Design Definition and 1000 Threads

I recently have made a wind turbine based on Michael Waters basic design. It has 25 cm diameter and two bearings are attached to the shaft. At first, I have tested by putting it at the top of a ball point pen under a ceiling fan. You can see how it rotated in this video. But when I added the...

What is the best way that you all think that I can make these long two vertical pieces of metal spin on this stepper motor in the orientation as shown in the picture. I preferably dont want to cnc but I can and would if necessary. Thank you all!

Good day I am looking for a software called AEDsys.exe. This (AED stands for aircraft engine design) SW was created by Jack Mattingly years ago. It is the backbone of the computations involved in his wonderful book “Aircraft Engine Design” ( authors Jack Mattingly, William Heiser, David Pratt...

The first button releases the front slider which slides through a key way in the lever while it unclamps the sharpie - the lever is supposed to clamp down on the sharpie but just doesn’t. The first slider has a spring inside and is released in the second picture. The second button pushes down on...

TL;DR Summary: Want a lock that unlocks when flipped upside down As the TL;DR summary says, I am trying to come up with a design for a lock that unlocks when it is flipped upside down. I've looked into spring loaded locks and different lever devices but no luck. Hoping someone can assist...

NOOOOOO!!! They actually built it! https://www.facebook.com/hashtag/cernsciencegateway Literally decades of design, engineering and troubleshooting: https://www.physicsforums.com/threads/real-world-tesseract-crafting-a-4d-table-from-3d-cubes.205845/...

Hi all, I designed this swing set and now I'm doubting my self and getting concerned. I used 5" schedule 40 steel pipe for the posts and 3" schedule 40 steel for the top horizontal bar. There's only one post per side to be set 48" down in concrete 16" in diameter. This designed is to help...

Hello! Thanks for being a welcoming community and an informative resource. I'm an engineering consultant in Kentucky, specializing in mechanical design and space tech. I graduated from the University of Kentucky in 2022, though I wasn't a huge fan of their program. I'm glad to be out :) I still...

TL;DR Summary: I am trying to design a circuit using juat a power source, 3 switches (1,2,3) and 3 Resistors (a,b,c) and wires. i want to design the circuit so it satisfies 4 conditions. the first being if all switches are on, the 3 resistors have current flowing in parallel, second, if only...

Our source book is shiegly if somone answer i hope he give me yhe source of his infortmation

The question and my attempt at a solution are attached. Thanks.

I wanted to discuss the unusual design of a high-power hydraulic turbine. I'll start with this excerpt from the article. The article is in Serbian, so only an autotranslation. Has anyone seen formula #6 in any hydrodynamics textbooks? [Full image copy of journal article deleted by the Mentors...

I saw this on Facebook today, and thought it might be a fun general thread for Engineering to post pics of things that made you stop and think about what they were designed for. I had to click into the FB post to see if my intuition was right on this one. Thoughts on this one? Do you have...

My Google-fu has been failing me on this. I'm looking for a good variety of online resources and textbooks on the design of audio equipment. The level I'm looking for would be for upper-level undergraduate or intro graduate level electrical engineering. Topics must include how to best isolate...

Suppose there is a steady source of compressed air/gas at 5 barA pressure, and that will be released through an overexpanded convergent-divergent nozzle. I want to know how to design such a nozzle and what would be the parameters for that. And also what would be the minimum pressure at the exit?

I am currently designing an alternative to normal acoustic drum lugs and I need to find the forces that are felt by the tuning rods of a drum for the engineering background to my design. I have been able to use the 2D wave equation assuming uniform tension on the membrane and found values of the...

First off don't quit reading if you understand basic Bernoulli effect. I am nowhere close to the caliber of minds on this forum but I have a problem and lack understanding that science may help answer. Preface: Temperature extremes are stressing wildlife populations. I happen to be an advocate...

I'm building an aluminum tandem axle (7k total capacity) trailer. Boat (18'/1300#) on the rear and a Ryker Can Am 3 wheel (750#) on the front. It's a 23'-6" x 6'-8" bed. Max live load will be approx 2250#. 900# frame weight. 230# axles. I'm testing beam sizes with online calculators and need...

Hallo Could someone suggest me how to design a barrel cam (for example like in the butterfly valve actuator) to improve the initial torque generated by the movement ?

i have a plastic handle and want to join it with a metal body. i can join it with heat stacking method i have find a product who done done that. is there any other way to join permenently?

Looking through the Art of Electronics, I barely see any equations, mostly description. However, checking out this video, we get a whole page of calculations. Are the authors of AoE expecting that practitioners are already fluent in these design calculations? Are there examples of such...

TL;DR Summary: I have a problem designing an axial turbine, there is a lot I don't understand hey, how are you all doing, I am a chemical engineering student working on designing a geothermal power plant, weirdly I have been told that I must design an n-pentane turbine for our Plant, it's so...

^ This is my personal drawing of the diagram, I couldn't take a picture of the actual one. The setup is a pulley wrapped with a cord and mass hangers attached to each end. My first thought when approaching this problem was to first determine the rotational inertia of the pulley, then use some...

Locomotives are a complex combination of mechanical and electrical systems. The video shows different parts of a locomotive and their function. A standard mainline freight locomotive develops 4400 hp (3.24 MW) with some developing up to 6000 hp (4.47 MW). The previous standard from the late...

I had to repair (change bearings) on a single phase induction motor recently and I recalled an age old question I've had. What are the rotor end ring blades made for ? The only reasonable answer I can come up with is - they are for cooling of the stator winding ends that extend out of the...

