^2)\text{}+(-10 z-4 z^2-6 z^3)w+(-10 z)w^2+(-3 z^2-6 z^3)w^3+(-9 z^2+4...

Hey! I have a certain problem. Let M ≥ 4 be an even number and consider the set [0,1,...\frac{M}{2}-1]. The problem is to put those numbers two times in each row of an M x (M choose 2) matrix, such that all possible combinations of entries that contain a pair of the same number occur just once...

Dear all, I need realizing an electromagnet producing a magnetic field changing in direction with a given frequency (from 100 to 800kHz). Max intensity should be 400-500 Oe. I need applying this magnetic field in a small region (10x 10 mm2) and I would prefer the electromagnet not so big...

Hello, I need some help with a difference amplifier design I'm working on. The amplifier has to be work from a positive voltage supply only. I'm having a hard time getting it work with single supply voltage (it works when I use both negative and positive supply voltages). Both the inputs have a...

my lonesome have been working on a set of mufflers that don't sound like fecal matter. I am having a difficult time finding just the mufflers (race mufflers). I DO NOT want an entire exhaust system. I do have the capability of fabing up mufflers, I have custom made equal length headers to an x...

[b]1. Homework Statement [ Here is the question that I am struggling with. I am told that my answers are not correct, but I do not know where I went wrong? Any suggestions would help greatly! I attached a paper with all my work shown. Thanks! A solid one-way, continuous slab is used...

I'm working on the design for a dry-hull model submarine. My plan is to cast the hull shape that I want out of aluminum because this type of casting is cheap, easy to make, and because aluminum has a good strength to weight ratio. I want the hull to be able to withstand an external pressure of...

I need some help Desperately for this class. this project is 10% of my grade and I'm doing really bad in this class >_<. I have read the book but is all talking about is bunch of formulas that i have no idea how to relate them to this. I uploaded the diagram as well that was part of the...

Homework Statement I am designing a voltage divider common emitter amplifier given the following parameters Av= 40 dB +/- 1dB Zi> 1000 ohms Zout< 5000 ohms Stability factor = 5 Beta*re= 650 ohms Beta minimum = 35 Beta maximum = 300 Vcc = 20 volts Rload = 33 kilo-ohms Rsource =...

I am nearing the end of college, and have to start picking my electives to get approved. You can mix or match or do an emphasis in either mechanical design or energy. Ever since I started school, I was sure I wanted to do energy because the classes sounded interesting. But now, I have really...

Hello everyone, I am working on a project in which I need to make a broadband/pulse transformer. The transformer will operate in the 20-80kHz range. The transformer will use about 20 watts of power. I need a turns ratio of 1:3. 20V input 60V output It's just for hobby use. I don't have...

Hello all, Its Ali here. I am a Electrical (Telecom) Engineering student and my Final Year Project (FYP) is Portable GPR in which I am designing UWB transceiver. Currently I am working on the transmitter part. Here are a few specs of the design: -Simulation Software: NI Multisim 12.0.1...

I'm trying to understand the angles and force involved with my current project of building a 3 wheel front loading cargo bicycle. The current design stipulations maintain that the rear wheel always remain inline with the cargo(There are a vast majority of designs that do not adhere to this)...

Hi all! I am happy to find this very informative forum! I have graduated with a degree in Production Engineering and Management and I am interested to gain more knowledge in CAD and work as a Design Engineer. While in University I had a CAD course where I learned to use Pro/E, but that's all...

Hey everybody, a couple years ago, I came across the top gear video for the Arial atom: a ~1000 lbs road legal 'go-cart' with a supercharged I-4 engine with a power to weight ratio of 600HP/Ton. Even though the body is already light, I would love too (once I get the time and resources) build...

I need "book smart" help with this boat design. Here is a picture of the design which I will explain in a minute...

Homework Statement I have to design a Common Emitter Amplifier using a 2N2222 NPN transistor and an 18V DC supply. The specifications are as follows: Should be stable for variations in forward current gain, β. The input signal to the amplifier is a 0.2 Vp sinusoidal signal, at a frequency of...

Hey guys, For my degree project this year I am designing a Vertical heat pipe to be used in a geothermal heat/power production application. I was wondering if anyone knew of some good resources about this topic. Any advice would be appreciated!

Homework Statement Find the design ultimate sagging and hogging bending moments per metre width of slab. Load on slab- Imposed 32 kN/m - Permanent 39 kN/m Length: 5m Depth: 8m Thickness: 0.175m Not sure if relevant but it has 2 spans (i.e. two 5m lengths of slab) but...

I am studying basics of analog circuit design from microelectronics circuit analysis by donald neamen And in that i encountered a problem in design of audio amplifier. The question and solution is given in the attachment. And i want to know that in the output emitter follower why there are no...

Homework Statement Assume the op amp is ideal. Design the circuit such that Vo = Va + 2Vb + 3Vc The Attempt at a Solution Not sure how to go about this one. I started with \frac{V_a}{R_a}+\frac{V_b}{15k}+\frac{V_c}{R_c} = 0 since the op amp is ideal, the sum of the currents going into the...

