What are /r/EngineeringPorn's favorite Products & Services?

From 3.5 billion Reddit comments

This wheelchair costs less than $200.

You don't need two feet if they cost $400 each.

Bet you get a loud "snap" when that engages.

These work good and you don't have to remove the door and use fancy tools to install. Not as high tech tho.

The link everyone actually wants

https://www.amazon.com/Fantastic-Machines-Coloring-Amazing-Imagined/dp/1452155984/ref=sr_1_1?ie=UTF8&qid=1531381653&sr=8-1&keywords=9781452155982

edit: I didn't buy it last night and now it doubled in price. Thanks guys.

Pro tip, vents are actually more about allowing air into the pipe to supplement the water volume moving out. Many installs use one-valves for their vent, where venting to the atmosphere isn't feasible.

Air admittance valve

https://www.amazon.com/dp/B0039OEMT4/ref=cm_sw_r_cp_awdb_t1_OFlLAbWFV752C

Moving Heavy Things by Jan Adkins

"The almost forgotten craft of shifting large weights with brains instead of engines. Beginning with practical rules for moving like Get the Ming vase out of the Room. All the way out, and What goes up comes down heavier. This is a fascinating description of applied physics in the real world. If you move engine blocks, concrete mooring sinkers, or nothing heavier than this book from table to lap, you'll enjoy the encouraging narrative and the precise drawings. Not everyone moves coffins with marbles or sheet steel with baseballs, but you might very well find an idea to help you move Uncle Harry's monstrous bathtub out of the basement, or a reluctant oak stump out of the yard."

I think this is it in action.

And another user pointed out that this is the amazon link. I might get one myself, kinda cool!

I'll use it to power my Galaxy Note 5! /s

Later in WW2, German U-boats were being decimated because they had limited range on battery power while submerged. They invented a snorkel device for the intake and exhaust to allow submerged running on diesel power.

The crews hated them because they couldn't track waves well enough. When a wave interrupted the airflow, every crew member paid the price with their eardrums.

PS. Iron Coffins is a good personal account of what it was like as a German.

Just looking at it you can see the case is 3d printed. I doubt it's anything more than someone's personal project.

Edit: nope, I'm wrong. Here it is in Amazon. https://www.amazon.com/Hyquadio-Hydro-Powered-Bluetooth-Speaker-Waterproof/dp/B07P9LH1XL

In what world is that the "shittiest" lightsaber?

I like how the "sponsored products related to this item" includes this $172,443 5.4 ct diamond ring. Pretty sure the only way they're related is they fall into the "Stupid Uses of Money" category.

Also it's available with free shipping if you have Prime! I wonder if they'd actually ship it if someone purchased it or if they'd do a courier service.

Wow, what a cool gimmick! It's too bad it's a kickstarter, so it's unlikely anyone will get something like what's being advertised.

If only there was a product available on amazon that did the same thing and is available immediately... Oh wait, there is!

Calculated Industries 6135 Scale Master Pro XE https://www.amazon.com/gp/product/B002O16VLA/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

The scale master can measure actual length, as well as drawings printed to scale. It does cost a little more, but it's from a reputable company who has been making these for years, trusted by professionals.

Page 22 on of this.

>But the truth is that with mean water level there would have been a clearance of 2-3 metres when the Allure passed under the Great Belt Bridge.

>It is also a myth that the squat effect would have any significant effect on the draft of the vessel when passing the Great Belt Bridge. The water is too deep.

We have a plastic version of that at my parents Chalet.

Here’s a link to the amazon equivalent of what we bought: https://www.amazon.ca/2x4-Basics-90110ONLMI-2x4basics-BenchTable/dp/B0015XGCN0/ref=asc_df_B0015XGCN0/?tag=googlemobshop-20&linkCode=df0&hvadid=292963272694&hvpos=1o1&hvnetw=g&hvrand=13125981951500868275&hvpone=&hvptwo=&...

> fan

yup: https://www.amazon.com/dp/B017LSJKGS/ref=sspa_dk_detail_1?psc=1&pd_rd_i=B017LSJKGS&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=21517efd-b385-405b-a405-9a37af61b5b4&pd_rd_wg=ZihDz&pf_rd_r=6H3QKV9BX26Z93V72HQE&pf_rd_s=desktop-dp-sims&p...

Amazon? They're pretty common.

If you want some real cool stuff though, go see what /r/flashlight can do with some 18650's.

