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i/Engineering

Shubham_mishra

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6 days

Could this help fight brush fires?

Could this help fight brush fires?

1

2 replies

Malagupta1918

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7 days

Weekly Career Discussion Thread (13 Jan 2025)

\# Intro &#x200B; Welcome to the weekly career discussion thread, where you can talk about all career & professional topics. Topics may include: &#x200B; \* Professional career guidance & questions; e.g. job hunting advice, job offers comparisons, how to network &#x200B; \* Educational guidance & questions; e.g. what engineering discipline to major in, which university is good, &#x200B; \* Feedback on your résumé, CV, cover letter, etc. &#x200B; \* The job market, compensation, relocation, and other topics on the economics of engineering. &#x200B; \> \[Archive of past threads](https://www.reddit.com/r/engineering/search?q=flair%3A%22weekly+discussion%22&restrict_sr=on&sort=new&t=all) &#x200B;...

5

0 replies

Vratesh62

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7 days

Google AI responses appear to be degrading

4

8 replies

Shubh05

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7 days

Converting roman concrete formula for cold weather environment

I never use reddit, however a clients request has me stumped. They are planning a project to build a home using middle-eastern / roman building practices and techniques in USA climate zone 3-4. The plans for this are relatively sound albeit a bit strange for the region they have picked (namely a large courtyard) but have made significant efforts to accommodate for this. Their budget is essentially unlimited. One particular request that they have been an immovable object on is the composition or formula for the concrete used to...

3

0 replies

Abhilasha

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7 days

L.J. Hart-Smith, composite bonding expert, has passed away

L.J. Hart-Smith, composite bonding expert, has passed away

1

2 replies

Shubh05

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7 days

Fuck, marry, kill: cast iron, HDPE and titanium

Fuck, marry, kill is a type of question like "would you rather", except you have to choose what would do "fuck" (maybe do some side projects with, or some really cool shit), what would you "marry" (use for the rest of your life etc), and what would you "kill" (never use ever again)

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5 replies

tanishasahu0911

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8 days

Resources on the Magic of Engineering

Hey all, I'm looking for resources (books, YT channels, twitter accounts) that teach the magic of engineering. I don't have a specify area of interest atm. Thank you!

1

0 replies

Abhilasha

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8 days

What are the strongest and weakest points of this bridge?

4

0 replies

Abhilasha

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8 days

What are the practical limits (size and distance) on launching a giant balloon?

Totally serious here. I would say the requirements are 100-meter accuracy with 10-meter accuracy preferred. It needs to act like a water balloon, which means that it "explodes" on impact, releasing the water. Ideally it would be good to send it 10 kms, but let's say if it's not at least 1km it's probably not worth doing. Bigger is better, the equivalent of a helicopter water drop is the target I would pick. What are the challenges? Needs to be a material that will contain the water and not...

5

0 replies

Daddy

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9 days

Hoop Stress and ultimate failure

I have a question. I have a cylinder with semispherical heads. Size is 140mm diameter, 350mm overall length, 210mm between the head seams. The vessel is a strap-restrained elastomeric bladder. Circumferential straps are of high strength webbing (UHMWPE/Dyneema), webbing width is 30mm wide x 1mm thick, spaced in contact side to side. Properties of Dyneema: Tensile Strength, Ultimate, 3500 MPa, 508000 psi ; (I de-rate that by 25% to 2,625 because the strands in webbing aren't parallel to the load). Modulus of Elasticity, 110 GPa, 16000 ksi ; Tenacity, 3.53 N/tex,...

4

0 replies

Vratesh62

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9 days

I want to resolve your problems!

Hey engineers! I am not an engineer, but it is a pathway I am very interested in. I love CAD design specifically. Enough about me though, I wanted to know if any of you all had any engineering “problems” you’ve had to solve. I want some real world situations that I can practice coming up with cad designs or modeling already thought out ones. Thank you all!

4

0 replies

jhasneha29novm

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11 days

r/engineering's Monthly Jan 2025 Hiring Thread for Engineering Professionals

\# Overview If you have open positions at your company for engineering professionals (including technologists, fabricators, and technicians) and would like to hire from the r/engineering user base, please leave a comment detailing any open job listings at your company. &#x200B; &#x200B; We also encourage you to post internship positions as well. Many of our readers are currently in school or are just finishing their education. &#x200B; \*\*Please don't post duplicate comments.\*\* This thread uses Contest Mode, which means all comments are forced to randomly sort with scores hidden....

2

0 replies

jhasneha29novm

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11 days

Looking for light recommendations for syringe inspection

Operators 100% inspect clear syringes filled with a water-like fluid. They use a white/black background with a 2000 lumen black light. We ran a gage RxR and roughly half the operators failed, the other half got 100% accuracy.

