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7 views

Are ceramic materials suitable for making locking lugs for guns?

Since ceramics are resilient to shear loads, could one make locking lugs in a gun out of them or will tensile loads also be present leading to failure of such lugs? Also, could those tensile loads be ...
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1answer
5 views

how can I solve this error in c++: Exception Unhandled?

I am new in learning C++. I have used this code to show an image, but there is an error that I do not understand! This is the simple code: include iostream include conio.h include opencv2/core....
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1answer
10 views

Question about flow temperature and storage temperature in a cogeneration plant

Let's assume I have a cogeneration plant that produces heat with a nominal output. The heat is given into a heat storage tank, which is filled from above. The maximum flow temperature of the ...
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0answers
8 views

Is it possible to have the load cell signal as feedback to the servo drive of the servo motor?

In my project, I have to control the linear motion in one of the two modes. It will be either position control or load control. for the displacement control, The servo motor takes the quadrature ...
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0answers
6 views

Unrestricted Cockswain

Hello I am researching first millennium BC Nile freighter rudders. They sailed upstream and came back down with the current. The Greek writer Herodotus tells us that going downstream they were towed ...
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1answer
29 views

Significance of asymptotes in root locus

What is the significance of asymptotes in the root locus of a linear time invariant system. Does it say that for that particular pole on which it is starting doesn't have a practical pole in the ...
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1answer
25 views

Criterion to neglect poles of higher order

If I am having a fifth order system, it is said that the dominant two poles nearer to the jw axis determine the nature of the output, is there any criterion to neglect the other three poles , should ...
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0answers
7 views

Finding exit velocity from a compressed CO2 canister

I’m trying to find P3 and v3 (exit velocity and pressure) to plug into a CFD simulation, but I’m having trouble finding v2 and P2 (velocity and pressure before the valve). I’ve looked online and many ...
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0answers
7 views

Where can I find a list of building codes to put on a set of blueprints for a addition

Most architectural companies have a template of blueprints they reuse for every project. As an owner-builder, I need to make these blueprints from scratch On page 1, I have to list all applicable ...
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1answer
87 views

Difference between permanent magnet and electromagnet exciter generator in principles wise?

I searched about this, but couldn't find any helpful explanations. All it says is that magnetic field is generated by either permanent magnets or electromagnets. In both cases, how does the exciter ...
2
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2answers
152 views

How to prevent screw from loosening?

This is a clevis made for linking the tie-rods to the steering rack. This part is under dynamic loading and is getting loosened. We tried using jam nuts but it did not work well. Due to loosening the ...
0
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1answer
43 views

Calculate Rolling Resistance Experimentally

I am trying to calculate the exact rolling resistance ($F_{rr}$) of my car. The approach I am going with is a coastdown test at a low speed so no drag slows down the car. From there I am going to ...
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1answer
22 views

Can a “surface drive” propeller be submerged if induced supercavitation reduces water surface area?

Assuming induced supercavitation (like Supercavitating torpedo and Juliet Marine Systems Ghost) reduces water surface area does that reduce friction enough to submerge a surface drive propeller ...
4
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1answer
268 views

On a Diesel/hydraulic DMU train what exactly does the “go faster” lever control?

Let's say that you are driving a Diesel Multiple Unit† with either mechanical* (i.e. an actual gearbox with multiple ratios) or hydraulic (i.e. two or more torque converters) transmission. When you ...
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0answers
12 views

Linear Motion Ratio on Eccentric Cam Pulley

If you have an eccentric pulley wheel and attach a rope to the top most vertical position and pull downward, the point at which the rope is fastened inscribes a circle with the radius of the distance ...
1
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1answer
17 views

Drained and undrained shear strength of clay correlated?