There is a video game called BeamNG that features realistic crash simulation (nothing like this video though). You can download a free tech demo from their website:

http://www.beamng.com/content/

Admiral Hopper is a true credit to the US Navy. She's also responsible for helping popularize the phrase 'better to ask forgiveness than permission' and the term 'de-bug' in reference to computers.

It was in the book "Skunk Works" by Ben Rich: (assuming my memory isn't shot)

https://www.amazon.com/Skunk-Works-Personal-Memoir-Lockheed/dp/0316743003/

Here are two more pictures: https://imgur.com/a/0zwdV

One is from a distance is was taken from a high-rise in Rotterdam centrum. The Aegier crane is fully raised; it's the tallest thing around by a good margin. Huisman's production hall is the big cube to the left.

The chain lift sound comes from the safety ratchet, called a Safety Chain Dog.

It is incredibly difficult to design circuitry and shielding that is responsive at the frequencies those things are capable of measuring.

http://hackaday.com/2015/02/10/the-one-million-dollar-scope-teardown/

The video in that article has some good info and pictures of the internals.

Amazon to the rescue!

FYSETC 3D Printer MK3 Spring Steel Sheet Heat Bed Platform, MK52 Printing Buildplate with Hole for Reprap Prusa i3 MK3 MK2.5 https://www.amazon.com/dp/B07LBQ57WV/ref=cm_sw_r_cp_api_i_A6vjDbT7H44T6

I just realized this picture is of some kind of wire rope. Not actual cabling used to transmit power. It probably cost substantially less. It actually looks very similar to some of the aluminum wire we used to run, with quite a bit more ground.

So yeh, this stuff is probably much cheaper than what I was talking about.

edit: also... alibaba has everything... http://www.alibaba.com/products/F0/armoured_cable/CID14190408.html?spm=a2700.7724838.12.2.w7Wkzt

Well it is a speed cube, but hardly anything special, this is the cube they used. $6 bucks on amazon.

Like this:

( ͡° ͜ʖ ͡°)

But seriously though, the easiest way is to just copy and paste.

Or the Look Of Disapproval app is great too.

Adblock has an app for Android devices, but they removed it from the Google Playstore a couple of years ago. Here's a direct link to the app if you are interested. You should still watch the video though.

according to Amazon, the shipping weight for this couch is only 120lbs... which is hard to believe but it does appear to use aluminum tubing for the frame...

On the internet of course

There are others out there. I'm not too sure how they all compare, but I've got one of the big boy versions of this one and like it.

Awesome! I should save those images to my "historic archive" folder.

Edit: archive.org already has it so I'm content that it's safe.

https://books.google.com/books?id=Mu7MmTXkPeAC&pg=PA648&lpg=PA648&dq=antiferrimagnetism&source=bl&ots=r-JHYk7Ipm&sig=Kf8k6j_fOfCgbh2dvJ1R7lJDZwQ&hl=en&sa=X&ei=6uQtVfKBIqm1sASC14GYCw&ved=0CCwQ6AEwCA#v=onepage...

This was the only thing I could find.

>Exactly on schedule, at 01:00 last night the mega transport of the temporary Suurhoff Bridge left from the quay at the pre-construction site in Krimpen aan den IJssel. The transport has successfully passed through the center of Rotterdam and is now on its way to the Maasvlakte. In the night from Friday 14 to Saturday 15 May, the temporary bridge here will be laid next to the existing Suurhoff Bridge (A15). This event will also be able to be followed live on this YouTube channel.
>
>The transport with the arch bridge of approximately 200 meters long, 20 meters wide and more than 40 meters high passed successively the Van Brienenoord bridge, the Hef (former railway bridge), the Koninginne bridge, the Erasmus bridge and the Botlek bridge.

​

Translated with www.DeepL.com/Translator (free version)

Using google translate

This was made in a fablab, which means all the design files are open source. You just need access to a laser cutter. http://www.thingiverse.com/thing:248009

If there's a fablab near you the people there will probably be happy to help out.

FYI: the Tesla S plant

An aqueduct, as your definition says, conveys water. That is, it moves water.

Canals don't necessarily move any water, especially in cases where they're built for ships.

So if your canal primarily serves to move water with no water traffic on it, perhaps an elevated portion might be an aqueduct.

If you canal primarily serves to move water traffic, then perhaps an elevated portion might be a canal bridge.

And it all might depend on the language and where you live that has such things, too.

