Questions tagged [design]
The design tag has no usage guidance.
284
questions
3
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2answers
54 views
Why rectangular windows are so common?
Most of the windows in our rooms are mostly rectangular.Why don't we chose any other shape like circle,triangle or a trapezium.Does it affects airflow through room?
Is the reason is that they look ...
1
vote
1answer
17 views
what impact does drop height have on powder segregation?
In the pharmaceutical environment, the drop height from the hopper to the area where it collects must be minimized. Tubes can be used to minimise the height. I know that it affects powder segregation. ...
0
votes
0answers
12 views
N2O/Kerosene Rocket Fuel
I am interested in building a small liquid fuel rocket and I have decided to use nitrous oxide and kerosene as the oxidiser and fuel respectively. I would like to know if anyone has any advice ...
2
votes
1answer
71 views
Buying Liquid Oxygen in Small Quantities
I am trying to work out costs and order parts for a small liquid fuelled rocket I have designed. My oxidiser is liquid oxygen but I can’t seem to find anywhere to purchase it on the internet. Does ...
0
votes
2answers
36 views
Designing a loaded voltage divider?
I was wondering how to design this circuit in depth, since I have no idea what to do.
1
vote
0answers
22 views
gear design.improving gear strength
For improving the gear strength, which one is better based on manufacture and economy? Increasing module or increasing N? With the same surface strength.
0
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3answers
33 views
Press brake tooling for 360 tube?
I’m trying to find out if it’s possibly to form a cylinder or tube with a diameter of 1 inch using some kind of curling die for a press brake. I’ve seen dies that make small 360 degree bends like that ...
0
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0answers
21 views
Optimization of ash stockpile height to minimize haul truck fuel costs
How would I find out the optimum height of an ash stockpile in order to minimize diesel haulage costs, for a CAT haul truck?
My stockpile height is required to be between 25m to 50m.
I have worked ...
0
votes
1answer
20 views
ElectroMagnetic Pulling Force fdropoff with distance
I am looking make a quick and dirty test ring using an off the shelf electromagnet. My force needs are small, less than a pound but I need to do so in a non contact manner. I know these magnets are ...
0
votes
1answer
33 views
How to design a magnet to handle a known force?
There is a metallical structure. I can estimate how much steel are in it. I would like to know how tall/strong a magnet should be to maintain a certain object to the metallical structure.
The object ...
0
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0answers
21 views
How to connect a cable comb to a metal panel?
I have some cable combs, that looks roughly like https://images-na.ssl-images-amazon.com/images/I/71OiqN4CP1L.SL1100.jpg except with a flat bottom, cut from acrylic (ideally 5mm thick). I need to ...
0
votes
1answer
25 views
Slab Stiffness Modifiers applied in Vertical Elements design but not in Slab design?
Why in the design of vertical elements (columns and walls) for a structure against lateral loads (such as seismic and wind) we use a slab (or shell) with a stiffness modifiers (such as 0.25 according ...
0
votes
1answer
25 views
Drop Panel Design Above Columns?
How to design a drop panel at a column in case the column above is rotated or not aligned to the below column (see image below), the code that i am using is the ACI Code if any reference for the ...
1
vote
1answer
39 views
What are the essentials of a good PRD (product requirements document) for a new mechanical device
I need to write a non technical product requirements document for a new machine that I want designed.
I need to write a PRD, and I need to ensure that I have included all the salient information, ...
0
votes
1answer
26 views
Friction factor for wormgear design materials
I'm working on a database which involves geometric design parameters, forces analysis and efficiency and losses for wormgear reduction design systems.
To determine the tangential and axial forces ...
3
votes
2answers
1k views
What is the difference between washer and O-ring? what is their advantages over the other?
I am designing a hydrophone, from the piezo buzzer. To hold the circular piezo plate, I have designed a mechanical fixture. I need to use washer/o-ring to make it leak-proof. I am confused about which ...
0
votes
0answers
21 views
How can I model two attached rotating rings?
I am trying to model an object in which there are two rings who are attached to each other and can rotate independently along the Y axis (see attached image).
The object needs to be machined and not ...
