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Civil Engineering by Angus Fuddledut - Fri, 09 Feb 2018 16:57:11 EST ID:sC8vxqle No.7166 Ignore Report Reply Quick Reply
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As is in the picture, why or what was the factors that made the construction go the loop rather than linear roadway?
Priscilla Pellywell - Sat, 10 Feb 2018 18:04:00 EST ID:ZOwxft1m No.7167 Ignore Report Quick Reply
either the height difference was too great for such a short length so they needed a more gradual angle so they stretched it out with the loop, or its for safety so people dont go rocketing from an expressway onto a slower speed street, so they slow down to execute the loop turn
Emma Dobberhetch - Wed, 14 Feb 2018 18:04:36 EST ID:Gcu3ZTpB No.7170 Ignore Report Quick Reply
yeah, I think its for trucks to trucks slow down, so they don't run over all those people standing at the bottom of the bridge. there's also room to run another roadway under there.
Samuel Fagglehood - Thu, 15 Feb 2018 15:45:09 EST ID:MRVxMXcW No.7173 Ignore Report Quick Reply
1518727509239.png -(297738B / 290.76KB, 1899x779) Thumbnail displayed, click image for full size.
if you look at the other side its quite clear this is the answer.

The Peace Ray and Power Switch by Fucking Dinderchot - Thu, 17 Apr 2014 16:32:33 EST ID:LNG8f7Rs No.6253 Ignore Report Reply Quick Reply
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First of all I would like you to share with me any of your ideas pertaining to particle based weapons. I do not care about efficiency.

Second: Has anyone thought about focusing whole cities worth of electricity to a single city block? What would prevent this and how destructive could it potentially be?
10 posts omitted. Click Reply to view.
Ian Pittfoot - Thu, 24 Apr 2014 01:09:32 EST ID:KULKiVdY No.6280 Ignore Report Quick Reply

Neither have you.
Shit Tillingbanks - Sat, 26 Apr 2014 00:21:13 EST ID:FMSlzPfk No.6283 Ignore Report Quick Reply
Focusing whole cities worth of electricity to a single block? Electricity isnt like light in that it can be 'focused'. You could make a machine which consumes the same amount of power as what a city would consume, but essentially you're looking at making a huge heater or fan or something which would never recieve full power because the city transmission network is equipped with protective devices to prevent exactly that from happening
Priscilla Turveyford - Wed, 30 Nov 2016 03:53:53 EST ID:wXQYwiD/ No.7022 Ignore Report Quick Reply
>Second: Has anyone thought about focusing whole cities worth of electricity to a single city block? What would prevent this and how destructive could it potentially be?
It would turn the air into plasma and melt/burn everything.
Prevention of an attack depends on the method of delivery. But I didn't propose any, I just told you what would happen.

It would probably be very fun to watch.. from afar.
Acaelus - Mon, 06 Feb 2017 19:25:51 EST ID:2e0ggO16 No.7043 Ignore Report Quick Reply
Probably more fun from up close.

But yeah how would the "power" be transfered to the block? What specifically is it transfered to?

If it is just transfered to everything equally, how high and low would the power be transfered into the atmosphere/earth.
Charlotte Blatherworth - Wed, 26 Apr 2017 18:20:59 EST ID:BbwchrDn No.7121 Ignore Report Quick Reply
x ~ -

Title 24 Energy compliance/Thermal properties of CMU by Molly Blabbleford - Thu, 15 Jun 2017 23:56:29 EST ID:ff47CWkA No.7135 Ignore Report Reply Quick Reply
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I'm trying to make constructions in trace 700 to match title 24 baseline requirments. Light/Heavy Masonry walls are giving me trouble. Its kind of a long shot to ask here but if there any Trace (or any energy modeling software) users that have done constructions for title 24 CMU's, I would appreciate a simple explanation of what you did to achieve baseline requirements for your constructions.

pick related

Smith-goodman diagram by Samuel Hussleham - Tue, 04 Apr 2017 13:00:35 EST ID:tgH2zb8W No.7117 Ignore Report Reply Quick Reply
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Hey, this is kinda long shot but here I go.