I mainly know about canal bridges because I play Simutrans, which has them in some paksets. :)

Any chance you could post the stl files you used to 3D print this? I've got access to a nice 3D printer and I'd love to try to print a copy.

Edit: nevermind, found it! Also, there's a video of it moving here: http://grabcad.com/library/mobius-gear

All of his work can be found here : https://dribbble.com/derGoldstein

You were correct... He refers to the use of 'Blender' (https://www.blender.org/features/) to do the primary work, which exports the images which are then animated in other packages.

I don’t know, the Oxford dictionary doesn’t exclude bending forces from a pure Tensegrity structure.

Also this article outlines 7 conditions for a tensegrity structure that also do not exclude bending forces as well.

Idk, just seems petty to me to exclude this structure simply because there are some bending forces at play, but that just my opinion.

https://www.amazon.com/dp/B005BYFLHC/ref=cm_sw_r_cp_api_glt_fabc_7XQYXGXP6RJFNK3WE1ZQ

I had one some years ago — it was pretty cool but unfortunately died on me after a few months. Never did figure out what went wrong with it.

> you'd need a lot more than the cutaway drawings of Fat Man from Wikipedia.

For a simple gun-type, you'd instead need the exacting cutaway drawings from Amazon.

The main difficulty in re-manufacturing a gun-type from the stolen core of an implosion type would by the physical challenge of re-forming the core. Heavy metals are not easy to work with. There is also the problem that a gun-type needs 2x/3x the minimum critical mass to function, but as long as you stole a large enough implosion-type device you would have sufficient material.

There is a book entitled Manifold Destiny that gives recipes and how-to's. I think it's still available on amazon. I've made a few, even on modern engines. Just have to remove some of the plastic.

Edit: https://www.amazon.com/dp/1416596232/ref=cm_sw_r_cp_apa_i_GcjfFbGC0V4MC

Yeah, it is honestly a bit of a complicated issue. I have been reading this paper: https://www.semanticscholar.org/paper/A-CONCEPT-OF-THE-VORTEX-LIFT-OF-SHARP-EDGE-DELTA-O-C./95ae37d161b74f0a060f95718ad43bb3679d86d5 among others while making this and it is fascinating to see the different formulations and attempts to model the phenomenon.

I found some more views of it if you're interested: https://www.behance.net/gallery/10745551/Clockwork

Looks like the chamfered edge of the smaller gear pushes on the horizontal one. Seems like it would wear easily, but I suppose it should work.

>Microwaves penetrate through a wet rag just fine.

Actually, water is an excellent insulator for all types of radiation. At the gamma-level of radiation, they have a halving-thickness of 18cm.

I did a quick google search and found on a microwave-level of radiation, permeability is only at 1.4cm at 25°C, decreasing in length as you increase temp. It may definitely not be 1.4cm of water, but the paper towel wrap is enough to shield most of the electromagnetic radiation from getting to the bearing. Microwave Power Engineering Applications

>Toaster oven and patience is a better plan.

Patience however, does tend to win over everything. Stupid patience....

You don't always have the choice of what angle you attacked at. In an ideal world, you attack the enemy from the side or the rear, yes, but the enemy is not always so obliging to you.

Also just looking at wikipedia numbers can be misleading. Different countries tested their guns against different quality armours, and different countries also used different quality armours in their tanks, with Shermans for example having a relatively soft steel that allowed greater penetration, but resulted in much less spalling. Russian and German tanks tended to have much harder armour, so it would have a higher chance of outright deflection, but failures became commensurately catastrophic.

Also, the test results I linked above was US 12th army group tests done at Isigny using actual real world guns and captured Panther tanks. Their conclusion was that they could not reliably penetrate the glacis of a Panther using anything other than the APDS rounds for the 17lber, but those same sabot rounds were so inaccurate as to be useless.

It's hsm if done right it pulls the heat away with the chips, extends tool and machine life, and gets the job done much quicker. When I first saw it I thought it was insane. It's really fascinating and was not really possible until we got powerful enough computers to control it. That's not my presentation but I did a similar one recently. https://www.slideshare.net/mobile/nikhilkashyap125/high-speed-machining-hsm

> it looked like it had the info I wanted you to read in it

Wait, it looked like it had the info about Bill Gates' evil plan to kill 99.93% of the world in it? Where?

There's actually a couple of ways that they can lift stuff, and sometimes they stack stuff.