When we measure the undrained strength of clay via CPT or triaxial test for instance, is there a way to correlate this to drained strength? How? I ask because measuring drained strength takes very ...
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0answers
15 views

Calculating flow rate of compressed air to push another liquid out of a tank at a desired flow rate

I am working on a system for a university project which uses pressurised air to eject the contents of a tank through a pipe into the atmosphere. I am working on figuring out the flow rate and pressure ...
0
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2answers
73 views

Straight Pipe Thread

Is there any National Pipe Thread Straight (non-tapered, requires O-ring or compression olive) that is compatible, even loosely, with a machine thread threaded rod? I want to put a reducer on the end ...
0
votes
1answer
19 views

Bendable flaps on sheet metal

I'm trying to cut some bendable flaps on aluminium sheets for hooking/clipping onto some fabric. The flaps I have in mind look like this: Are these common features? Does anyone know the geometry of ...
0
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1answer
83 views

Z-axis auto adjusting fixture device

I am looking for a mechanism that would allow me to support a fixture attached to a 3-axis motorized stage. I have attached a picture of my current design. I trying to design/incorporate some sort of ...
0
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1answer
60 views

Aluminum tube vs steel

Our question is what size and alloy aluminum tube can be used to replace steel tube in a vertical load application. Our current spec is 1.5” OD STD steel tubing 7 feet long. We will use 6 poles ...
0
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1answer
22 views

Help with linear rod drill press like design/materials

I am putting together a basic machine for “pad printing” extremely small and precise parts. The design is very much the same as most homemade drill presses and consists of linear rods, flanged ...
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0answers
12 views

Can a motor work within the center of another motor without magnetic interference or confliction on the rotors?

I'm imagining if it's possible to design a motor within another motor without having the magnetic field produced by one interfere with the other or their effect on the rotors conflicting? Can it be ...
0
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2answers
16 views

grey cast iron from freezing point to room temperature (cooling process)

Do grey cast iron expand from freezing point to room temperature (cooling process)?
1
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1answer
49 views

What are the benefits of a digitally controlled TIG welder?

There are "analog" TIG welders where the parameters are directly controlled by rotary knobs and buttons. For example this one. Then there are "digital" ones where parameters are controlled by one ...
0
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1answer
36 views

Forces on pruning shears

I am trying to find the forces in hinches $B$, $C$ and $D$. The exact solution is not important for me. I introduced the following internal forces to solve the problem: $A_y$ in $A$, $B_x$ and $B_y$ ...
0
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1answer
21 views

How to constrain stepper motor inside case?

I have a stepper motor linear actuator assembly like this for example, but the stepper shaft seems able to move axially back and forth - hence when I change direction it has to do a few rotations, ...
1
vote
1answer
29 views

analysis of PD controller vs static-gain

I have a plant $G(s)$ which gives position and velocity as output $$ G = [G_{ru}(s)\quad G_{vu}(s)]^T $$ where $G_{ru}$ is the integral of $G_{vu}$, and $u$ is the input to the system. Now if I want ...
1
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1answer
40 views

How to calculate initial concentration of first-order reaction in CSTR?

(This question comes from a Chemical Engineering background, but basic Math and Programming knowledge is also required. I hope it still falls in the scope of engineering.stackexchange.com If not, ...
4
votes
2answers
2k views

Can we build a tool that measure curvature on an arc?

I know some biologist that are taking curvature measurements on photos with softwares to understand the variation on beak morphology. I'm wondering if there is a way to build a mechanical tool (or ...
0
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0answers
28 views

How do I to connect aluminium profiles with 60 and 120 degree angles?

I would like to construct an aluminium profile frame which includes connections with stiff fixed angles at 60 and 120 degrees. What options do exist for creating those connections, preferably without ...
2
votes
1answer
47 views

How to solve this linear motion problem?

Context: I have a lead screw rod, nut and a pulley aligned vertically. The nut is attached on top of the pulley so their respective bores are aligned and the rod is arranged so that it is threaded ...
0
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1answer
17 views

Trim parts against parts in assembly level solidworks

In solidworks , is it possible to trim a part against another part in assembly level
-1
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0answers
24 views

Latest simulation software to design motorcycle

Manufactures do a lot of research into finding where exactly where they want the centre of gravity to be based on the weight of the engine and fuel tank. To make ...
0
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1answer
43 views

Designing PVC structure

I am an electrical engineering student that wishes I could have taken some civil engineering courses. Anyways I'm trying to design a pvc structure that I will use as a somewhat complicated room ...
-1
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0answers
24 views

How is d(Cl)/d(alpha)@stall and Cl increment to stall defined in Xrotor?

