Design Definition and 1000 Threads

i would like to design and build missiles for the navy which upper school subjects should i take and then which uni corses should i follow them up with

Hello everyone! This is my first post, so excuse my improper etiquette (if any). Anyways, the Pinewood Derby, just in case you guys are unfamiliar with it, is an event that is held as a competition where small, homemade cars, race. The track is contains a ramp, which then leads onto a flat...

I am a member of a small group of physics graduate students in charge of a monthly series of public science lectures. The lectures are aimed at local high school students, and we have many high school teachers who encourage their students to attend by offering extra credit. The audience of each...

how to design a circuit to determine the rpm and torque from a fan?

Hello, I have to design a heat exchanger for my uni course and am a little stuck with where to start. I know a little about LMTD and OHTC etc etc. my main starting problem is finding material properties for ethylene glycol, I have tried Engineering Toolbox but for the maximum temperatures I am...

I'm graduated in mechanical engineering. I would like to do MS on Refrigeration from USA. Then I would like to focus on design fields. But currently I'm working in the field of steel structure erection. Hope your suggestions and advices to change career.

Homework Statement Design the circuit in the following figure so that ##V_o = 3V## when ##I_L = 0## and ##V_o## changes by ##20mV## per ##1mA## of load current. (a) Use the small-signal model of the diode to find the value of ##R##. (b) Specify the value of ##I_S## (saturation current) of...

Hi, I have been given a project to design a system that can "bead deposit" thermoplastic. I have found this resource, It is basically an adhesive deposition system used for packaging in industry. So I think this is a good place to start, by trying to create a simplified version of this. I...

I have been tasked to design a controlled descender to be used on a building site to lower tools/rubble to the ground. I'm trying to design a product like a fan descender like that seen at powerfan.co.uk Could anyone help me with the theory side of its operation. Obviously it uses the fans...

Homework Statement The attached figure shows a simple voltage-divier connecting a dc voltage source to a variable resistive load. Design the voltage divider to provide a voltage of about 5V (+/- 10%) across the variable load. The load-current demand varies in the range of 0 to 5mA, and the...

Homework Statement Design an integrator to integrate a ##2 kHz## square wave with peak to peak amplitude ##0.5V##. Choose ##R_F = 150 k##, ##C_I = 10 \mu F##. Choose ##C_F## such that ##R_F >> \frac{1}{\omega C_F}##. Choose ##R_I## such that ##R_IC_F << 0.5 ms## and ##\frac{1}{\omega C_I}...

I need to design a pwm circuit, i using the circuit from internet that i attached it.. freq is 20khz which is my requirement and 15v to power up the tl494.. there is no response when i connect potentiometer to it... waveform is attach can anyone give me advice?

Hello everyone, I am trying to design a self reversing screw. What I am doing is, I am sketching a rectangle and using extruded cut option in Solidworks, cut it along a helical curve. One more and this time in the opposite direction. It comes out nicely. Now what I don't know is, should I use a...

Homework Statement Consider a strictly decreasing function F: ℕ → ℤ. We want to find the "first place where f is at or below the horizontal axis." Assume we can compute ƒ(i) for any input i in constant time. Clearly, we can solve the problem in O(n) time by evaluating ƒ(1), ƒ(2), ƒ(3)...

I am working on a project that uses a box design with a base. The base has two through holes on the the outer edges that will be used to slide up and down with in the box. The box will support two guide rods where the base can slide up and down. My intention was to use springs so that as...

If using diffusion pumps (2 or 3 in series) to achieve ultra high vacuum, how do you hook them up together, for example adding them onto a system like in the provided picture? Would you use T-connectors to put them all on the same input and output valves or would you have valves for each pump?

Homework Statement Given the availability of resistors of value 1 kΩ and 10 kΩ only, design a circuit based on the non-inverting configuration to realize a gain of +10 V/V.Homework EquationsThe Attempt at a Solution So I was doing some of those good old design problems, and I came across this...

Homework Statement Draw the simplest logic gate or circuit for the description below. The inputs are ##a, b, c## and the output is ##z##. ##z = 0## only if ##abc = 010## or ##abc = 110##Homework EquationsThe Attempt at a Solution So i drew up a quick table, AND and OR'ed the required terms...

Hi All, I'm trying to design an experiment for measuring force along a cable. The cable is will be held in a persons hand and the other end will be fixed to a transducer to measure the force of tension. In order to account for the multiple force vectors, I thought of using a gimbal table or...

Can anyone help me create a strip board design for this circuit please? It would be greatly appreciated!

Guys does anyone know the design procedure for an eccentric lobe and a crankshaft. Crank is subjected to maximum load 350 kg periodically. As load is applied the crank rotates the eccentric for about 50 degrees and runs the shaft connected to the eccentric runner. Its urgent. Can anyone help out.

I am working on a lot of things with electric motors, and many other electromechanical devices. Any textbook comes to mind?

Homework Statement Design a multiplexer circuit given the data such that: When ##C = 0##, the output ##X = A##. When ##C = 1##, the output ##X = B##. The truth table is displayed below: Homework EquationsThe Attempt at a Solution I wanted to make sure I understood this and I wasn't...

to make leaf spring we can use any plastic materials ? what are strong plastics? please find it friends

I'm a junior at my university in electrical engineering and we're tasked with created an original project for my electricity and magnetism theory class. I've come up with something I want to do, however a fair amount of the design for this project is pretty far out of what I know how to do...

I am designing an elevator system and i wanted to use timing belts with a counterweight. After almost fully completing the design it was brought to my attention that my pulley and belt setup was not the best choice. Any insight on what anyone thinks would be great! The top pulley and belt...