I want to create (or find) a program that will construct smith-goodman fatigue diagram for common steels. I'm studying mechanical engineering in eastern europe and the lectures weren't really thourough. I would really appreciate some help on this. Even some good literature online would be great help. Thanks.

picture is not related
Doris Tillingspear - Thu, 06 Apr 2017 12:28:34 EST ID:LMSWX1C6 No.7118 Ignore Report Quick Reply

As far as for steel, you might be able to request a data book from a major supplier, or see if they have PDF versions available for download.

GD&T for Dumb-dumbs by Samuel Bepperpure - Tue, 28 Mar 2017 22:02:10 EST ID:LMSWX1C6 No.7114 Ignore Report Reply Quick Reply
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What are some of the best GD&T resources that don't make you want to shove a nail through your eyesockets?

I've got The Ultimate GD&T Pocket Guide, and it's not to bad, but still self-referential in areas, or doesn't go into enough detail on certain subjects.

I think CNCookbook has a GD&T course, and I know his stuff is usually straightforward. I'll have to check that out sometime soon.
Shit Worringdock - Thu, 30 Mar 2017 12:51:10 EST ID:IZhvBj47 No.7115 Ignore Report Quick Reply
Your mechanical engineering high school textbook(s) perhaps?
I had 4 volumes, but they are long lost.
Barnaby Gindlekag - Thu, 30 Mar 2017 14:19:18 EST ID:LMSWX1C6 No.7116 Ignore Report Quick Reply

Never went to school for it, so no textbooks to reference.

Been in the manufacturing field working with my father as a kid, since the early 00's. The thing is that the old easy to read dimensional drawings are slowly being phased out in certain industries towards pure GD&T true position messes. It pays more if you're fluent in it, but it's certainly a lot of hieroglyphs that take time to get use to. .

Where to order custom plastic parts ? by Reuben Clockleway - Wed, 04 Nov 2015 16:48:00 EST ID:mF3DWO7C No.6830 Ignore Report Reply Quick Reply
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I hope this is the right thread.
Can anyone link me to a company that does custom plastic parts ? I live in the EU if that matters.
The part i need to order is a 10,5 x 10,5 x 1,5 box that is empty inside. How would you design a simple box like that so it would be nice to look at and access the inside?, Just make the bottom a different piece and add screw holders to the inside corners ? Also id like the product to be off the surface about 0.5 cm. What would be the best way to achieve this ? Legs ofc but any good ideas ?

If plastic molding is not the best option you can think of than what would be to produce around 50 of these kind of boxes for the beginning ? Was thinking about wood but it has to be commercially acceptable and if i need to make 50 boxes i am afraid they wont look all 1:1 the same hehh..

Thanks and dont mind the typos:) !
2 posts omitted. Click Reply to view.
Polly Clollerpig - Sun, 08 Nov 2015 07:57:49 EST ID:z0IUPjyn No.6833 Ignore Report Quick Reply
If you only need 50 make the boxes out of plywood or acrylic with a laser cutter.
It's way cheaper than 3D printing and manually assembling them isn't that much work.
A Wizard - Wed, 16 Dec 2015 01:49:50 EST ID:XN1Cd6M9 No.6854 Ignore Report Quick Reply

Find some fourth graders. I'm pretty sure they won't need much instruction.
Ernest Gabberstuck - Mon, 21 Nov 2016 15:07:37 EST ID:nz8yEnGt No.7016 Ignore Report Quick Reply


you can have them hydraulic pressed into forms that are in the shape and size of your desired plates, which you then glue or weld together. Also you dont even need it in the same size but you can cut them from bigger one.
William Hobberwedging - Thu, 24 Nov 2016 13:17:14 EST ID:LMSWX1C6 No.7017 Ignore Report Quick Reply
The Brits use to have a shit ton of industry in the day, and I have machines that are proof of those olden days of industry. Although every time I deal with them trying to get parts for said machines, they seem to be reluctant, because that they seem to really hate having to deal with international shipping. I mean I could refer you to a shit ton of shops within the US. Look up industrial parks in your area and then check out what's there. You might find some plastic molding shops, or at least some machines shops that make you molds for you to use. Little, dank job shops are usually the most desperate for work, but even mid sized 20+ machine shops will work with you off the street. Mega shops not so much.
Ian Turveyfoot - Sun, 19 Mar 2017 03:42:42 EST ID:IZhvBj47 No.7113 Ignore Report Quick Reply
Just make the boxes out of laser cut panels, either with acrylic or plywood.
That will be the most economical version if you make the CAD drawings yourself.

