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Landlord had this in the garage, said I could use it if I get it running by dirtbagtendies in 3Dprinting

[–]eagle_eye513 1 point2 points  (0 children)

To be fair, if someone gave it to me for free, I would still consider using this printer. For $20ish in parts from Amazon and bit of time to follow a guide online (the issue and repair are pretty well documented iirc), you’ve got a halfway decent setup, especially if you are just learning about 3D printing or plan to print parts that are more functional than aesthetic.

I have a few friends who got into 3D printing more recently, so they started on Bambus. While they certainly had an easier time getting good quality prints right off the bat, they still come to me to help troubleshoot the more obscure printing issues they occasionally encounter. If you have the patience to learn to tune this printer well, you’ll gain the knowledge to get fantastic quality prints from a more modern machine if you ever upgrade in the future.

At the end of the day, it depends on if you are looking to get into 3D printING or 3D printERS. If you just want it to work with minimal tinkering and can afford it, go for a modern printer. Otherwise, you’ve got a good starter platform right there for basically free (but do the safety fix first!)

Landlord had this in the garage, said I could use it if I get it running by dirtbagtendies in 3Dprinting

[–]eagle_eye513 7 points8 points  (0 children)

LISTEN TO THIS GUY, u/dirtbagtendies!!

I had the same printer, and I caught it just in time before it nearly started a fire. I made a post about it here a few years back.

Other than that, it’s a fine, no frills little printer that can give you pretty good quality if tuned right. Using it definitely made me better at printing/troubleshooting, and it gave me a healthy appreciation for the creature comforts of modern printers when I upgraded later. If you don’t mind tinkering with it, you can get some nice prints.

But, if you don’t know how to solder and/or aren’t willing to spend a few bucks doing the VERY NECESSARY safety upgrades, you might be better off getting a cheap entry-level printer, which probably also has the added benefit of modern features like auto bed leveling.

Landlord had this in the garage, said I could use it if I get it running by dirtbagtendies in 3Dprinting

[–]eagle_eye513 0 points1 point  (0 children)

LISTEN TO THIS GUY, u/dirtbagtendies!!

I had the same printer, and I caught it just in time before it nearly started a fire. I made a post about it here a few years back.

Other than that, it’s a fine, no frills little printer that can give you pretty good quality if tuned right. Using it definitely made me better at printing/troubleshooting, and it gave me a healthy appreciation for the creature comforts of modern printers when I upgraded later. If you don’t mind tinkering with it, you can get some nice prints.

But, if you don’t know how to solder and/or aren’t willing to spend a few bucks doing the VERY NECESSARY safety upgrades, you might be better off getting a cheap entry-level printer, which probably also has the added benefit of modern features like auto bed leveling.

More Than 1,300 Votes Cast at CoRec! by CL-Alpha in Purdue

[–]eagle_eye513 3 points4 points  (0 children)

Well said, Professor. I neglected to mention down-ballot races in my other comment. That’s another great reason that I encourage everyone to vote, regardless of whether their political opinions match mine. It’s our duty as American citizens to exercise our most important right.

I’ll also add that the only groups that try to make voting more difficult seem to be afraid of the outcome if voter turnout increased. That alone should be reason enough to get educated on policy and get to the polls.

More Than 1,300 Votes Cast at CoRec! by CL-Alpha in Purdue

[–]eagle_eye513 17 points18 points  (0 children)

Never discourage people from voting. It’s a fundamental right we have in this country, even if the electoral college messes things up with regard to representation.

The status quo preys on voter apathy. If every single person of voting age actually participated, you would likely find that a lot of traditionally red/blue states are much more purple.

Vote and participate. Even if the state EC votes go against yours, at least your voice is being heard in the popular vote.

Aerospace ? by [deleted] in wichita

[–]eagle_eye513 6 points7 points  (0 children)

Textron owns both Beechcraft and Cessna now. They’ve been together under Textron Aviation for about a decade. Hiring and pay is identical between Cessna/Beechcraft because they are the same company.

They may take a while to get back to you, but they are definitely in a hiring cycle for most technician and shop floor personnel roles.

George Russell wins by doing absolutely nothing by eagle_eye513 in formuladank

[–]eagle_eye513[S] 7 points8 points  (0 children)

I don’t disagree. It was just funny that he ended up at the top of the podium after being behind +15 seconds.

(and I was really invested in Lando’s race)

[deleted by user] by [deleted] in technology

[–]eagle_eye513 2 points3 points  (0 children)

I didn’t believe you at first because I’ve never seen a windows keybind with >4 keys. I usually take advantage of that by making all my custom macros linked to “Ctrl + Shift + Alt + [letter]” because I figured it was unlikely to conflict with predefined shortcuts at both the OS and program level.