There's actually a great slideshare presentation that shows them doing this and also shows the drydock functionality where they can put a dam in place and pump the water out.

Sound weird maybe, but they've basically made menstrual pads for hats that realllly help bald bros like us. Check them out:

https://www.amazon.com/dp/B072C1VL1D/ref=cm_sw_r_cp_apa_glt_fabc_13CSZMYK11J26FPPAJGC?_encoding=UTF8&psc=1

https://www.amazon.com/dp/0132108089/ref=cm_sw_r_cp_apa_glt_fabc_S48455HES3S421T6KGDN

This way the one I used and I found it to be very straightforward.

https://stuff.mit.edu/afs/athena/course/2/2.151/www/Handouts.html

I also found these Handouts from MIT to be great resources and a good starting point

eighty bucks on amazon (no that's not a referral link), but apparently they can go into the thousands for a set.

Here you go!

https://www.amazon.com/Cat-784C-Tractor-Towhaul-Trailer/dp/B00BQU3O10.

I own one of those to go along with my Norscot Caterpillar models. Yes, the Towhaul trailer model is ridiculously huge compared to a model of a Cat 988 front end loader (probably the largest loader that people would see out in public).

They are plastic test tubes from a kids Science kit off of Amazon, I asked our Admin Assistant to get me something to display the soil in and then I over built the stand because I didn't like the green plastic cradle they came with.

https://www.amazon.com/Teacher-Created-Resources-Activity-20722/dp/B01AXBGWZW/ref=sr_1_10?dchild=1&keywords=test+tubes&qid=1600831260&sr=8-10

I'm not sure where you looked, but they are not always that expensive. Also, you can buy yourself one of the rollerball refills to use until you can save up for the body of the pen. The refills are only like $8 :)

https://smile.amazon.com/LAMY-Swift-Rollerball-White-L334WE/dp/B00L1B8LZS

Oh, not sure if you know this or not, but you can buy wireless charging adapters for phones. I bought this for my second to last phone, and worked pretty well. (I ended up needing to put the phone into the charge upside down)

Quick amazon search puts that specific machine at a cool $6950.00

I’ve worked on smaller optics and we used KimTech wipes

I would recommend buying an Arduino microcontroller kit like this:

https://smile.amazon.com/gp/product/B01D8KOZF4

This kind of kit teaches you how to program a microcontroller to do various electro-mechanical things.

It starts off very simple - you write some code to blink an LED on the Arduino board itself.

Next, you will create a circuit with an LED and a resistor and control that with code and the Arduino board.

Projects progress through a variety of things. Using switches or buttons as inputs. Turning motors on and off. Controlling servo and stepper motors to move things precisely. Using input sensors like ultrasonic detectors to measure distances and then acting on that information.

IBM released tiny hard drives you could use in devices that hard a compact flash connector

https://www.amazon.com/IBM-Microdrive-CompactFlash-Card-Adapter/dp/B00006B8PJ

Teardown :https://www.youtube.com/watch?v=y-jjphFgrek

Newton was a fucked up guy, but he seems to have been pretty asexual and probably autistic from what I have read about him. He doesn't mention anything overtly sexual in his secret sin journal either.

Indeed I am working on new videos. It is the companion series to a book coming out on March 23, 2023 link. It's on the engineering method: how engineers solve problem. I am at work right now on developing the videos (and by that I mean I should not be on reddit, but I should be writing at this moment). I was slowed down by a) my studio being out of commission for nearly two years because of construction in my building and b) the pandemic -- it removed my workforce and I had to watch my children. Plus c), if we are honest, I am slow generally in creating videos.

It was a big claw harness with 4 long arms that each clamped to a wheel.

Like this: Bruder 02750 MAN TGA Tow Truck With Cross Country Vehicle https://www.amazon.com/dp/B003543KXM/ref=cm_sw_r_cp_api_i_Y6459M5X7464C5CZNBQT?_encoding=UTF8&psc=1

there is a great book "The Chrysler Building : Creating a New York Icon Day by Day" which is mostly made up of hundreds of builder photos (of high detail) some guy saved from going to the dump.

It shows in great detail the building of the foundation as well as much of the rest of the construction.

https://www.amazon.com/The-Chrysler-Building-Creating-York/dp/1568983549

I've found it at at least 2 public libraries

.