Edit: Someone answered me in the original post overhere. ;) I hope there are some people around here with some experience in Xrotor than me. (Xrotor is:"XROTOR is an interactive program for the ...
1
vote
1answer
24 views

Can a car's Electronic Stability Control (ESC) operate using electromagnetic braking?

The Wikipedia article for ESC describes the process as using hydraulic anti-lock brakes. However, is it possible for electromagnetic braking to be used instead, with an electic motor/generator in ...
0
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0answers
13 views

Is it possible to grayscale a MPO file (3D camera) for a CNC carving

I had/have a 3D camera back in the day, and I gotten a few pictures. I kinda stopped using it since there wasn't anything I could do with the MPO files. However, the camera might gain a new life if I ...
0
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1answer
40 views

Is there a relationship between depth/diameter/etc… of meteoric craters and the strength (eg:compressive strength) of the target material (sand…)?

So I am trying to write a high school research paper (3700 words) on the topic above. I am not sure if there is such a relationship, but I think intuitively we can agree that different materials will ...
2
votes
2answers
137 views

What is an engineering term for this type of arm

I'm trying to describe a part - it's an arm that holds an axle sleeve (which ultimately holds a wheel). I'm stuck right now describing it simply as a "wheel arm", but was wondering if there was some ...
1
vote
2answers
26 views

How to convert output of controller (control signal) into PWM signal?

I am trying to control a mechanical system with some transfer function T (output is position & input is voltage). I have implemented a state feedback controller in order for the output of the ...
2
votes
2answers
157 views

How to Find Drag Force from Skin Friction

Just wondering if someone can please can give me some idea, as to how I can solve this question that is not related to current study. I haven't been able to work out where to start with it just yet. ...
8
votes
2answers
129 views

Can high alloy tool steels be quenched in brine?

It is will known that most of tool steels are quenched in oil to prevent cracking and distortion which appears when quenching in water due to non-uniform cooling caused by formation of insulating ...
1
vote
1answer
53 views

Car's shock absorbers' damping ratio

I'm trying to find a suitable shock absorber for a small ATV with a specific value (to be determined later). But everywhere I look, no one seems to be giving the damping ratio of the shock absorbers. ...
0
votes
0answers
18 views

I need a mechanism/method to control a shaft that can rotate at different speeds. (faster clockwise and slower anti-clockwise)

I need to develop a mechanism - Where in I have a shaft that needs to rotate at different speeds. Lets say at a higher RPM clockwise and a lower RPM anti-clockwise. This shaft is attached to my ...
1
vote
0answers
16 views

How do nuclear power plants prevent fuel rods from depleting nonuniformaly?

Power output of nuclear reactors is controlled by control rods that sit in between the fuel rods: These are pulled out to increase fission rates - and lowered to decrease them. The control rods are ...
2
votes
2answers
57 views

How do I determine what hardness to change the bearing or the track?

We have a project that requires us to use a qty of 4, Ø2" yoke roller bearings mounted two per side on a trolley that roll on a steel track. The maximum total weight that we estimate on the track at ...
-1
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2answers
66 views

The Cavitation Problem

I'm new here and would like to ask where the cavitation would happen in my design. Thanks
1
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1answer
62 views

What wheel setup on a small, solar powered car, would have the least rolling friction?

We are attempting to design a solar car. The solar panel 4 1/2" x 13". I like to break these problems into their simplest form, in order to eliminate the least amount of possibilities. So, the goal ...
0
votes
1answer
36 views

How can I tune the parameters of a lqr controller?

From my internet research, it seems there's no systematic way of tuning the design parameters for the LQR controller. I have found Bryson’s rule as an initialization. However I don't know how to ...

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