Arduino/rasp Pi or other by tech head - Sun, 25 Sep 2016 04:01:48 EST ID:0BrDnpk/ No.6998 Ignore Report Reply Quick Reply
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hey tesla/
does anyone know how to make an interactive audio installation using Arduino or Raspberry Pi to trigger pre-recorded loops that synchronize?

would love to create but dont know how!

Should I be on another board?

Think engineers would have a field day tho!
Fucking Banningstog - Tue, 27 Sep 2016 02:05:23 EST ID:OiQL0CQb No.6999 Ignore Report Quick Reply
Maybe /m/, that's a busier board, you're more likely to find some sound engie or roadie or DJ who knows how to set up stuff like that.
Sophie Tillingdock - Mon, 03 Oct 2016 13:19:43 EST ID:LMSWX1C6 No.7006 Ignore Report Quick Reply

What's your familiarity with programming and setting up software packages you've never used before? I'd say you need either a good intermediate knowledge of C++, or Java (takes more packages to get working) or whatever language they might have compatibility with now.
On the Arduino I'm sure you could copy paste from preexisting MIDI projects and customize it a bit. It would still be best to have fundamental understanding of the syntax and semantics of the language.
Now you could allows hook that to an old laptop and have the little MIDI controller you essential just made defined on your DAW.
If you insist on it being on the Rasberry Pi, you either got to find a preexisting similar project and configure it to your needs. You'll need a simple audio library that supports simultaneous sounds. I'm not sure how well the R-Pi can handle audio processing, if it's giving it to much trouble you might have to reduce the sample rates of the audio files.

So either some intermediate programming skills, or just try diving balls deep into the preexisting tutorials and projects and mangling them till they work for you.
Edwin Gizzleson - Fri, 21 Oct 2016 04:00:11 EST ID:H926XZ8b No.7010 Ignore Report Quick Reply
Charlotte Fullyridge - Sun, 15 Jan 2017 16:12:56 EST ID:umzRyjso No.7039 Ignore Report Quick Reply
yes i have a rasp pi and while it's a little piece of shit, I just need to get a case for it and install a touchpad.
It runs linux and will absolutely handle homebrew audio stuff, as you can absolutely add sensors like mic and audio in and there's both a 3.5 jack and an hdmi port that does audio out to the tv system.
right now I can play piano on my keyboard, mp3 & youtube.
add a midi pad and you can do digital effects with like garageband or fender fuse, something like that
I wouldn't bother with arduino
Cedric Goodford - Sat, 11 Mar 2017 14:42:10 EST ID:IZhvBj47 No.7112 Ignore Report Quick Reply
Get a raspberry pi 3, learn to set it up so it runs headless.
I'd use this for the task at hand, but your approach will differ.

Well at least you have to know some programming language already, right?

Flying by 2017-01 - Fri, 06 Jan 2017 19:50:34 EST ID:cbS5u/gp No.7037 Ignore Report Reply Quick Reply
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Anyone here likes jets? Helicopters?
Samuel Hemmercocke - Wed, 01 Mar 2017 15:06:37 EST ID:El6x3uF1 No.7111 Ignore Report Quick Reply
they should get rid of the cockpit and dumb down the f16 since it is going to be disposable

Newclear Womb by Skit Pwn - Mon, 30 Jan 2017 20:27:23 EST ID:xYshtut8 No.7041 Ignore Report Reply Quick Reply
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Does anyone have a copy of Multiphase Flow Dynamics 2: Mechanical Interactions by Nikolay Kolev? If not, where would be a good place to download it? I can't find any torrents.

