# All Questions

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0answers
9 views

### What plastic material is best for a snap-fit design?

I'm designing a plastic holder that will secure a metal part with snaps. Which plastic will be able to take multiple removals and re-insertions without getting weaker (bent out of shape) over time? [...
0answers
5 views

### What type of engineer/professional designs hydroponic farms?

What kind of professional/architect/engineer builds agricultural systems, specifically automated hydroponic systems? Things such as growing, cultivation, lighting, plumbing, harvesting, processing ...
2answers
29 views

### NASCAR corners on public roads

Why don't engineers build highways with corners such those on NASCAR speedways?
0answers
11 views

### Phrase to describe products that meet “test for” standards?

Often in the case of safety related products - My example is EN54 Fire detection and fire alarm systems. For a product to say that they comply with this standard, the product has to be tested and ...
0answers
10 views

### At which stage can borate solutions be injected to metallurgical coke?

Borates are effective to increase CSR of metallurgical cokes so that can be added to the metallurgical coke in the process, which place is best for this belching process? Coke ovens? Coke ovens (...
2answers
20 views

### Mounting an antenna base on a roof using only double sided tape?

I want to put a vertical antenna on top of my roof. The antenna is basically 4 meters of PVC pipe and 5 meters of 19mm aluminium tubing. The roof at my house is corrugated sheet metal, and I want to ...
0answers
17 views

### Safety of a 4inch wall

One of my house's wall is 4inch wide. My house has one room . and other is lobby that is fully covered by roof. Its wall facing the outside road is 9inch in width. But one wall of it facing to our ...
0answers
13 views

### Determining the minimal needed wall thickness between two bores in a control block

Given a control block of simplicity with only two bores. These two bores could be parallel or just could be very close to each other at a specific point in the control block. The material of the ...
2answers
23 views

### Why do we analyse frequency response for step inputs?

In my class I'm in, our lecturer presented frequency response methods such as the nyquist plot and bode diagrams. Then when designing a lead compensator later, he said one of the specifications should ...
1answer
23 views

### Why do pitching machines use wheels and not solenoids, actuators, servos or peumatic cylenders?

I guess that generating movement is harder then keeping a wheel rolling, but in terms of power consumption is it possible to compare the power consumption of a motor for driving wheels to that of a ...
0answers
27 views

### Refute this wtc argument?

A wtc size plane impacting a 100m2 area would have under 100mpa of force. Isn't that irrelevant? Is the fire more important than the impact?
1answer
25 views

### What is the manufacturing method used to make aluminium C channel

I don't know how this is made and I don't know the name of the method to search for it to learn more.
0answers
33 views

### Is this space elevator idea plausible?

https://imgur.com/yU8ttVq A better Space Elevator idea: Here is my revised space elevator idea. This variation of the space elevator concept solves the flaw in most designs because it doesn’t ...
1answer
30 views

1answer
34 views

### What is the voltage at the ground electrode of a spark plug?

Since the voltage required to bridge the gap between the central electrode and the ground electrode of a spark plug can reach up to 40 000V and even more, my question is, how does the battery not die ...
0answers
20 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.
0answers
18 views

### P-N junction depletion region

Before I explain my problem I'd like to mention I'm still green and about 2 weeks into these topics. I learned most of it from youtube videos, wikipedia and other science sites, so I'll be explaining ...

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