Hey, I am embarking on a drive to the arctic circle. I have spent a bit of time googling looking for a kite to pull behind my truck to film the adventure and can't find much useful information. Is there anyone that could design or point me in the direction of a place to design a decent kite to...

Hello... kindly help me out in designing of power capacitor to improve the power factor as the given load is 950 KWatt and power factor is 0.7, as i want to improve the power factor to 0.92 then what formula i should use to design the capacitor as the Voltage line to line are 400Volts

I'm doing a university project on HVAC design of a laboratory(Agricultural Products).I'm having trouble verifying whether I have understood what I have researched correctly This is what I have understood from what I've read.First I would calculate the cooling/heating loads as I would have from...

Hi everyone, I am a High School student (final year) and am doing an extra-curricular project. Having complete autonomy on what we do the project on, I choose to design a High-Altitude Long-Endurance (HALE) UAV, such as the QinetiQ Zephyr [http://www.airforce-technology.com/projects/zephyr/] or...

Okay I'm a second year electrical engineering student and will I'm thinking about going to deep down to the metal part of computers, I mean how to build microcontrollers and processor.I gave it some thought,and I looked at the computer engineering classes and all of them were about software...

Hi At the moment I am trying to design a variable HV psu for some projects (some of which haven't even been though up yet, but I want to ability to run everything for hv off of the one psu). The idea is to use a transformer(which would double as an isolation transformer) with a 600:2500 ratio...

Hello all! I am a high school student who is taking my first physics class, Honors Physics. I have taken mechanical engineering classes prior to this class. We have recently been assigned our major project of the year: The Dreaded (by some) Physics Car. Our goal is to design and build a...

I have two questions. One theoretical, and one pertaining to the homework question below. The theoretical question for which I am having trouble. When designing a controller to compensate a process using Bode Plots, why does my book seem to just use the forward loop gain rather than the...

I'm a student from Newcastle University from Singapore Institute of Technology (A new launched University in Singapore) and am majoring in Electrical Power Engineering. My current final year project requires me to research on BS1363 and try to reduce the amount of copper usage as we know that...

Hi, My question regards a plastic bottle that I'm designing. For the threading that fits the two parts together, will and Acme thread work? This is how I've designed my part, but I can change the thread profile if need be. Also, is there anything that I need to know regarding the pitch? I have...

hi all, i need a favor; could someone design a simple circuit whereby * it takes two constant potential sources (V1, V2) as inputs & then * { outputs V1 , V1=V2 } { outputs 0 , V1≠V2 } what i found tricky was that these were voltage sources, so that kinda eliminates being able...

So I go into a debate this morning with a co-worker about a boat hull design. He is stating that if we create tunnels in the bottom of the boat that run longitudinally and are capped on the bottom but open on the ends they will trap water and act like ballast tanks thus adding stability when...

Dear Members, The existing design for the pressure vessel is an end cap bolted to the body which is not designed to any pressure vessel code. Currently I'm trying to qualify this pressure vessel to PD5500 code. Due to the derated allowables in the code i couldn't go with the bolted...

An example: A car that senses if you have your seat belt on and the door is closed I can declare: D - for door S - for seat belt D is 1 is door is open, 0 if door is closed S is 1 if seat belt is on, 0 if it's off This is all very straight forward and can be implemented with combinational...

For the final year project that i am doing, I need to design a high efficiency ceiling fan blade with airfoil section, tapered and also twisting. Can anyone tell me how can i obtain the optimum pitch angle for different section of my ceiling fan blade?

I'm going to write a (semi) hard SF. I wonder whether i left out something from spacecraft design, or got something wrong?Armed cargo ship (used for piracy/commerce raid also) At the back of the ship, a large block contains the fusion reactor, the main ion thruster, the manuevering ion...

Hello, I have a cylindrical aluminium tube ( Diameter- 8cm, Length-15 cm, Thickness - 0.5cm ). It is insulated from bottom and open from above. I want to raise the temperature inside the tube maximum upto 300 degree celcius in a controlled fashion. I want to use electric coils to heat it. Can...

Hi there, I am making a beam splitter for an FTIR, but I do not know the anatomy of a beamsplitter of this type, does anybody have information on the design of these? I plan to order KBr crystal windows and apply the Ge coating myself using physical vapor deposition and assuring quality with a...

Hey y'all, I am in the 11th grade and have been assigned a spaghetti bridge project. Our teacher taught us nothing about bridges or structures, but only the basic forces. We were instructed to research designs of bridges online but every website or forum that I have found has had a different...

Hello Friends, Can you help to solve the problem of my solenoid coil as before i created 12VDC coil & its working fine thanks for that help guys. but now i want 240 VAC solenoid coil. so can you please help me which SWG I have to select. how many turns have to select..i want the equitation how...

how to design a bms circuit for nimh. we have 11 cells in one battery pack and and all the cells are in series, if one cell discharge rapidly then how to moniter it through controller?

Design Project You will undertake a detailed engineering design of a specified product. This will include: - Analysis of all functional requirement of the product - Consideration of various preliminary design options (possible solutions) - Detailed analysis of engineering performance...

Hi, I would like to establish a advancing/learning way to learn and understand machine elements. Today I tried to search for hydrodynamic radial sliding bearings on search engines but I have find only two results. Is something wrong for it? it should have another names...

Homework Statement design a code converter that converts a decimal digit from the 8 4 -2 -1 code to BCD. Homework EquationsThe Attempt at a Solution so i listed out the BCD order from 0 to 9 and listed the weighted 8 4 -2 -1 code so that the weights would equal to the BCD equivalent. 8 4 -2...