If not, than hey here's a guy who says things...
Cyril Pittbanks - Fri, 03 Feb 2017 13:22:40 EST ID:LMSWX1C6 No.7042 Ignore Report Quick Reply
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Simon Crumbledetch - Wed, 22 Feb 2017 16:50:34 EST ID:E/liXdBm No.7044 Ignore Report Quick Reply
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SUPERLOOOOOOP by Nigger Pivingwidge - Tue, 13 Aug 2013 16:36:10 EST ID:NBJ0w/MW No.5836 Ignore Report Reply Quick Reply
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Musk finally put out some information on his hyperloop public transportation idea. It looks amazing, but I'm not really /tesla/ enough to know if it's really viable. Anyone here want to take a look? The attached link is the full text of the proposal.

5 posts and 1 images omitted. Click Reply to view.
Nicholas Sipperdale - Wed, 03 Feb 2016 17:46:19 EST ID:+u3PHuSh No.6892 Ignore Report Quick Reply
It's a short paper, and it's written in a casual manner, not like a dense near impossible to read academic journal.
Esther Breblingfield - Sun, 07 Feb 2016 04:34:33 EST ID:aW2jiyGc No.6896 Ignore Report Quick Reply
I hang out with Carlos mecia behind the del taco
2017-01 - Fri, 06 Jan 2017 20:53:35 EST ID:cbS5u/gp No.7038 Ignore Report Quick Reply
What's wrong with trains or light rail?
Henry Drallykog - Thu, 19 Jan 2017 10:22:22 EST ID:JLlZ+fjU No.7040 Ignore Report Quick Reply
The Hyperloop: BUSTED!
Simon Crumbledetch - Wed, 22 Feb 2017 16:51:55 EST ID:E/liXdBm No.7045 Ignore Report Quick Reply
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copying old parts by Wesley Clunnermodging - Thu, 26 May 2016 00:35:47 EST ID://p8h2A8 No.6963 Ignore Report Reply Quick Reply
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hey /tesla/

I'm an eletrical engineer that likes to work on old cars. While bidding on a nos battery bracket for my current project, it dawns on me, wouldn't this shit be cheaper if the people that had the parts, scanned them and got new stuff made, instead of us all bidding the few remaining parts up?

Does anyone know how I can get into making copies of the parts I have so others can use them? 3d scanning?

Some of these parts are pretty simple. Just various bent bits of metal with bolt holes and you assemble them into brackets for mounting this and that. I would think I could draw that up in autocad or solidworks. But finishing it is a bit beyond me. I have like 2 years of autocad but I was never trained on how to select metals or what I've always called "fit"

Like, how do I even draw the bold holes and the botls just right that when they build it for me, all the shit goes together just right and isn't too tight?

Can anyone help me with this?
1 posts omitted. Click Reply to view.
M - Tue, 31 May 2016 04:17:42 EST ID:l8g6dMpE No.6966 Ignore Report Quick Reply
Although 3D scanners exist (see link below) I`d advise what >>6965 mentioned and using your calipers to measure the parts, and either put it in a spreadsheet or draw them in free 2D or 3D CAD software (or AutoCAD if you happen to have acces to it). Mechanical parts are usually as simple as poissible and have rounded sizes in either inches or mm, so you`d probably be able to draw them without too much effort. As for hole diameters for bolts and stuff. there are tables for this on the internet you could use. Finally I`d advise 3D cad so you can draw the surrounding stuff as well. That way you can very easily see if a part you made fits or needs to be altered. If you still cant figure something out, you can probably find someone on the internet that is willing to help you out.

3D scanners do exist with a precision of about 16microns they are probably incredibly expensive.
Ernest Fisslebutch - Thu, 02 Jun 2016 17:12:36 EST ID:IZhvBj47 No.6968 Ignore Report Quick Reply
>3D scanners do exist with a precision of about 16microns they are probably incredibly expensive.
How does it work?