For all the attention we‘ve paid to ring habitats, we haven’t talked that much about the interior design of the central trunk yet, around which the rings rotate. Just having one big hollow ship trunk, about 100 metre in diameter, would be a lot of wasted space. It would also be too easy for...

You have a design problem statement, which gives you numerical specifications for performance, spatial constraints etc, and you have finally come up with some mechanism ideas you synthesised into a machine concept. You’ve sketched your design’s parts and the final assembly. So: How do you now...

I'm trying to come up with a design for a handheld pump that will be used to suck diesel from a car's fuel tank. There's definitely going to be a pipe dipping into the fuel tank, and there's definitely going to be a human manually operating the pump. I'm trying to think of a mechanism that...

Hi, In the current project I'm working on, I want to develop a NodeMCU module using ESP32 rather than ESP826. The most recent module in this series is AS ESP32. In order to use it, the layout must be the same as the NodeMCU V3 module's. So, if possible, could someone help me out with the...

I'm making an online shop and want to retrieve the inventory from a database to display on the website. I've done some database work with php and phpmyadmin before, except the database was already set up when I took over that project - and I don't remember much/at all about the project...

Hi, I am experimenting with a design for an inductor for audio applications, and am using a high permiability toroid (12,000) having a closed trifilar winding. In this instance , it is 39T x 3 twisted wires connected in series being 117 turns in total, giving approx 180mH inductance. In...

Hello all, I am looking for some design ideas. I need to do some compression testing and here is my testing platens: The platens are small (5mm*5 mm) and my samples are even smaller with the cross section of 3mm*2.4mm, so it would be difficult to both position them within the platens and align...

Hi all, I was interested in ideal shapes for lenses and Google popped up this very old thread: "Mathematical shape for a lens with no spherical aberration"A member named Redbelly98 replied (<link>) with a now-broken link to a Thorlabs page that gave an aspheric lens equation. Took a minute...

I program basic button-type UIs for my manufacturing test programs, so I'm not expert in desiging popular program UIs. But I get so annoyed each day dealing with software interfaces to various web UIs that it's getting really bad. I need to vent a bit, but more importantly, are there UI design...

Quite a few options on Amazon but I wanted to ask around before I bought anything. Bonus points for anything using modern FEA packages. Thanks so much in advance Joe

I need to design a Buck converter circuit with the following requirements 24-100V (2 - 10 Amps) to 12V (20 Amps) Output. From the net i could get the below circuit. First major question is, do i need to interface a micro controller to achieve the functionality to drive the MOSFET? I am...

Hi guys, 1. Most of the design textbooks which I have seen on computer architecture put stress ONLY till the RTL design of computer architecture. But the story of computer system design goes much beyond the RTL description(i.e how RTL design is converted into actual hardware) 2. We begin from...

Summary:: I am making a landing gear mechanism, and am struggling to mathematically model it, the aim is to find the required properties for the spring for it to work. Hi can you help me with a problem, I am making a landing gear mechanism and am struggling to model it mathematically. The aim...

Got some good resources on Chemical plant design and construction. A Chemical plant design and construction. B Chemical plant design and construction.

Homework Statement:: trademark vs design right-: engineering professional practice Relevant Equations:: none https://www.copyrightuser.org/faqs/question-20/#:~:text=A%20Trade%20Mark%20protects%20logos,or%20part%20of%20an%20object. both sound quite similar. What's the difference?

DISCLAIMER: I am not entirely sure whether I should open this thread here or in #general, but I will try! :') Hi guys, I am a freshman in aerospace engineering and i have taken part into a competition consisting in engineering a rocket so that it reacher 1km altitude and manages to touch back...

Hi, *Excuse the crude visualization and possibly imprecise description - I'm not a rocket scientist :) So, I have a friend that has come up with a "new" concept for a rocket propulsion design, and although I have a hunch that it might not work better than existing designs I cannot really...

I want to use this to design a parabolic (optical) mirror; The problem is that in my application I need both D and f to be a parameter, but I need to specify f only as a perpendicular distance from D. In other words, I need to specify some f_2=f-d, and calculate d. I can't seem to come up with...

People who have passed Machine Design course & followed Shigley's mechanical engineering design book how did you study for exams? Please provide some study strategies that have worked well for you. So I have Machine Design course for this semester & I find it really tough.Our professor is...

OK, I'm stuck on a problem implementing this map. (It'll be built in HTML with JavaScript and CSS and is interactive but that's just context - this is really about map-colouring.) The function of the map is to help users see at-a-glance what regions/counties of the province are serviced by...

Building a 8' x 12' platform that will hold a small boat next to my dock. The platform needs to be able to be lowered below the surface of the water (launch boat) and lift above the water (store boat). Four pilings (one each corner) that each have an electric motor & reduction gearbox that has...

Hello, I'm trying to follow the instructions from the book "Aerodynamics of Wind Turbines"-Martin O.L. Hansen, to design a blade, the method it's the BEM accounting for the tip loss (Prandtl) and Glauert corrections, but I can't get it right, for the Cl (lift coefficient) and Cd (drag...

My progress so far: https://www.multisim.com/content/NV8Ndn6gdNtxbJFroJ8FFN/atempt2/open/

I've been working on a tool in a browser for engineering (particularly civil engineering) design. By design, I just mean finding values (maybe the cross-section or material of a beam) which satisfies constraints. You would define constraints, possibly have something to minimize or maximize (like...

The below is a leg assembly from the Antdroid open source hexapod robot (https://github.com/antdroid-hexapod/antdroid). The "femur" assembly connects the servos at S1 and S2. It is comprised of two side plates connected by cylindrical struts. Being fundamentally lazy, I prefer to redesign this...