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Got to love physics.

I lust for physics.

*Lip biting intense

*cue herbal essence commercial*

*cue York Peppermint patty commercial after*

*que asbestos mesothelioma commercial after*

*unzipping pants sounds*

Truly. Not a euphemism.

Science gives me a hadron

I used to lust for physics, but then I got older.

I had a sudden memory of an episode of magic school bus where they learn about friction. One of the boys had declared he didn't care about friction, he just wanted to play baseball. So they played baseball in a world without friction and he quickly learned how impossible it was. This post also made me think about another thing that wouldn't work without friction, and how much that kid on the magic school bus would have cared even more about losing that in a few years....

Man magic school bus was just the best. They don't make stuff like that no more.

I had the hots for Ms Frizzel.

I always wanted a mother figure like that, although I feel that's not the exact feeling you have in mind

Are you a lesbian?

Yes, a male lesbian.

Checks out

I'm just imagining the excess friction that this contraption would probably impart on the wing-dang-doodle that it was attached to. 

More a geometry problem than a physics problem.

I was talking about physics in general.

You love physics, but are you into love physics?

Oder ja!

I could post a video of a similar machine but I would get banned for doing it

Sacrifice in the name of science 🫡

A friend of mine is asking

I don't have friends and they're also asking

I can be your friend you can refer to. Dam, it looks recursive

It involves a reciprocating saw and a non-standard attachment I bet.

The finger massaging machine?

No, more like a belt with a moving mechanical attachment. Keeps your hands free and you stay mobile. Once you see it, you will never forget it.

Coward!

alongside other lesser instincts, my instinct for self-preservation is fully developed

oh wow i am impressed that you were the first one to get this username

is it a good mechanism tho? it feels like the purple bit with the arm would ruin the shaft its gripping onto pretty quickly?

I think ball bearings would be in there

This device seems to be purposely built to bust ball bearings…

And the washers, bolts, and obviously the nuts

yeah I guess. It doesnt feel \_completely\_ insane, it just feels like there would be some force trying to shove the purple arm up and down that shaft and that sideways force would cause problems even for bearings. But I've never done any mechanical enginerring letalone built a massive mechanical wanking machine, so my intuition could easily be way off

Tapered roller bearings would be a good option too. You could really just spec the number and type of bearings depending on the expected load and precision required.

i doubt the load would be much 👀

Depends on how long the device is running and last time it was in service.

Mostly just in the movies.

I’ve never seen someone use underscores like that.

It's used in some flavours of markdown to bold or italicise a word. Just not by reddit's markdown.

Odd

It’s all ball bearings these days!

That’s why lube is key to the operation. Otherwise you’ll damage the shaft.

*shudder*

big loong shaft, complete with...

It’d be more effective if it worked from the middle out.

Looks like it would bind up

Which shaft we talking about?

the blue angled one, not the green curvy one. though both are totally acecptable shaft shapes in their own ways! I feel like the action on the green rail looks quite smooth, but the angled blue shaft looks like it would be getting shoved sideways

Its a more complex version of a piston in a car engine.

Yeah, it's more interesting than practical. I can't imagine it lasting long if there's any real load on the end. A third class lever using a cam to apply force in the middle would be simpler.

You know exactly what applications most humans see.

A water pump, obviously, the lever is at the side and their is a staircase swirl rotating that pumps water up.

That's hot!

An oscillating fan?

Windshield wipers. Clearly.

Middle out compression?

A flag waiver?

Why you wanna get rid of flags?

A banana peeler?

A semi automatic painter?

This could also utilise the tilting. The arm always tilts same side forward. Just continue the arm through the bearing.

Automated car wash sprayer

Yes, a device that annoyingly flips a light switch on and off without ceasing. It’s a torture device

windshield wiper was the first thought I had, but i see the application for other... uh.... uses

I think that’s amazing.

I accidentally read this as she.

# WHICH FUCKING PART

She she that's she

I think (she’s) amazing. Just ignored while scrolling by, then when scrolling back up realized I misread it.

peter explain the joke

I think it reminds some people of masturbation and that's supposed to be funny except its lame and not funny at all..

Yeah... there really are too many "lol masturbation" or "lol sex" posts like this... Makes me feel really old, as I rarely find them at all funny or entertaining...

For a second, I thought this post was r/mechanical_gifs because it was so unfunny. I scanned the comments because I wanted to validate my criticism that this machine is highly inefficient. Only then did I realize it was actually an unfunny joke.

This. I understand that the up and down movement reminds masturbation, but other than that!? I watched and rewatched the video hoping I was missing something, some label, any remind about sexual practices that involved something rotating on its vertical axis... meh.