I wonder if you could archive such a resolution by mounting a gopro on a 3-axis cnc router and using the stepper resolution as reference to record a light field that can be resolved into a high resolution 3D model.

Or could this be the first real application of these lidar chips published in last years research?
Jack Honeyspear - Thu, 09 Jun 2016 11:45:51 EST ID:LMSWX1C6 No.6971 Ignore Report Quick Reply
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Go watch Dan Gelbart's series on prototyping and get a feel of how to become independent and less reliant on premade solutions for parts that you can belt out in minutes with some elbow grease. Some shears/tin snips/wire cutter/cut off wheel to cut the rough shape out. A drill press to drill and hand shape the rest(or hand drill and rotary hand tool). Brake bend with a few pieces of scrap board and c clamps, heat the radius with blow torch if it's really thick and use some harbor freight welding gloves to handle. If it can't be simply bolted and locktighted together, or glued, than consider making a spot welder from some microwave parts at some point.
As far as material. 10-14 ga. is probably fine for most project brackets. If things are under load then the housing, struts, bearings, and suspension systems take care of that, not mounting brackets.
Old appliances like computer panels and such are free source of thick sheet. Old tins from holiday containers are another source of thinner material.

Obviously he has hundreds of thousands of dollars of machinery at his disposal, but with the suggestions I made above you have alternatives for pennies on the dollar.


Some other things if you like having a layed out plan that helps are: dykem, paint pen, calipers, scribe, scale or carpenter square, radius gauges, and a compass.

CAD experience is kind of pointless if you don't have real world field experience. Don't turn into one of those guys that have twenty different true position tables and +/- .0001" on every dimension for a part that only needs saw and drill hole tolerances.
Get your hands dirty and make yourself a valuable go to designer.
Ian Denkinkatch - Fri, 05 Aug 2016 06:56:19 EST ID:/GtFGFci No.6979 Ignore Report Quick Reply

Some top quality advice from this guy. I agree with this so much it makes me wonder if I got drunk, posted this and then forgot about it.
2017-01 - Fri, 06 Jan 2017 19:40:43 EST ID:cbS5u/gp No.7036 Ignore Report Quick Reply
Borrow/rent some usage time from the local uni or science facility

Anyone built a free energy device ? by Rebecca Packlepure - Wed, 23 Jul 2014 12:30:50 EST ID:fTAGL71n No.6417 Ignore Report Reply Quick Reply
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I did and it sort of works.
13 posts and 4 images omitted. Click Reply to view.
Charlotte Gullerdere - Wed, 07 Dec 2016 16:10:21 EST ID:l8g6dMpE No.7028 Ignore Report Quick Reply
Forgot to add;
They would be awesome to play with though. Would love to make one some time.
Beatrice Gollyhitch - Thu, 08 Dec 2016 18:50:07 EST ID:ThLNXh+v No.7031 Ignore Report Quick Reply

thank you , puts it nicely into perspective
Betsy Turveyfield - Sun, 11 Dec 2016 20:47:08 EST ID:GWmaubj1 No.7032 Ignore Report Quick Reply

I've never seen these before but by the looks of it you can increase the power generated by using a bigger antenna. As something to translate reported voltages in to something relatable, the amount of energy stored in a capacitor is determined by the size of the capacitor and the voltage.

energy in joules = capacitance in farads * voltage^2 / 2
energy in joules = power in watts * time in seconds

So a 1000uF cap charged to 100 V has 5 joules of energy stored. If you could convert it to whatever kind of power you need with 100% efficiency it could run a 1 watt load for 5 seconds.
Lillian Womblehedging - Mon, 19 Dec 2016 03:08:43 EST ID:WiAbb/Pm No.7033 Ignore Report Quick Reply
Maybe we can get some slav to buy a bunch of car batteries and raid the local Radioshacks and hook this shit up to the Duga's over in Ukraine.
Nigel Nirrybure - Tue, 03 Jan 2017 20:37:26 EST ID:KdBRMlw9 No.7035 Ignore Report Quick Reply
theoretically would the circuit, if there is more length on the connected diodes , produce more voltage?

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