2

2 replies

Sakshu_006

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12 days

Cast steel porosity and density

I'm repurposing some large 10,000lb cast steel weights for a project. They were in a deadweight transducer calibration frame, so I know they were 10,000lb (at the original location's gravity). They're very old, 1960's ish. Considering the parts' dimensions, I'm getting 0.26 lbf/in^3 (7.19 g/cm3). The porosity of this weight would be 8%. Is that something you would expect, or am I missing something? I have a little aluminum casting knowledge, but none with steel. Modern aluminum casting for industry uses lots of technology to keep porosity to ~1%....

1

2 replies

Sainsamridh_01

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12 days

Prompt Engineering

Really? This is a thing now? FFS

3

4 replies

Abhishat15

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13 days

Help: Low Outgassing epoxy to seal between metal and PCB for vacuum sealing?

I'm looking to seal between an aluminum flange and a PCB assembly that will pass thru the flange. This will act as a vacuum sealing barrier, and hopefully operate just fine down to 10\^-7 mBar. Of importance for is low outgassing of the epoxy after curing (think NASA low outgassing, ASTM E595). Does anyone have any recommendations?

3

6 replies

madhu

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14 days

Weekly Career Discussion Thread (06 Jan 2025)

\# Intro &#x200B; Welcome to the weekly career discussion thread, where you can talk about all career & professional topics. Topics may include: &#x200B; \* Professional career guidance & questions; e.g. job hunting advice, job offers comparisons, how to network &#x200B; \* Educational guidance & questions; e.g. what engineering discipline to major in, which university is good, &#x200B; \* Feedback on your résumé, CV, cover letter, etc. &#x200B; \* The job market, compensation, relocation, and other topics on the economics of engineering. &#x200B; \> \[Archive of past threads](https://www.reddit.com/r/engineering/search?q=flair%3A%22weekly+discussion%22&restrict_sr=on&sort=new&t=all) &#x200B;...

2

6 replies

Sakshu_006

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16 days

Measured force through rubber hole

**Hi everyone**, I am trying to calculate the force required to push a stainless steel cuboid through a hole in another cuboid of neoprene rubber and can't seem to find a good formula to calculate it with. The data is as follows: It is a stainless steel cuboid of **0.04"** (1mm) by **0.04"** (1mm) by **0.32"** (8.25mm) deep, the hole cut in the rubber is **0.023"** (0.6mm) by **0.023"** (0.6mm) by **0.32"** (8.25mm) deep, it is a rubber cuboid of **0.197"** (5mm) by **0.197"** (5mm) by **0.32"** (8.25mm). The...

2

11 replies

Abhishat15

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16 days

Does anyone happen to have a coupon code before I go ahead with this?

[This Workstation is way too expensive. Anyone happen to have a coupon code that works? ](https://preview.redd.it/3a7oc9509vae1.png?width=529&format=png&auto=webp&s=977799f61986a0c79bed168e1fac9675eb5639a9)

3

3 replies

Shubham_mishra

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16 days

What's a good free (or very cheap) calculator iOS app akin to the TI-36xpro?

What's a good free (or very cheap) calculator iOS app akin to the TI-36xpro?

4

3 replies

i/communityname

i/engineering

Could this help fight brush fires?

Weekly Career Discussion Thread (13 Jan 2025)

Google AI responses appear to be degrading

Converting roman concrete formula for cold weather environment

L.J. Hart-Smith, composite bonding expert, has passed away

Fuck, marry, kill: cast iron, HDPE and titanium

Resources on the Magic of Engineering

What are the strongest and weakest points of this bridge?

What are the practical limits (size and distance) on launching a giant balloon?

Hoop Stress and ultimate failure

I want to resolve your problems!

r/engineering's Monthly Jan 2025 Hiring Thread for Engineering Professionals

Looking for light recommendations for syringe inspection

Cast steel porosity and density

Prompt Engineering

Help: Low Outgassing epoxy to seal between metal and PCB for vacuum sealing?

Weekly Career Discussion Thread (06 Jan 2025)

Measured force through rubber hole

Does anyone happen to have a coupon code before I go ahead with this?

What's a good free (or very cheap) calculator iOS app akin to the TI-36xpro?

Test

What is the cut off percentile to get admission to IIM Bangalore in 2024?

What is the cut off percentile to get admission to IIM Bangalore in 2024?

Cuong test

Should I upgrade from Rails 7 to Rails 8 right now or wait?

Ruby on rails

Kareena to Saif's rescue

Saif ali khan's stabber arrested

What is the correct version of Hanumaan Chaalisa?

Iconic photos from the Mahakumbh Mela 2025. Har Har Mahadev