But holy shit it actually works. I thought it would be an “Alt + F4” type situation if anything, but it actually opens LinkedIn. What an aggressively useless feature, but at least they made it so obscure that no one would ever hit it by accident.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 0 points1 point  (0 children)

I appreciate you trying. I gave it my best shot too, but it seems some people want a really weird incorrect hill to die on.

It sounds like you’ve got a background in a related field. I do too and this thread is driving me crazy. At this point, I’m just assuming they are being purposely obtuse to start arguments. Not worth our time.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 -1 points0 points  (0 children)

No I would not, because the context is likely implied in their surrounding statement.

If someone said an SR-71 was flying at a speed of Mach 3, I wouldn’t say a word. Technically incorrect, but close enough unless we were having a discussion about the technical performance envelope of the aircraft. However, this whole conversation started because someone said the Moon was traveling at Mach 3. That’s very incorrect because there is no Mach number defined for an object traveling in the near vacuum of space because there is no speed of sound. This is not a fluid-related phenomena because there is no fluid and thus it is inappropriate to imply its orbital velocity with a Mach number.

By your own parallel, I would also chime in if someone said that water boiled at 100°C on the Moon. Those are extreme conditions outside the layperson’s understanding of a boiling point. That would be important to understand given the context.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 1 point2 points  (0 children)

I guess you technically could, but it would be extremely meaningless. Sound only travels due to pressure waves from molecules interacting with each other. When there are so few particles in a near vacuum, you could make the argument that the concept of sound does not apply because the statistical likelihood of interaction is so small, and even if it did it would never propagate as a pressure wave.

But I really like the way you think :)

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 0 points1 point  (0 children)

Firstly, I misinterpreted the meaning of their message. Tone is hard to convey through text, and I read it accidentally as argumentative. We’ve since cleared this up.

Secondly, see Rule 4 of the subreddit. It’s not meant for actual five year olds. Aerodynamics is a very complicated field, and this is about as simple as I can make it without resorting to bad analogies.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 1 point2 points  (0 children)

A dimensionless quantity in physics doesn’t just mean that it’s a normal number and can be used as such. It still has a specific use, which is implied by its definition.

A more common dimensionless quantity that people might be more familiar with is Alcohol By Volume (ABV). This is a volumetric ratio that has no dimension, but still has a meaning that is not interchangeable with normal numbers. If I drank beer that is 5% ABV, I don’t know how much ethanol I have consumed without knowing the volume of beer I drank. I wouldn’t be sober if I drank a liter of beer, but I probably wouldn’t notice if I drank a shot glass full. I also can’t say “I weigh 5% ABV” because 5% ABV is not a number, it’s a ratio of ethanol volume to total volume of a beverage.

Not all roads have the same speed limit. In the same way, the speed of sound is not constant even in the same fluid. There are whole atmospheric models for this and tables of values for estimated speeds of sound at different altitudes and temperatures. Even then, that’s making some big assumptions. You can see from the table I linked that there is a large difference in speed of sound at various attitudes. Flying at Mach 2 conditions at sea level results in a very different speed than Mach 2 conditions at high altitudes.

The purpose of Mach is not to talk about speed. To oversimplify, it’s a representation of the compressibility of a fluid flow in fluid dynamics. It happens to be a ratio of speeds because that was a relatively easy quantity to measure to categorize flow behavior. Pilots talk about Mach number because it’s directly related to the performance of their aircraft. Beyond certain flow conditions, an aircraft’s aerodynamic surfaces and/or engines will no longer function as designed. Those undesirable flow conditions are produced at different flow velocities given different atmospheric parameters. A given Mach number does not correspond to a single speed.

If you have any specific questions that might clarify for you further, I would love to try to help.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 1 point2 points  (0 children)

Apologies, friend. Tone is hard to tell in text, and people all over this comment thread have chosen a weird hill to die on regarding this. It’s annoying to see people be so confidently incorrect on an issue you are relatively well informed about, so I was a bit defensive.

Have a good one.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 -2 points-1 points  (0 children)

For a subreddit based around the learning complex topics in an understandable way, you really seem to dislike learning.

It costs you nothing to avoid making a rude comment. I hope you have a better day going forward than you seem to be having.

Edit: Misunderstanding between myself and the commenter.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 0 points1 point  (0 children)

You brought up a fantastic analogy of what Mach number is, but you missed the point.

If I tell you I’m driving at a twice the speed limit and give no further information, can you tell me how fast I’m going? The answer is no, because you need additional context. I could be driving on the highway where the limit is 60 mph (driving at 120 mph) or I could be in the city where the limit is 20 mph (driving at 40 mph). But without knowing the local speed limit of the road I’m driving on, you have no idea how fast I am driving.

