# Questions tagged [design]

The tag has no usage guidance.

39 questions
Filter by
Sorted by
Tagged with
64 views

### Using multiple sources in Zemax mixed mode

In Ansys Zemax OpticStudio [I'm using 2023 R1.00 Pro (11)] sequential mode, the Multi-Configuration Editor can be used to make multiple paths for rays to trace through after the rays depart from a ...
• 31
67 views

### What is heard when a tuning fork is struck?

When a tuning fork is struck I hear two tones. From a distance I can hear a high octave frequency of the pitch of the tuning fork. Though, if I listen to it closely (closer to my ears), I also hear a ...
• 103
97 views

### Strength Calculation of a Simply Supported 3D rectangular beam Under Loading As Shown In Image Attached

For a 2D and 3D circular beam we can easily calculate the strength of beam and reactions using beam theory. The same can be used for 2D rectangular plate. Also for a 3D rectangular plate with uniform ...
57 views

### Diode laser optics - How to shape the beam of a Diode bar?

I have a 40w, 808nm, CS mount diode bar. I would like to build a something similar to a Rofin Dilas laser diode. How to choose the optics, measure distance, focus the beam into a fiber coupler? I came ...
1k views

### Calculating hole size on the side of a pipe

I have a fluid channel through which a fluid with known properties (viscosity, density etc.) flows at a known velocity with a known pressure and temperature and mass flow rate. The external pressure (...
144 views

### Frictional wheels without slipping (gear system)

In the figure below it is stated that the friction force should always be greater than the tangential force in order to prevent slipping between two frictional wheels. My question is that if we apply ...
• 113
724 views

### How to multiplex several light sources into one optical path? [closed]

I'd like to design a device that takes 4 channels of light from sets of LEDs and multiplexes them into one optical path, which finally creates a rectangle pattern of light that is approximately 30mm ...
• 51
1 vote
291 views

### Are soundproof foam shapes reflective of audio frequencies?

I came across a previous question regarding how soundproof foam absorbs sound: How does foam "absorb" sound? where the answer explains the properties of the foam itself rather than the shape....
• 47
1 vote
32 views

### Optics viewing angle and distance

Almost all optics like microscope, telescope.. require observer putting their eyes very close to the optics to see. Can the same optics designed so observer can see like viewing TV screen, i.e. from a ...
211 views

### Electronically controlled fusion reactor

It seems that currently, only two types of fusion reactor styles are being used for large scale testing: the Stellarator and the Tokamak. Both of these and a whole bunch of other designs have been ...
• 33
51 views

### Can light concentrated through convex lens be "cooled down?"

I've just been assigned this biology design project where I'm being tasked to create a device for maximizing "sunlight exposure" of crops and am unsure of this particular question, for the design of ...
1 vote
140 views

### Why does bike trip on the opposite side when turning the handle?

It can be observed on a stationary bike and also on a moving bike that on giving a jerk on the handle the bike leans to the opposite direction in which the jerk is given. Is it due to angular momentum,...
• 127
1 vote
23 views

### Slowing the late descent of an atmospheric probe in a gas/ice giant exploration [closed]

I remember the 1995 descent of the Galileo atmospheric module in Jupiter atmosphere. The robust casing made it withstand several dozens of bars of pressure before going out. What measures could be ...
• 11
1 vote
274 views

### Understanding hyperloop design

I am trying to understand some choices of hyper-loop designers. The effort seems to be focused on trying to bring a near vacuum (space-like) environment to ground level. Why would it not be easier ...
• 4,472
1 vote
523 views

### Measure force produced by air pressure in pipe system with valve

I'm attempting to design a system that uses pressurised air to shoot tennis balls and am struggling to find the right mathematics to calculate the necessary air pressure and volume needed to propel ...
829 views

### Tuning fork having 2 arms [duplicate]

Why there is 2 arms in the tuning fork? It can have 1 or more than 2 arms. If we think to create more resonance, then we can construct a tuning fork having many arms
2k views

• 145
42 views

### Reason for audio speaker diaphragm shape [duplicate]

Why are the diaphragms on audio speakers usually a cone with a dome in the centre? I don't know much about acoustics but my guesses would be: it just empirically sounds better, the design was found ...
• 121
1 vote
529 views

### How to design a Bitter electromagnet? [closed]

I am designing electromagnets at my home and want to know how can I design electromagnets at home. Bitter electromagnets are really a challenge.
182 views

### Alternative type energy storage to batteries? [closed]

When designing portable devices it is usually the battery that stores its energy, because it has a high energy density that allows even small batteries to run up to a year, given appropriate circuit ...
1 vote
471 views

### Fresnel Rhomb Retarder specifications

In my homework I have a Fresnel rhomb retarder and I am asked to calculate the retardance. I have the refractive index in terms of the wavelength(dispersion equation) and the phase difference incurred ...
• 317
673 views

### The strength and control over the strength of electromagnets, correlation between the strength and weight of the magnets

I am currently working on a project that aims to use the attraction & repulsion between two electromagnets as an alternative to weights, from a physiotherapy and rehabilitation perspective to help ...
1 vote
47 views

### What is "full clutching flow" in fluid-dynamics with regards venturi design?

As the title says, what is "full clutching flow" in fluid-dynamics with regards venturi design? I came across this reference a few times and can not find any further info on it, I'm currently ...
783 views

### From which side should I solder electrical feedthroughs into a vacuum flange?

I work on an experiment that requires electrical connections to a vacuum vessel, which is submerged in liquid helium (LHe). For sending the signals into the vessel, we use a feedthrough flange. I am ...
• 1,617
1 vote
197 views

### Design of atomic bomb [closed]

Please see the following photo. (I cannot post it) http://i1163.photobucket.com/albums/q554/startanewww/CIMG4548.jpg Why is atomic bomb in a "fish-like" shape? (I don't know how to describe it) Is it ...
• 43
4k views

### What is the best material and design for building a parabolic dish? [closed]

I'm currently using a homemade metallic spaghetti strainer with a wifi adapter inside it to increase my wifi adapter's signal reception, but would think that a different material, like the aluminum ...
• 113
1k views

### Can anyone estimate what proportion of water remains after I flush a toilet?

Imagine I have a clean toilet with some amount of water in the bowl. When I flush the toilet much of that water will be displaced by the tank's water. I want to work out (or model really) what amount ...
• 59
235 views

### How is/do they plan on having fusion energy collected at the National Ignition Facility?

I was just watching a program on television showing how the method they use at the National Ignition Facility to attempt to achieve fusion is to fire extremely powerful lasers at a small pellet of ...
• 911
226 views

### Proof Human Designs for Fusion Could Work

Are there convincing proofs on paper that fusion is possible the various ways humans are trying to design machines to do it or is the only way absolutely proven to work in theory also the only way ...
• 911
9k views

### Why do aircraft inner wings lose lift when turning?

first question here, so please be gentle! I'm reading an entry-level engineering course book and am currently up to discussion of aircraft design. There's one particular statement that is unclear to ...
• 207