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i/Engineering

madhu

•

3 months

Woodworking screws in CAD

Hi guys In EU, so no imperial please. When you design structures that use e.g. a metal frame to which a wooden panel gets screwed. How do you manage the details like holes (countersunk, regular, slot, ...) and wood screws? Are there standards you use for manufacturing in Europe and China? With bolts it's easy and built-in (currently using SW) but with wood screws I'm a bit lost. Thanks for any help!

1

3 replies

shubham_mishra

•

3 months

Trying to identify this air flow tester

I have run across one of these before in my search for CFM airflow testing. I found one very much like it in France, but with a different number of rings. There is one currently on eBay which is identical aside from the gauge. Does anyone have any information on this or a set of instructions? https://preview.redd.it/bsfyw398z0de1.jpg?width=3024&format=pjpg&auto=webp&s=b639ede1b2189ba2680a37ebfc827163c31816ba [Airablo link](https://www.airablo.com/products/testeur-a-vacuum-airablo-271-cfm?shpxid=e416b32f-e74f-4553-94c8-44cccd647974) [eBay link](https://www.ebay.com/itm/115266389516?_trkparms=amclksrc%3DITM%26aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D279071%26meid%3D1c264673540649848d5882c2ac4a8dcb%26pid%3D101952%26rk%3D1%26rkt%3D1%26mehot%3Dnone%26itm%3D115266389516%26pmt%3D0%26noa%3D1%26pg%3D4375194%26algv%3DWatchlistVariantWithMLR_BP&_trksid=p4375194.c101952.m162921&_trkparms=parentrq%3A66a7ff2e1940a8dde3e3b329ffffcf8e%7Cpageci%3A15eec9ac-d2bc-11ef-bd3f-ce8f59f0065d%7Ciid%3A1%7Cvlpname%3Avlp_homepage)

3

0 replies

karan.batman

•

3 months

Here’s an engineering problem for you..

I’ll provide below a short description of the problem with given circumstances and you come up with a solution you believe to be most cost effective and practical. A 40’ shipping container needs to be moved approximately 20’ transversely to its length. DL is 10kips (contents included) and currently sits atop 3 railroad ties. Conditions: The container is in a pasture full of grass with surface conditions slick enough to get a 3/4 ton pickup truck stuck (2WD). Railrod ties are $20 ea. It would cost $450 to have...

1

16 replies

daddy

•

3 months

Sources

Hello everyone, I wanted to ask if anyone could recommend any good sources or materials for studying engineering mathematics. I’m looking for something that explains the concepts clearly and provides useful practice problems.

4

7 replies

shubham_mishra

•

3 months

Could this help fight brush fires?

Could this help fight brush fires?

1

2 replies

malagupta1918

•

3 months

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

•

3 months

Google AI responses appear to be degrading

4

8 replies

shubh05

•

3 months

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

•

3 months

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

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

1

2 replies

shubh05

•

3 months

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)

1

5 replies

tanishasahu0911

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3 months

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

•

3 months

What are the strongest and weakest points of this bridge?

4

0 replies

abhilasha

•

3 months

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

•

3 months

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

•

3 months

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

•

3 months

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

•

3 months

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

•

3 months

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

•

3 months

Prompt Engineering

Really? This is a thing now? FFS

3

4 replies

abhishat15

•

3 months

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

i/communityname

i/engineering

Woodworking screws in CAD

Trying to identify this air flow tester

Here’s an engineering problem for you..

Sources

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?