As with all the neatest stuff, it seems, this jewel is brutally expensive.

https://www.amazon.com/1500W-HandHeld-Welding-Machine-Welder/dp/B08DTMTJ8Y

https://www.amazon.com/Cloudray-Welding-Wavelength-Handheld-Machine/dp/B0948S3NDN/ref=asc_df_B0948S3NDN/

Maybe this?

Tbf, metallurgy and blade design have a lot of science and engineering involved in them. This book is pretty great for anyone interested in that side of things, easy read: https://www.amazon.com/Knife-Engineering-Steel-Treating-Geometry/dp/B08D4P9D95

That said, this particular piece looks like someone just had some fun with a CNC machine and some metal. It would be a big stretch to call it engineering.

Yeah, SMD with a soldering iron is a massive pain... A hot air gun isn't that expensive though if you're ever doing more than one this one seems fine and is on Amazon for $43

The "solder just knows where to go" is due to the properties of the soldermask and the solder's surface tension when liquified. Experience (and flux) helps but the magic is in the engineering behind PCBs.

They're much bigger than you would think. I had to help carry one out of the woods once and it took 4 guys. Wrapped it up in fiber/strapping tape into a long tube and carried it on our shoulders.

Example: https://www.amazon.com/Chinook-helicopter-prepare-aircraft-Stocktrek/dp/B07C5BV4W2

Anyone interested in digital logic and making stuff like this in verilog should check this book out: Designing Video Game Hardware in Verilog https://www.amazon.com/dp/1728619440/ref=cm_sw_r_cp_api_i_4PY49BWNWA6ZN1MSB96V (it taught me more than school ever did about implementing hardware systematically)

Here you go, bud. That's just an example, but what you'd be looking for is often called a torque-a-verter. From here you'd just need shafts and couplings. Your local trade school will likely have an area you can 'rent' any machine you don't have, you'll need a lathe to make a good shaft, and any student or teacher there will likely love to help you out.

VOICE OF EXPERIENCE: If you wanna put a cheap whacker motor on a longboard, make sure your board has nice trucks and bushings, and tighten the fuck out of the bushings. Also, find a way to quick disconnect the spark plug and tie the disconnect to your belt or something so the engine cuts when you fly off the board.

There was a whole animated cartoon based on that screwdriver head! . correct me if I'm wrong but it's primarily used in residential and commercial electrical panels.

I know, right? They can be assholes about their image after the Purrari Cease & Desist, but damn can they engineer. Here's a TIL someone posted last year.

Two ways to test tube specimens:

1. Cut what’s known as a “dumbrel specimen”. This is easier to fixture and you convert the results.

2. Insert a mandrel into the tube to keep the circular profile while it’s under tension.

Here’s an entire presentation on testing tube geometries:

https://www.slideshare.net/mobile/Instron/pipetube-challengesfinal

I don't know about the reduction gearbox and treads, but it looks just like the Stirling engine I got here:

https://www.amazon.com/gp/product/B08S7J4S55/

Prins Clausplein

https://www.openstreetmap.org/?mlat=52.06218&mlon=4.375742&zoom=11#map=15/52.0622/4.3757

In the meantime, here's a cool Android app that shows several possible configurations of the Antikythera mechanism. It'd 3D and animated!

https://f-droid.org/repository/browse/?fdfilter=antiky&fdid=com.fivasim.antikythera

FP 50 D I used to operate before everything went digital in 2009.

https://postimg.cc/BjGwHrt1

Some old footage for your clickety clack pleasure (turn volume down before clicking link).

https://sendvid.com/tr427z7k

I think the point I'm getting at is that in 100 years we haven't really had a valve design that can compete with poppet valves on mass produced commercial ICE engines. I guess desmodromic valves are a thing http://www.wikiwand.com/en/Desmodromic_valve

But I understand they need a lot more maintenance. It seems that something would have replaced them or improved on the design. I guess rotary vavles are the holy grail but I assume people way smarter than me have explained why that could never work.

Fun fact: Lava lamps are also chaotic and if you take a photo of a wall of lava lamps every second, you are sure to get a different picture every time that is truly random.
Cloudflare uses these pictures by hashing them to create random encryption keys.

> They recreated the graphic for their own animation which does not need a reference

Does it not? I'm not sure. To me it seems like it still requires a reference as per licence of the image (CC BY-SA 3.0). Doesn't it fall under "ShareAlike"?

