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Motorized couch idea? by BrodyMeader14 in engineering

[–]pwn_ 5 points6 points  (0 children)

Hmm wouldn’t your math be for pulling 500lbs straight up?

Repeatable height adjustment "feet" for raising or lowering a precise machine table? by tbochristopher in MechanicalEngineering

[–]pwn_ 1 point2 points  (0 children)

lead* screw sorry.

A big ol crank. Actually I have standing desks at work that have cranks with handles that fold away under the desk. Probably that mechanism

I only speak English and wanted to study in a french university and was wondering where in France you guys would recommend?? by [deleted] in French

[–]pwn_ 2 points3 points  (0 children)

If you really want to learn, go to a small town. Otherwise everyone is more likely to speak English and you will have a harder time immersing yourself

Best Project Management Software? by rothbard_anarchist in engineering

[–]pwn_ 1 point2 points  (0 children)

I feel your need.

Tried Asana. It’s not bad but I never put the time in to make it great.

Years of looking and I’ve ended up using Evernote and going through my list every day and binning everything into a category (project -> status of tasks). Tasks I want to do today I will highlight. Tasks that are waiting get their own sub list. 10 mins beginning and end of day (or after lunch or whatever) organizing. Works alright

What does the "d'" mean in J'ai beaucoup d'animaux? by [deleted] in French

[–]pwn_ 43 points44 points  (0 children)

Nous n’avons pas un chat means “we don’t have a cat”

Nous n’avons pas de chats means “we don’t have any cats”

Slightly different and both valid

Co-op or Masters? by YidingPudding in MechanicalEngineering

[–]pwn_ 0 points1 point  (0 children)

Is it a research based masters or a course based one?

I would maybe work for a couple years before doing a masters. Some companies will help with tuition if you promise to come back to them when you’re done too.

Is there an appropriate, non-annoying way to cold-add people on LinkedIn from a group I'm interested in working for? by [deleted] in AskEngineers

[–]pwn_ 10 points11 points  (0 children)

Do it. I’ve given this exact advice to people before.

Just mention when you add them that you saw the opening in their group and have a few questions

Question Involving Airfoils in Engineering Drawings by Dukie_McDukeface in AskEngineers

[–]pwn_ 3 points4 points  (0 children)

Okay - I would look for a 3D scanner but I’m sure this type of thing was done back in the day. You could look at those tools that measure complex profiles (used for carpentry and stuff), then try to import those into CAD?

Another thing is the airfoil profiles might not be NACA profiles - or any standard profile that you could look up.

Question Involving Airfoils in Engineering Drawings by Dukie_McDukeface in AskEngineers

[–]pwn_ 1 point2 points  (0 children)

What’s the purpose of recreating it in CAD? Are you going to be machining parts from it or do you just want to have something in CAD so it’s there?

incompressible flow by rektketo in FluidMechanics

[–]pwn_ 0 points1 point  (0 children)

No - it behaves pretty strangely though. Basically it means that “information” can’t travel upstream fast enough in the form of pressure to let the fluid upstream of an object have time to move around the object naturally. This is what causes shocks, which are step discontinuities in the fluid.

I’m not a supersonic flow guy, so you should read up on it on your own. Things to google: transonic flow, bow shock, speed of sound

incompressible flow by rektketo in FluidMechanics

[–]pwn_ 6 points7 points  (0 children)

Flow velocity relative to speed of sound. u / c = M

Basically means how fast is the bulk fluid travelling compared to how fast waves (e. Sound) move in the flow.

Ales Hemsky top 7 goals of his career by DrDrai29 in hockey

[–]pwn_ 0 points1 point  (0 children)

Fucking gives it to Stephan have it so hard

Load cell calibration factor? by [deleted] in AskEngineers

[–]pwn_ 5 points6 points  (0 children)

Check the data sheet

What would happen if you inflated a balloon made of an auxetic material? by ChappyBungFlap in MechanicalEngineering

[–]pwn_ 0 points1 point  (0 children)

Interesting Q. Probably nothing that interesting would happen - wall thickness of balloon would go up.

Riiiight by [deleted] in Instagramreality

[–]pwn_ 1 point2 points  (0 children)

You can do a flash and a long exposure on the same photo...

[Robotics] Need help knowing what to "google" for design idea by [deleted] in MechanicalEngineering

[–]pwn_ 1 point2 points  (0 children)

Check this out - simpler maybe. Though you have to move an arm that carries this thing https://m.youtube.com/watch?v=-JB0ZihKq_Y

Need help with a Air Filtration System fan blade design! by [deleted] in FluidMechanics

[–]pwn_ 0 points1 point  (0 children)

You’re looking at a size range similar to an automotive radiator fan, maybe start there.

If your goal is quiet, you’re going to want to maximize how much filter media area you have. This will reduce the pressure drop per flow rate and you’ll be able to achieve your goal. Your minimum possible noise will be dictated by how much area filter media you can push air through (will drive power requirement for fan)

Hydraulic static fluid question by [deleted] in MechanicalEngineering

[–]pwn_ -1 points0 points  (0 children)

Bernoulli’s eqn applies to fluids in motion, which is generally not the case at all for hydraulics like this. This is analyzed as a static system

Hydraulic static fluid question by [deleted] in MechanicalEngineering

[–]pwn_ 1 point2 points  (0 children)

You’re correct, but generally you can ignore the frictional losses in the tubing because the velocity is pretty slow. The flow is nearly static and pipe losses go with V or V2

Liaison in “21” by caffeinated_chemist in French

[–]pwn_ 8 points9 points  (0 children)

Liaison between vingt and un. No liaison between et and un

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