0
votes
0answers
8 views
How to calculate new focal plane position when adding a lens to a lens system?
I am currently struggling with some lens equations. I hope this is the right place to ask such questions.
What I'm trying to accomplish is to add a separate single lens to a camera setup and ...
2
votes
0answers
35 views
Is an Adjustable Stiffness Flexure Spring possible?
I have recently discovered flexure springs (see image below), and I am interested in using one in an amateur project I am building.
However, I would prefer if I am able to adjust the "stiffness" of ...
0
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0answers
33 views
Matching Air blower CFM vs HEPA filter CFM, and ΔP in WG, for laminar flow design
I am trying to build a laminar flow box using instructions at these YouTube links for design and build.
They recommended getting a Dayton squirrel cage air blower model 1TDU2 rated at 1202 CFM. The ...
0
votes
2answers
57 views
I've never seen this type of flexible coupling, can someone tell me what it's called?
Putting together a project, I've found this clutch but I've never seen this type before. It has a sort of flexible plate connecting the two parts, attached to both in two places corresponding to where ...
1
vote
1answer
75 views
Could boiling water inside a semi-enclosed pipe be a low-cost method for a silent marine propulsion system? (redesigned)
I am wondering if boiling water that is trapped inside of a semi-enclosed pipe would be a low-cost method of creating an underwater thruster that would function as a silent marine propulsion system.
...
0
votes
1answer
39 views
ANSYS Design Modeller more significant figures
I need to just get the volume from ANSYS Design Modeller but I would like a higher number of significant figures rather than just 5 (See picture).
How do I do this?
Thank you for your help!
0
votes
0answers
22 views
How to detect milk spillage or milk boil?
In my country we generally boil milk before we drink. Often the milk heats up and spills from the pot. I want to detect milk boil before it spills off.I am thinking of a thermal camera solution that ...
0
votes
2answers
53 views
Designing a 1-button system allowing for a differentiated control of 2 different valves?
I'm in the processes of building something which requires I'll be able to control the independent opening/closure of two (small, ~10mm in diameter) different adjacent holes using one finger, and I'm ...
0
votes
1answer
37 views
Master/Slave Gear Mechanism for Navball
I am designing a functional replica of the Apollo FDAI (aka 8 ball).
See pics Real FDAI Another view
From the Apollo 8 Flight Journal:
The FD/AI (Flight Director/Attitude Indicator) or "8-ball" ...
1
vote
1answer
37 views
Designing Block Diagrams For Control Systems
I'm looking for good software to design control systems, and more specifically to neatly design "block diagrams" for control systems.
Is there something like that?
0
votes
0answers
17 views
Help finding connector to fit 1 3/8in / 35mm mounting flange on horn driver
My project is a DIY talkbox using Monacor KU-516 compression driver.
I'm having a hard time finding the right connector to fit the hose to the driver, M35 is a rare size it seems.
There's one ...
0
votes
0answers
87 views
Machine Frame Design
How do I select the cross section for a machine frame? Do I need to refer to the AISC steel construction manual to find the capacity of beams, columns, etc?
2
votes
1answer
25 views
Spring Industry Naming Convention
I am currently prototyping a part for a personal project. My CAD design was contracted out and there are some off the shelf parts that I need to order per the design (springs, screws, etc.).
My ...
0
votes
3answers
33 views
Design of Gating & Runner system in Gravity Die Casting
How to design gating and runner system in permanent dies so that material flows smoothly throughout the design without spilling back from the gating channel.
What should be the shape of gating system ...
0
votes
3answers
31 views
Bonding PVC Cables To Metal Housing
I have thin, variable diameter PVC wires that run along a metal housing. Problem being, they can get pulled on and disconnect. I want to bond them down to the metal housing as a sort of strain relief ...
-1
votes
1answer
77 views
How do i find the effective length factor (k) for a column from this chart?
I need to find the effective length of a column (kl) from this chart which can be found in the "design of concrete structure" By Dr. Arthur Nilson.
the question states "if Psi top is 1.5 and the ...