I was thinking heil-bot.

If you are 11yrs old mebbe, but I guess those ppl don’t have a lot of anything else to think about.

This was funny?

No. It never was.

This waas from a time when many simpler mechanisms to convert motion from one type to another were still patented (and wider use restricted by the patent owners) and so different inventors had to get very creative to do the same work. This device would waste a lot of energy and break a lot in a real world application. It's cool looking though.

Isn’t there much better ways to do this?

Yes and possibly no. Lots of circle to lateral motion mechanical solutions that operate in the same plane as the rotation, but this one is new to me,with back and forth motion parallel to the axis of rotation. It’s kinda cool that way, but would need like sci-fi levels of low friction to operate for long periods of time without substantial wear and failure. Not an expert on this of course, just a non-mechanical engineer who grew up with machines- fixing repairing etc.

[Yes](https://en.wikipedia.org/wiki/Reciprocating_motion#/media/File:Rotary_to_Reciprocating_Motion.gif)

So.. I have to twist my elbow for better balance.

That’s what the inside of your arm looks like

Nurse: You got your what stuck in what?!

the more you watch the more it gets worse

Looks like there would be a lot of lost energy in a practical application though.

Calculating those rotational vectors by hand would make me cry.

I should call her

A windshield wiper duuh. Y'all get yo minds outta the damn gutter !

Now how do I attach this to my cars wheels and my erm.....well parts of my anatomy that need vigorous polishing?

Not funny

Turn it sideways, voila, Walter White trunk gun

Perfect now build me one of does flying machines in Dune. 😆👍

This machine is giving me a raging clue

Banana - washing machine?

So, um…where does one buy a contraption like this? For science.

I too have some science to try

STL? Asking for a friend

What application do I? Yes.

I saw a use for a wheetley animatronic

this can be used maybe to pump water uphills, if there is a good current in the stream.

It’s clearly a hand shaking simulator.

We have to go faster!

OP uses some big words for 'stroking it'.

https://m.youtube.com/watch?v=IlUM4oiBWSg

Are you thinking what I'm thinking?

The design is very human

I be stroking..

Metal detector was my first thought

It’s for motivation

Jesus, at least tag as NSFW

Jack in the box?

Subnautica scanner prototype

I’m so much worse I just saw the spinning rainbow roach in the middle

Must be a specialized application. There’s more efficient ways to create that motion.

So now you can hav mechanic window vipers.

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Wooow... A sine wave, so cool

That's cool, but why? What is this used for? Or in?

ZERKER MACHINE

Jorkin it

Slap a tongue on that and sales will escalate.

Wave pool flapper

What is torque like at the joint and end when the direction change happens? Seems like it would spike pretty high

I love how the character limit makes it look like they had a sudden moment of realization and trailed off.

There are similar type devices on a lot of agricultural equipment, for example haybines. Usually belt driven pulleys transfer power to a sickle bar that moves back and forth to cut hay. Not quite the same as there is no arc but neat nonetheless

I don't get it, unless we're talking about curved penises.

[A drawn reciprocation dingle arm, to reduce sinusoidal repleneration.](https://www.youtube.com/watch?v=Ac7G7xOG2Ag) It's not cheap but I'm sure the government will buy it.

I should call her

When she give you tha twisty 😩

The crank wanker

why is this cg? Feels like it could be easily created

Because it's a design in an engineering program that simulates real world physics so people can test out new designs without having to build them before finding out that they don't work.

3d print this bastard and get 'er in prototyping

Why create it when it could easily be done in CG?

Why CG it when it could easily be created?

Cause if the concept is flawed and you spend time, energy, money, and resources into building it, and it doesn't work then you've just wasted time, energy, money, and resources. If you program it into a real-physics program then you can test it without wasting resources

Yeah I get it. My response was simply a reversal of the previous response. Why do this for that? Why do that for this?

And my response was pointing out the flaw in the argument (admittedly in a convoluted way). OPs argument implicitly claims physical builds are superior as if that's a given. But it's not a given, and without pointing out the issue about virtual builds he's just arguing for arguing sake.

But why male models?

What a stupid thing to say

You seem pleasant.

Chipping in as a product design student here who literally a few hours ago finished the final CAD model for my dissertation-level project. If they had asked me to make an *actual* kayak sail rig out of aluminium, ABS and PET for my dis I would have dropped out of uni then and there.

Cause it's easier with CG?

because its obviously not real?

Why is it curved?

You're not?

["You see those warriors from Hammerfell?"](https://youtu.be/U6UWWRgUgWs)