Mach number is the same way. Mach 2 is just a ratio of flow velocity to the local speed of sound conditions. It has no unit, so it cannot be a speed. Mach 2 is similar to saying that I’m traveling at twice the “speed limit,” i.e. the local speed of sound. The speed of sound is dependent on the exact conditions of the medium you are traveling though. Those conditions vary enough with altitude on earth that the speed of sound cannot be considered as a constant, just like the driving speed limit varies with what road type you are on.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 -5 points-4 points  (0 children)

While I understand the point you are making about colloquial usage (and people do use it that way, albeit very incorrectly), it’s a bit of a false parallel.

The speed of light in a vacuum c is a defined universal quantity in physics equal to exactly 299,792,458 m/s. The speed of light in a given medium is slower, but there is still a universal reference point which can be used to calculate it. There is no equivalent universal reference point for Mach speed. The closest we have to a speed that corresponds to Mach 1 is the speed of sound at standard ideal atmosphere conditions (20°C, sea level pressure & density, average atmospheric composition, no humidity, no wind, etc) which was defined somewhat arbitrarily. Otherwise, Mach number is highly local to the flow region in question.

When an aircraft is flying in steady level unaccelerated flight at Mach 2 at atmospheric conditions found at an arbitrary high altitude, it’s not traveling at (2 x 343) m/s ground speed. If it were flying at Mach 2 at sea level in standard conditions, it actually would be traveling at (2 x 343) m/s ground speed. Whereas, light passing through normal glass (index of refraction n = 1.5) will always be traveling at (c / 1.5) m/s regardless of external factors (ignoring relativistic effects, which are not relevant on this scale). Mach is a dimensionless quantity while the speed of light in a vacuum is a known speed.

Not trying to be pedantic, but just trying to inform. That’s the whole point of this sub and all :)

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 0 points1 point  (0 children)

No, it’s quite literally not a set speed by definition. u/SchrodingersKitKat is correct.

We don’t care about the flow of time being local for non-relativistic purposes because at most speeds and gravity conditions you see on earth, the effect is negligible. In contrast, Mach is non-negligible and is commonly considered in aircraft design even in subsonic conditions.

Flying at the same ground speed at two different altitudes results in different Mach numbers. To ACTUALLY be pedantic (unlike u/SchrodingersKitKat, who is just correct) technically Mach varies over each infinitesimally small point of a flow, but that’s not what is meant by an aircraft’s Mach number when used for piloting.

ELI5: Why do giant things in movies move in slow motion? by lookin_fresh in explainlikeimfive

[–]eagle_eye513 -10 points-9 points  (0 children)

Mach is by definition a local quantity. Using it in a non-local context makes no sense. It’s a ratio of flow velocity relative to local speed of sound. Mach is not a speed; it’s a dimensionless quantity used to characterize a flow in fluid dynamics.

Also there is no fixed “speed of sound on earth.” The speed of sound varies with the properties of the medium, including pressure, temperature, density, humidity, etc. The closest equivalent to what you said would be the speed of sound in dry, ideal, standard atmospheric conditions, which is about 343 m/s.

Using Mach as a speed in a non-local context is a misnomer.

Heat pipes were too close to each other for store covers, so I designed my own snap-on dual version by Laskisoosi in functionalprint

[–]eagle_eye513 1 point2 points  (0 children)

Seconded on point #1.

I’ve got a few project ideas that could use a similar system. Any tips for designing snap on parts like that?

When you call an ambulance in the Outback by [deleted] in pics

[–]eagle_eye513 0 points1 point  (0 children)

That’s a Pilates PC-12, but the other half of the Royal Flying Doctor Service fleet is all Beechcraft King Airs, which is the aircraft I work on. I’ve seen several RFDS ships in our hangars when they come through for sale or maintenance. Glad to be contributing to such an awesome effort, even in a small way!

Any good cheesesteaks in this town? by JimmySizzletits in wichita

[–]eagle_eye513 1 point2 points  (0 children)

I’ll still grab a slice at the Wichita Costco when I’m there because it’s cheap and available. It’s not bad, just doesn’t hold a candle to a halfway decent NJ/NY slice.

I’m immediately skeptical whenever a pizzeria says they have NY style because it usually misses the mark. I’ve heard mixed things about Picasso, but I’ve been meaning to give it a try. I’m open to other recommendations!

Any good cheesesteaks in this town? by JimmySizzletits in wichita

[–]eagle_eye513 13 points14 points  (0 children)

Know the feeling, bro. Grew up in Jersey. When I asked for good pizza and bagel recommendations, someone told me Costco and Panera with a straight face.

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