Questions tagged [design]
Questions about or related to design.
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How can I determine the best thicknesses of a circular plate to achieve minimum weight and high strength?
I want to design a circular plate made from iron ductile material, So I want to determine the best thicknesses of the profile (t1,t2,t3,...etc) as shown in the image tyo achieve the best plate weight ...
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Designing a toilet for autoimmune protection: engineering question
In autoimmune disorders, when a bacteria enters the body, the immune system resounds, growing, fighting it off, but this immune system growth, due, to the autoimmune disorder, also attacks the person'...
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What's the best way to mount many clock hands on a custom clock?
I'm building a custom clock that requires 4-5 clock hands that need to move individually. I've designed it so the hand are to be mounted on telescoping brass axles (that have press fit gears ...
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Will a lid hovering above bursting air bubbles catch smog particles
The bubble bursting phenomenon goes like the above describes:
At 1, the air bubble is under water.
At 2, the bubble emerges above the surface, with a thin film of water rising to keep it from bursting....
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What is the name for a design element which includes trusses within a member?
I cannot think of what to call this design technique, where a truss-like structure is used within a member to provide strength and rigidity with minimized weight. I’ve included a picture which ...
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How do you calculate the energy released by a gas spring when it is released from being fully compressed?
I'm a Freshman Mech E Student, and I'm designing a 3lb Combat Robot for a club. I wanted to be weird and use something I've never seen on a bot before. It's a fun design challenge, but physics ...
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Help me choose an approach to gpu cooler design
I want to remake my gpu's cooler cause the original fans have a terrible bearing sound on low rpm and no amount of software solution helped.
Anyway, I want to use 3x nf-a9x14 pwm 92mm fans as its fits ...
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Could someone help me with this physics problem about water pressure
I am designing a rainwater collection system. Rainwater is initially collected in an open-top barrel equipped with filters and sensors. This barrel is connected to a pillow tank, a flexible water ...
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What software was this designed in?
I'm trying to to teach myself to design gears for a hobby project, and I want to make a similar design. I typically use Autodesk inventor, but I was wondering if there was something better for this ...
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Circularity symbol with datum?
I am trying to interpret a technical drawing that has a datum attached to a circularity GD&T symbol.
This page says that Circularity never has a datum reference. But this is a technical drawing ...
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Shaped charges and fluid dynamics
Watching this video https://twitter.com/Rainmaker1973/status/1713599092968787987 of objects being dropped into water and the resultant shape of the displaced fluid reminded me of videos showing how ...
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Figuring out thread (neck finish) for bottle cap
I've done a fairly large amount of googling on two different occasions trying to figure out what neck finish I have on a particular bottle thread I have here.
I'm in europe and this is for a plastic ...
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Would a conical-shaped solenoid be propelled by its interaction with the Earth's magnetic field?
I am wondering if the interaction between the magnetic field created by a conical-shaped solenoid and the Earth's magnetic field will result in this conical-shaped solenoid being propelled through the ...
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Creating a customizable high pressure extensions line for cga 580
So I'm trying to set up a keg on nitro. The way my room is laid out, id like to have the n2 cylinder far away from the regulator and keg. One side of this setup requires cga580 male, the other side ...
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How can I make sure that my outflow is the same as my inflow?
I have a basin that is 110 mm wide, 200 mm long, and 15 mm deep. The walls are 2 mm thick. It has water being pumped into it at a rate of 0.1078 gpm from one side. In order to ensure that this pan ...
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Braking system for a miniature ‘Drop tower’ rollercoaster
The tower itself is only max 400mm.
Designing the lifting system isn’t the problem but slowing down the gondola is posing a slight problem, any suggestions?
I have looked into using magnets but I can’...
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How does this fluid-fill stop mechanism work?
I bought an interesting shaped water fill-stop valve from ebay a while ago. Very convenient form factor, even though there was some forward pressure requirement.
I want to now make a custom version ...
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What would be the best capacitor to use for a railgun that uses a capacitor as the projectile?
I have had a long-time interest and fascination with railgun technology and for a long time I have wanted to build a small-scale, simple railgun as a scientific experiment. This railgun is designed to ...
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Dual Axle Tiny House Trailer Build; Question About Structural Integrity of Trailer Design
I have questions about the fabrication of a tiny house trailer I am building. The questions are focused primarily whether I am adding enough cross supports.
My overarching design principle:
That of a ...
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Drone Geometrical Shape
Drone
Can Drones be designed with geometrical shapes viz Kite, Cylinder, Sphere etc?
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Which design is most resistant to tipping against 90 degree downward force?
Have a question sort of related to question at (What calculation to find how much force before tipping over?) but with slight modifications.
Trying to weld some tubing together and onto a heavier base ...
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High speed linear actuator/motor design
I need to make a linear actuator to compress a spring 80mm in 0.1 seconds. This is a speed of 1600mm/s. It takes around 15kg of force to compress the spring. How can I design a linear actuator for ...
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Do I need a pressure relief/safety valve if my pump can't exceed the rated system pressure?
I am designing a resin dosing & mixing room for a production plant. This will use pneumatic diaphragm pumps to pump the resin & additives, flow meters to measure the dose, and pneumatic ball ...
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How are springs that are designed for 100% extension different for ones that are designed for 60% extension?
Some trampoline springs extend only 40-50% before reaching their elastic limit. (e.g. a 10 inch spring can extend to 14 or 15 inches. Good springs can extend to 100% (E.g. a 10 inch spring can ...
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What are the external bars for on bank vaults?
I refer to the 3 radially spaced bars on this door:-
and the two horizontal ones on this door:-
Many (vault) doors have them, but since they're on the outside, what purpose do they serve? It looks ...
