I was recently made aware that AIAA provides publication services of technical textbooks for specialized fields within aerospace. Unlike a conference paper, this service allows for multiple authors that are Subject Matter Experts (SMEs) to come together and develop technical guidance on complex and niche engineering topics.

I’ve published papers with them before, but never textbooks.

Has anyone here published textbooks with AIAA before?

I have a cooler with 148 , 1inch gauge 14 tubes. Its 10 ft long.

It has 2 headers 5.5in x 6in x 10ft long.

Is there a simple way to check how much bottles of 2200psi nitrogen botles i would need to leak test it?

I dont know if there is a clever way to calc the volume but i did it the long route.

But im still unsure how the N2 would compress the air.

Im also concerned about wasting n2 by having the bank just leveling out at a low pressure. Idk if that is a valid concern tho.

Hello everyone,

I’d like to reach out to this community for help with a challenge I’m facing. As an amputee with only my right arm, I’ve adapted my computer usage by relying on the Azeron Cyro, a device specifically designed for one-handed gaming. It’s been incredibly useful in allowing me to stay active on my PC.

For those unfamiliar with it, the Azeron Cyro is a joystick-keypad hybrid that uses mostly 3D-printed components with some aluminum parts.

While the Cyro works well for my needs, I’ve noticed a significant limitation: its fragility. Due to its primarily 3D-printed construction, it’s prone to wear and tear with heavy daily use. Replacements and repairs can get expensive, which makes this a growing issue for me.

I’m reaching out to ask if anyone here has experience in:

• Strengthening the design of the Azeron Cyro, such as by creating a more durable frame using stronger materials.
• Exploring alternative devices that could offer similar functionality but with better durability.

If you’re skilled in 3D modeling, hardware design, or just have ideas or suggestions, I’d love to hear from you. Your input could greatly improve not only my experience but also help others in similar situations.

Thank you in advance for your advice and support!

Best regards,
Josh

Hi,

I am trying to learn more about pneumatics/fluid dynamics to be able to make relatively accurate 'back of the envelope' calculations. For statics roarks formulas for stress and strain are very nice but I have not found an equivalent for pneumatics/fluid dynamics yet. Do any of you have any recommendations?

Thanks

I have personally used Protolabs for machining with good results. Looking for suppliers of the following services:

-machining -sheet metal -weldments -coatings

Part sizes ranging from 10 cm (4in) up to 2 meters (~80in). Quantitites 5-10 pieces. Quoting should take <5 days and items delivered in 4 weeks or less. Paying a premium for expedited work is less of a concern compared to the cost of delayed development. Thanks in advance!

Look for an alternative material to use as a guide for solar farm pile installation. Current OEM material is a softer plastic that wears very fast and isn’t very cost efficient. I am able to custom cut any material just not sure what would wear the least to make it more efficient.

Hi All, I'm co-founder of Levels.fyi. Over the last few weeks I've been gathering feedback in the subreddits for each discipline (ex. r/MechanicalEngineering, r/ElectricalEngineering, etc.) on how to add each to Levels.fyi. For background, we're a Salary sharing site that's popular in the tech industry and software roles. There were dozens of comments and I had live conversations with some of you as well on how to structure the title taxonomy - thank you all! Happy to share that we've finally launched Levels.fyi for the Real* Engineers.

*As a Software Eng by background this is sorta a running joke amongst my friends in other engineering disciplines. Software sometimes isn't seen as real engineering :P

Along with their sub-disciplines I recently added pages for Mechanical, Civil, Hardware, Aerospace, Geological, Chemical, Optical, Controls and MEP Engineers. Search the full list of titles here.

I hope we can bring more pay transparency and raise the tide for all fields as we've done for Software. Please consider adding your salary and sharing the pages with colleagues and friends. Thank you all again for all the feedback and helping make this happen!

I was looking around for a tutorial on designing a furnace exhaust stack for wind/seismic/etc. and really not finding much useful online. There are a ton of software options to buy, and we used to use STAAD pro, but what I'm wanting to do is go through the hand calculations so I understand it better. I'm coming at this as a chemical engineer/process engineer who has to work with the mechanical/structural guys.

