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Questions tagged [design]

Questions about or related to design.

538 questions
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Do longer gun's barrel improve accuracy?

I have been reading a lot about guns in Wikipedia. I know much of the terminology of firearms. However, I was wondering why some firearms such as shotguns and rifles have very long barrels opposed to small handguns such as revolvers and pistols,…
Santropedro
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How to prevent algae in water cooled laser tubes?

I recently got a laser that is water cooled via a couple of clear plastic tubes (about .5 cm diameter). I have heard it can happen that algae or other undesirable inhabitants can get into such tubes and cause problems. I have also heard that…
Yly
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Is this dropout design as bad as I think?

I bought a 1990's steel mountain bike a few weeks ago and I have some concerns about the design of the rear dropout, pictured here: It seems to me that an ideal dropout design would redirect upward force from the wheel axle toward the ends of the…
Morgan087
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1 answer

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. But do not understand the mechanism of it. How…
user307640
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Engineering Solution for river cleaning

Sorry if this is the wrong exchange, if it is could you point me in the right direction that'd be awesome! I have a bit of a problem locally that I think there could be a simple solution that we're not seeing. I'm part of the local volunteer group…
Shaun Curtis
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dimensions for electrical outlet faceplate cutout

What are the dimensions for the cutouts in an electrical outlet faceplate? I need to add several outlets in a sheet metal covering but I cannot find the dimensions or a dxf to use for the shape. The closest I've found is the following image from…
user319862
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How to make a wire turn with a turbine head

I have an outer pipe and an inner pipe a lot smaller than the inside of the the outer pipe, and the head of the (mini) turbine will be connected to a metal rod. There will be wires connected to the head and it will be turning to the wind. How should…
David C.
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Knuckle Joint: compressive strength equal to tensile strength

I was studying the design of joints and came to knuckle joints. Generally compressive strength is greater than tensile strength, but considering knuckle joints compressive strength and tensile strength are considered equal (as mentioned below).…
Fennekin
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Optimal curvature for a gooseneck stand

Can you suggest the basic principles for optimal neck adjustment of a gooseneck stand such as the one in the image? I'm looking for the curvature that will offer greatest mobility and stability, while also being versatile for different positionings…
alstax
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What function does this device perform better than a flat, horizontal bench?

I am curious to understand the engineering and design principles behind this device, which I will refer to as the half-assed rest, because it seems to be an inferior design of a normal chair or bench. It seems to be designed explicitly to be hostile…
Bigbio2002
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Why does the BlueROV2 have three clcokwise and three anti-clockwise propellers?

If we look at the Bill of Materials of BlueROV 2 they have written the thrusters separately as clockwise and anticlockwise. Why not use Reverse config. ESC instead of anticlockwise propellers?
TMRT
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How may I design a centrifugal fan?

I have customized a fan for our centrifuge. How may I design it? Can you recommend me some software / resources ? These are the the specifications: Type : Radial Capacity : 5000 Nm3/h Head : 100 millibar Speed : 2925 RPM
Amirreza
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Principal on gaining more height based on nested poles?

How do people design height gaining based on nested poles ? Consider this picture (I made them) : If I want to achieve height based on these 3 poles, how they should behave? Is this how the behave? I had been searching over the internet I haven't…
Plain_Dude_Sleeping_Alone
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shear force calculation with velocity and mass

I have made Image which is self explanatory. It has the question Suppose I have a metal plate that is travelling at V m/s. A stationary body acts as a shearing body. When the metal plate contacts the still body, it starts to shear off. The plane in…
Fennekin
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Need help with VHDL

Game Design Let us create a little game with a seven-segment display (SSD). There are two inputs, “clk” and “stop”, and one output “dout(6:0)” that feeds the output to the seven segment display as shown in figure 3. Assume that the clock frequency…
Melinda Georgia Brown
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