0
votes
1answer
29 views
Selection Of coupling and determining size of motor to rotate heavy disc
Following image is something I want to design. The uniform stainless steel round plate of diameter 1000mm and thickness 10mm is rotated by a stepper motor. But after every turn, a pressure of 3000 kg/...
3
votes
1answer
81 views
What mechanism do I use for this pen-like design?
I am trying to make a pen-like product that moves out fluid from its tip for some special chores, but I am having issues about the motion of the clutch. The picture you see is a sectioned concept ...
2
votes
1answer
62 views
Buckingham-Pi Dimensional Analysis when there is a non-dimensional parameter: How is it accounted for?
I am in the process of completing a design project for my fluids course in which Buckingham-Pi /Dimensional Analysis is needed to find the optimal parameters needed to achieve a rotational rate of 120 ...
0
votes
1answer
70 views
Pneumatic-based, paddle wheel-type lifting apparatus for aircrafts
I am wondering if a pneumatic-based, paddle wheel-type lifting apparatus would have any practical application within the aeronautical or aerospace fields.
Please reference the conceptual drawing ...
1
vote
3answers
82 views
Dead mans brake on a hand-pushed wheelchair
Would it be possible to install a dead-mans brake on a wheelchair?
I have been calling around and wheelchairs do not seem to come with a dead-mans brake. With that i mean the brake found on airport ...
0
votes
1answer
46 views
Use 4 to 5-second timer to disengage/engage mechanical system
So I am working on a project. I need a drone (quadcopter) to ascend for 5 seconds, then cut off power to the drone, then let it stay in the air for as long as possible without power. My idea for ...
0
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0answers
31 views
How to change the direction of the force with a high resolution
I have a sample of 600 milligrams which is supported by a rope. So the force is in the vertical direction. Now I want to change the direction to the horizontal direction while keeping the force equal(...
0
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0answers
28 views
Will a video projector submerged in mineral oil still work?
I’ve seen folks submerge computers in mineral oil to cool them- but would doing the same to a video projector profoundly throw off its internal optical aspects? I’m considering one of those small “...
0
votes
1answer
57 views
Why vehicle horns are tuned to consonant intervals?
The primary purpose of a vehicle (car, locomotive, etc.) horn is to warn other traffic units that something potentially dangerous is about to happen. And so, others must pay attention to the signal.
...
5
votes
1answer
84 views
Should the corbel angle always be estimated as 60 degrees in masonry construction, or is there a formula to use instead?
In educational construction material as well as engineering publications, the corbel angle for significant excess loads, and also for substantial openings, in an ordinary brick wall is usually ...
0
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0answers
40 views
Design assistance
How do I make that encircled pattern in AutoCAD 2018 without going through a lot of hassle? I mean those thin lines indicating that the object has been cut.
Looking forward to all positive responses.
...
0
votes
1answer
59 views
Regarding design of fixation of a part
I would like to know if there is any theory behind designing the fixation for any part. To optimise the number of mounting holes and fasteners.
If so what is it called and where can I get it?
Please ...
0
votes
0answers
28 views
Screw Cap design for high pressure surge vessel
I'm designing a pressure vessel with a relatively large cap that provides access into the vessel, what recommended thread specifications is needed to maximized locking and safety against faliure or ...
0
votes
1answer
30 views
How to model a driven wheel with no slip
I'm working on a design problem, and I'm having trouble figuring out how to model the torque needed to drive a bike tire at a set acceleration.
Let's say I have a tire with normal force between tire ...
0
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0answers
31 views
Designing a submersible cooling system for rapid flow hot nitrogen gas [duplicate]
I'm trying to design a cooling system for cooling nitrogen at 300°C. My original design (which is very open to modifications) is an aluminum ring block with exterior fins and vertical holes through ...
4
votes
3answers
104 views
How are dangerous to build things studied?
How are dangerous to build things studied?
Such as, nuclear reactors, jet engines, sawing machines.
How do engineers discover, how they ought to be built, while avoiding getting or getting others ...
0
votes
1answer
60 views
Designing cylindrical cam
So I need to design a cylindrical cam (aka barrel cam I think). I'm an aerospace engineer so I've never had a course on cams/gear design (wish I had though). Is there a general equation for the curve (...