Is there anything useful out there as a reference? I'm tempted to just sit and read STS-1 over and over but after one pass through it doesn't appear to really give me what I need, it's more a reference regulating you once you already know what you're doing.

I am building a hopper for 6mm square nuts. I need to them to come out the bottom of the hopper oriented vertically. The size of the square nuts is 10mm x 10mm x 4.6mm.

My main question does anybody what angles are best on the sides of the hopper to be in order to reduce them from stacking up and "clogging" near the bottom. My best guess is steep but wanted to know if anybody had experience.

# Intro

​

Welcome to the weekly career discussion thread, where you can talk about all career & professional topics. Topics may include:

​

* Professional career guidance & questions; e.g. job hunting advice, job offers comparisons, how to network

​

* Educational guidance & questions; e.g. what engineering discipline to major in, which university is good,

​

* Feedback on your résumé, CV, cover letter, etc.

​

* The job market, compensation, relocation, and other topics on the economics of engineering.

​

> [Archive of past threads](https://www.reddit.com/r/engineering/search?q=flair%3A%22weekly+discussion%22&restrict_sr=on&sort=new&t=all)

​

---

​

## Guidelines

​

1. **Before asking any questions, consult [the AskEngineers wiki.](https://new.reddit.com/r/askengineers/wiki/faq)** There are detailed answers to common questions on:

* Job compensation

* Cost of Living adjustments

* Advice for how to decide on an engineering major

* How to choose which university to attend

​

1. Most subreddit rules still apply and will be enforced, especially R7 and R9 (with the obvious exceptions of R1 and R3)

​

1. Job POSTINGS must go into the latest [**Monthly Hiring Thread.**]((https://www.reddit.com/r/engineering/search?q=flair%3A%22hiring+thread%22&restrict_sr=on&sort=new&t=all)) Any that are posted here will be removed, and you'll be kindly redirected to the hiring thread.

​

1. **Do not request interviews in this thread!** If you need to interview an engineer for your school assignment, use the list in the sidebar.

​

## Resources

​

* [The AskEngineers wiki](https://new.reddit.com/r/askengineers/wiki/faq)

​

* [The AskEngineers Quarterly Salary Survey](https://www.reddit.com/r/AskEngineers/search/?q=flair%3A%22salary+survey%22&include_over_18=on&restrict_sr=on&t=all&sort=new)

​

* **For students:** [*"What's your average day like as an engineer?"*](https://www.reddit.com/r/AskEngineers/wiki/faq#wiki_what.27s_your_average_day_like_as_an_engineer.3F) We recommend that you spend an hour or so reading about what engineers actually do at work. This will help you make a more informed decision on which major to choose, or at least give you enough info to ask follow-up questions here.

​

* For those of you interested in a career in software development / Computer Science, go to r/cscareerquestions.

I need to design a production line for soda cans and the last step is to put two 3x2 packs of cans, that are wrapped in plastic, on a cardboard tray thats already folded. The 2x3 packs come from a conveyor belt with the short side (2cans) parallel to the direction of travel. About a packet every 12 seconds.

The trays can be supplied in any way (not manually), but preferably on a conveyor belt as well. The trays are made for 3*4 cans (so 2 packs of 2*3) and are about 5 cm tall (2 inch).

My idea was to grab it from both sides with pneumatic cilinders and then move those over and down with other cilinders, but that would require double cilinders for the over movement since there's 2 different positions (front and back of tray) and it doesn't feel elegant or simple. I was hoping anyone could find an elegant solution for the problem.

thanks in advance

https://preview.redd.it/hbwm3dfnc87e1.png?width=642&format=png&auto=webp&s=d7be1b3f7c32947cc7c3c8549d0cb4f5ce151a16

Hi everyone. I have a project for which I have not found an elegant solution, and I would like to ask for your advice in the following situation. I want to install a decorative wood panel all the way up the wall from the baseboard to the ceiling. I can't screw it on the front directly, but it is about 1 cm thick, which allows me to install some fasteners on the back side. There is some space (1-1,5 cm) between the panel and the wall, so just gluing it down will not work. The construction must be stable, I tentatively estimate its weight at 20 kg. The wall is made of concrete. I would be very grateful for your ideas. Thank you for reading!