> if they did give a reference it wouldn't be to wikipedia, it would be from the original content creator

I know. I was saying it is the minimum they could have done. Exactly like how TV channels have in the past credited videos from YouTube as "Source: Youtube".

This seems to be the source of the animation. It also answers some of the questions posed elsewhere; the lower cam seems to just be an extra lock mechanism to keep the thing working smoothly.

Water bombers operations are common in the south of France in summer. I guess that every boat owner and skipper is on the lookout, and that port authorities and the coast guard issue general recommandations as well as situational warnings.

Also the planes depicted here belong to the Securité Civile, which, despite its name, is a military organisation. They are universally regarded as heroes. So, in the unlikely event of a collision, the perspective of starting a litigation and obtaining compensation is so ludicrious and remote that I'd suppose every skipper manages to stay far out of the way by every possible mean.

That being said, accidents do occur

Most of them are contraptions like this where you twist these tension rods against the tree. To adjust the angle of the tree, you have to loosen one side and tighten the other. It can be frustrating.

Also Bing house destination. I doubt they are squeezing it in that parking gap, so will probably replace the dirty looking apartments.

You should check these boards out. You get full Linux on a 1GHz, dual core processor with USB2.0, HDMI output, and some other coolness. For $49.

Edit: Not something to be put in a final product, but it could be invaluable for testing.

Well the actual fusion of two metals is what differentiates OAW (Brazing) from GMAW, SMAW, and GTAW for example. If we want to be even more technical I to brazing it is actually called OAW, which is Oxygen (Oxy) Acetylene Welding.

Cambridge dictionary defines welding as joining two metals together permanently (That the saved you a click version). So I guess you could technically consider soldering welding as well, but extremely mild welding.

COLOP e-Mark Electronic Marking Device/Multi-Colored Imprint/Digital Stamp/Mobile Printing. https://www.amazon.com/dp/B07ZKC5BYC/ref=cm_sw_r_apan_glt_fabc_AR6A1Z7WPDYSD4T450AX?_encoding=UTF8&psc=1

My coworker was raving about hers lol

Here, close enough. $98 Here, close enough.
https://www.amazon.com/Fortune-Products-Inc-Swinging-Sculpture/dp/B073G984Q7

As seen in Iron Man 2. https://www.youtube.com/watch?v=-MHiYDc5Z8Q&ab_channel=pdiu

these are the ones I got but the other ones are better. I use one side transmitters and the other side receivers. But these one are not that powerful and the phase shift is weird.

I will explain the parts more in the live stream coming up.

If you really want to get into the hobby, there's a CNC engraver on the market for about $250.

This will get you familiar with how the whole process works. But it lacks, well... everything, honestly.

People in the reviews say there is an adhesive, and that if anything the adhesive sticks too much to the shoe if left on for too long. I would bet there is a better brand for a bit more money that works good enough, but doesn't cost 1600 though. Or they have cheaper ones that have to be reloaded with the classic shoe covers.

https://www.amazon.com/Automatic-Protective-Machine-Covers-INCLUDED/dp/B088LMZLLR/

They do have much cheaper versions of these types of machines that don't shrink the plastic thermally.

https://www.amazon.com/Trimaco-Floor-Guard-Starter-Kit/dp/B00SZ0XLNA

That one appears to use a sticky plastic wrap, but for some uses it's probably just as good and it's only 100 dollars.

There are also lots of 30-40 dollar mechanical booty dispensers that dispense the classic foot covering with an elastic band.

I swear folks this is not an ad, I just play and love the game and this pic made me think of it.

If y'all like stuff like this you should check out World of Guns. Steam, Google Play

It should place them on one of these to make sure the rack is tight.

How is the machine loaded? Does it sort the balls?

A rapid link can't run through any kind of chain wheel, because the threaded barrel sticks out past the profile of the chain. Likewise, the threaded barrel is very vulnerable to any sliding or running of the chain, because it sticks outside the normal chain profile. These RUD links maintain the chain profile perfectly.

Have you seen the wooden model kits from UGEARS or ROKR? Lots of types available.

Great reviews too: Amazon

Seems like they missed a prime opportunity to make it self cleaning.

Seems like a gimmic. Those panels are probably only 50-100 watts max each. You can get that much power for less than $1200 on Amazon

i got mine on amazon. https://www.amazon.com/gp/product/B00I1CP2RA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Thank you do much! Pact Plate is really great.

The robot arm used was $199. It's this low cost one from amazon. Not exactly the most repeatable motion.