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Is rain like bullets at supersonic speed?
https://web.archive.org/web/20230719190548/https://aviation.stackexchange.com/questions/100037/is-rain-like-bullets-at-supersonic-speed
https://m.youtube.com/watch?v=Nv6ZqpM-5dY
The video (a marketing ...
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Steel to aluminum structural equivalent
I am trying to build an aluminum trailer on an airbag suspension. The plans are for a steel frame and we are looking to construct it out of aluminum to save weight due to towing limitations. Not sure ...
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How to design a spherical wrist for a robot?
I need a spherical wrist - where last 3 DOFs have axes that intersect - for a 6DOF robot arm, but I can't imagine the mechanics of 3 servos + brackets with intersecting axes.
Is this even possible?
...
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What is collapse multiplier in OptumG2 software? How to reduce the error percentage for calculating active Earth pressure?
I am working on an analysis of a retaining wall. After doing a limit analysis on the structure, the collapse multiplier that I am getting for both upper and lower limit is very high. As it is not ...
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How do you go about picking a belt in design?
So when you want to pick a beam to use or determining the thickness of a load bearing beam, or picking bearings, there is some calculations you do to see if its life expectancy or f.s or to see if the ...
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Effective Designs for outdoor clothing elevator free from walls
A strange question, but I live in a building (gringo in Mexico City) where the only area you can dry clothes is in a set of chain-link cubes on the roof. However, those cubes are about a story and a ...
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slits and slots
We are designing a part such that it is clamped. We are providing a slit for tube insertion. I need to know how much depth and width we can provide the slit sizing. Here I am attaching the slit image.
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How do you design a trampoline from scratch? Or rather, how do you learn how to design....?
I've asked similar questions here before, but I'm looking for a more 'meta' answer.
Given a niche in mechanical engineering, how do you find out what the current state of the art is in terms of design?...
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How to determine the performance index M for the outer vessel of a vacuum bottle? Need help with objective and constraint selection (Ashby diagrams)
I'm reaching out for assistance and advice regarding a problem I'm encountering in my thermal bottle analysis. I have been attempting to determine the performance index M but facing significant ...
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Finding alternative for Metal bolted joint in Plastic part
I am developing a design for HDR Brachytherpy interstitial Template that has to be completely in plastics. There is a shaft of 25 mm and length 130 mm, which is held by a plate of 10 mm thickness and ...
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rows of lights with steel rope (rigging wire) - 12 m between stainless pipe structure and concrete wall
Hello Engineering Stack Exchange.
I have been asked by a friend to hang some lights in a space beneath an arched bridge. The bridge is protected so no holes can be drilled into the arched stone; but ...
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What does this line with cross means in the blueprint?
In this blueprint, there's the line with a cross with diameter of .115 at the far right side.
What does this line means?
Does it means that the section with length ...
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How to calculate the force required to move this pawl that swings on a pin?
The structure (pawl) is rotating about a pin and is pushed forward by a spring. I want to calculate how much force it requires to push the pawl forward with the spring. Since the spring is only ...
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NOx emissions in diesel engines
What are the specific challenges and potential solutions for reducing NOx emissions in diesel engines without sacrificing fuel efficiency, considering the trade-offs between various aftertreatment ...
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Capture an Impulse (As Opposed to an Impulse Response)
I want to see if there's a method by which you could capture the characteristics of an impulse source, rather than the response of the system to the impulse.
Normally, when attempting to capture an ...
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Engineering graphics for robotics
I am intrigued by robotics and wish to pursue it with a fundamental approach. Could you recommend some valuable courses, links, or books that can help me begin my journey in engineering graphics?
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Determining bearing pressure between mating convex and concave conical surfaces?
(In the illustration above, the "Collet" piece in the middle is a bushing)
I'm designing an axial linkage of sorts, and I'm having trouble finding resources, theorems, or guidelines for ...
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Lifting a table using linear rails and linear actuators
I'm trying to design a coffee table for a tightly constrained space that can lift up to become a dining table. I've drawn the CAD for this design, but I'm concerned that the moment arm on the linear-...
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Autocad Change Properties for All Object
Does anyone know how to change the Vertex X and Vertex Y value for all of the dots? Because some of the red dots has a different vertex X and Y value which also causes the shape to be slightly ...
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What design could fit this egg drop challenge?
My class is doing the egg drop challenge as a school project, but the rules are a little different than normal. First of all, the construction needs to contain a microbit connected to a battery pack ...
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Looking for book/notes about designing rotatry indexer cam
I'm looking for a book/notes about designing a rotary indexer like in this video (the first system until 34 sec):
https://www.youtube.com/watch?v=2atiOFA-qnQ
For example, I need table= top plate with ...
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How can I calculate the bending and compression stress on my pawl?
I am working on a project where I am designing a linear ratchet and pawl locking mechanism for a lift. The pawl is going to have to withstand 6000 lb of weight that is going to be transferred by the ...
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Replicating an impact impulse
I am building a test-rig for a device. I have operational data showing the device experiences impact loads resembling a half-sine pulse with width dt and magnitude F. The test rig's purpose is to ...
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Residential 120V AC vs 12V DC
Can I repurpose residential LED lights (slim, 120V recessed) for my RV by directly providing them with 12V DC power, or is a more accurate approach required to bypass the existing circuit board?
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Force applied on a ferromagnetic shaft by a coil
I have a perfectly cylindrical ferromagnetic shaft (say, made out of iron). I want to apply an axial force on the shaft (along the centerline of the cylinder) using a coil through which an electric ...