How much psi would I need to hydroform polycarbonate?

Was just looking at a video where someone put 18 gauge steel sheet between a flange and plate about 1" thick and pressurized it with water to create a dome shape from the 18 gauge steel.

I'm looking to do the same but with polycarbonate. It looked like the 18 gauge steel formed at around 350 psi.

What psi do you think it would take to do the same with 1/8 , 1/4" and 1/2" polycarbonate? Approximately

Thanks

I'm looking to put together a setback bracket for an outboard motor.

I need 16-18" of total set back. The motor weighs about 480lbs

My current plan is to use 12"×4"×1/2" aluminum C channel as an offset bracket and then mount a 6" or 8" hydraulic jackplate to that.

My question is 6061 or 5083 alloy.

Or, does anyone have a better idea.

Thanks!

I've already posted this in r/ plumbing, I'm an engineer, and this appears to be an engineering problem.

Strange problem for my landlords. The original water heater that came with their house would supply hot water to the shower/tubs (showers are on the walls above the bathtubs - standard) in all three bathrooms in the house. They replaced the water heater. Now, the bathtubs get hot water, but when switched to shower, the showers start hot but within ten seconds become cool. Every shower in the house has the same problem. The landlords replaced the water heater again, but the same problem exists. And here's the kicker - a neighbor across the street with a similarly built house came to have the same problem with the showers.

What do you folks think? To me, it says that a water heater with unknown water flow characteristics is needed in order for the showers to be able to produce hot showers.

Do you think this design can be adopted massivement by big constructors around the world or it will stay niche ? It seems to be promising but i can't tell by myself.

# Intro

​

Welcome to the weekly career discussion thread, where you can talk about all career & professional topics. Topics may include:

​

* Professional career guidance & questions; e.g. job hunting advice, job offers comparisons, how to network

​

* Educational guidance & questions; e.g. what engineering discipline to major in, which university is good,

​

* Feedback on your résumé, CV, cover letter, etc.

​

* The job market, compensation, relocation, and other topics on the economics of engineering.

​

> [Archive of past threads](https://www.reddit.com/r/engineering/search?q=flair%3A%22weekly+discussion%22&restrict_sr=on&sort=new&t=all)

​

---

​

## Guidelines

​

1. **Before asking any questions, consult [the AskEngineers wiki.](https://new.reddit.com/r/askengineers/wiki/faq)** There are detailed answers to common questions on:

* Job compensation

* Cost of Living adjustments

* Advice for how to decide on an engineering major

* How to choose which university to attend

​

1. Most subreddit rules still apply and will be enforced, especially R7 and R9 (with the obvious exceptions of R1 and R3)

​

1. Job POSTINGS must go into the latest [**Monthly Hiring Thread.**]((https://www.reddit.com/r/engineering/search?q=flair%3A%22hiring+thread%22&restrict_sr=on&sort=new&t=all)) Any that are posted here will be removed, and you'll be kindly redirected to the hiring thread.

​

1. **Do not request interviews in this thread!** If you need to interview an engineer for your school assignment, use the list in the sidebar.

​

## Resources

​

* [The AskEngineers wiki](https://new.reddit.com/r/askengineers/wiki/faq)

​

* [The AskEngineers Quarterly Salary Survey](https://www.reddit.com/r/AskEngineers/search/?q=flair%3A%22salary+survey%22&include_over_18=on&restrict_sr=on&t=all&sort=new)

​

* **For students:** [*"What's your average day like as an engineer?"*](https://www.reddit.com/r/AskEngineers/wiki/faq#wiki_what.27s_your_average_day_like_as_an_engineer.3F) We recommend that you spend an hour or so reading about what engineers actually do at work. This will help you make a more informed decision on which major to choose, or at least give you enough info to ask follow-up questions here.

​

* For those of you interested in a career in software development / Computer Science, go to r/cscareerquestions.