Hi everyone. I need small help regarding my BE project. I would like to design a current to voltage converter circuit for silicon detector, which produces current of 10pA. can anyone help me how to start please. Best Regards, nani

Hi, i want to design a heat sink for following mosfet http://au.element14.com/vishay-formerly-i-r/irfp360pbf/mosfet-n-400v-23a-to-247ac/dp/8649359 its technical data sheet is provided here http://www.irf.com/product-info/datasheets/data/irfp360.pdf i am not sure how to design it...by...

I have to calculate the number of M6 Button head screws required to hold a door panel of 40 kg when 700N (calculate at the center line of the mounting holes) of force is applied laterally. I want to consider only lateral case when the force is applied perpendicular to the door panel. Any idea...

how do i determine the bending stresss on the vertical column?? i already have the bending stress on the horizontal member due to a load of 4000lbs..and i have the bucling st or compressive stress on the column.i was told that the column undegoes both compressive and bending stress.. is the...

I plan on undertaking an Undergraduate Degree in Games Design, however I also hold a keen interest in Mathematics. I know that both degrees are a great combination for the programming aspects of game design so I want to do Mathematics afterwards. I'm wondering whether I will get any kind of...

I need to design studs for a front truck wheel inlcuding the pattern, position, type of stud etc. I am having trouble developing a free body diagram of the wheel studs and finding all the forces on the wheel studs. I know the following info: Max all up mass loaded...

Hi, I was wondering if anyone knew how to design a single supply difference amplifier... I don't want a comparator or a difference amplifier chip. I need something that will output an AC wave. The inputs of the amplifier are AC sine waves which have slight difference in amplitudes. I designed...

Hi, I am trying to design a Synchronous PM linear machine but do not know from where to start. The only known parameters are the required power and the maximum distance that the translator can move. Can anyone guide me on how to proceed please? Thanks Annalise

Hi, This is my first post, and if this is the wrong area, I apologize. I was wondering if anyone knows of a software package that will design the pole faces for a quadrupol or hexapole electromagnetic beam focusing magnet given the beam parameters and electromagnetic magnetic field strength...

Hey All, I've been a long time viewer of these forums but only just joined because I'd like to get some other viewpoints. For one of my biomechatronics assignments, I was asked to design an active knee exoskeleton for assembly and use in the developing world. I've already conducted a...

Hi everyone, Recently i went to visited my grandfather and he brought me to his room where he pulled out an old artifact that he got from his father that got it from his father. He says it is from Egypt. it like a circle container and has a symbol on it. The symbol really intrigued me so...

I'm designing an inline heater for a coffee brewing project. My plan is to use an aluminum tube with Nichrome heater wire wrapped around it to heat the water flow. For brewing I need to dispense somewhere around 16 fl-oz per minute at a temperature of 205 F. I would like to determine...

I know that in collage, you need to take a mechanical/electrical engineering courses, but what is the design process for weapon making? As in, the thought process of creating it?

Hello folks I am about to start on my final year project and I am not sure how to go about it ,, as in what I need to write about and what calculations I should do relative to my design, its bascailly a system that apply s plastic hanging tabs to a product ,basically it will be a motor that...

Dear All I have been recently started to work with Reverse Engineering technology and I would now like to determine a circuit layout diagram of a charge controller from its PCB Layout. Can anyone please help me with this one. I have uploaded the PCB design for your reference. Please...

Anyone can guide me how to design gearbox on speed reducer? If I using spur gear on my design which type of spur gear has better lifetime and lower cost? 1) Brass Spur Gears 2) Steel Spur Gears 3) Stainless Steel Spur Gears 4) Ground Spur Gears If Steady-state input speed 1000 rpm and...

I've been design a simple ohm-meter which can measure resistances in the range 0.001 to 100 Ohms. I am aiming for an accuracy of 3%. Here's the circuit (so far): The circuit is basically a programmable current source which can source a current of 100, 10 or 1 mA. At junctions Va and Vb...

Need on urgent basis as to design supercell lattice of pcf

The link is an image with the question and circuit representation: http://i49.tinypic.com/2mmwg8l.png Here are the equations I used: V_out/V_in = R_2/(R_1 + R_2) {using the node method} R_thevenin (R_th) = R_2*R_1/(R_1+R_2) And given the conditions => 10 < R_th < 30...

Hi all, I'm curious about what you guys did for a senior year project. Even though I'm still far from graduating, I'm already thinking about senior design. Anyone have any ideas for an EE project that involves mechanical engineering as well? Maybe that wouldn't be feasible since as an EE...

Perhaps someone may be able to suggest (Windows) software that I could use that allows me to draw experimental set-up schemes on my computer (i.e. include images such as beam splitters, wave plates, PBS’s) without much hassle? Anything that is open-source, perhaps? And easy to use? Otherwise...

Homework Statement Given = 5 - light bulbs Light bulbs 1 and 2 each dissipate 180 mW at 12 V Light bulbs 3, 4, and 5 each dissipate 45 mW at 9V. 1 - 12 V supply 2 - Resistors (Range 10-1000 Ω) 5- switches The design must meet the criteria: Each light bulb can be independently...