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- The design, building, and use of engines, machines, and structures. For any engineering topics not applicable to the categories below.
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Jan16-12 Greg Bernhardt
We always have threads on various pieces of the puzzle, but what I want here is for people to post a coherent plan of...
Aug13-14 11:01 PM
jim hardy
1,039 237,935
You're just one click away from posting your homework help request! Click here to post.
May17-14 06:51 PM
Redbelly98
0 2,704
A number of questions, particularly involving homework, often involve some basic engineering. In the US, the...
Nov22-13 02:02 PM
rneale
38 61,956
I am making a ramps to load logs onto a portable sawmill. I would like to know the size steel tubing I need for logs...
T 03:25 AM
Baluncore
2 167
Greetings, I wonder what are the usual thermal efficiency for vapor compressor (refrigeration cycle), and only...
Y 03:15 PM
russ_watters
6 336
New here and this is my first post. I've developed an online psychrometric calculator and I believe it is now working...
Y 03:06 PM
penderway
8 539
Long time no post... I am very much disturbed after my research of measurement errors and corresponding norms,...
Aug30-14 11:55 PM
Mech_Engineer
1 390
Hi All, I am looking for a chart with A36 square tubing strengths. I am mostly concerned with tension strength but...
Aug30-14 09:49 PM
Mech_Engineer
3 506
Hi guys, 1. In this video: https://www.youtube.com/watch?v=Zdq4xsuH8a0 Could someone explain me how the linear...
Aug30-14 09:36 PM
Mech_Engineer
4 510
I've recently started doing a lot more residential structural engineering for local clients and the first thing that I...
Aug27-14 03:07 PM
henneh
2 364
We are working on an electronic solar hot water heater. We had it working but decided to change the way the...
Aug26-14 02:13 PM
frazelle09
13 3,043
Dear All, I am not sure if this is the right place or not for this post so i apologise in advance if not. I am...
Aug25-14 03:41 PM
boneh3ad
4 515
Hi! I recently tried to perform a simulation of a physical process on Comsol Multiphysics (namely I tried ot find...
Aug24-14 11:18 PM
enricfemi
5 884
Whom might be talking on this area?
Aug24-14 10:30 PM
MW Masailo
7 537
Hi, all. I was wondering what happens to sound if you've got two identical parabolas facing each other. ...
Aug24-14 07:30 PM
ScooterGuy
13 774
Dear all I'm designing an exhaust system for a wood working facility. Please correct me if I'm wrong as I'm new to...
Aug23-14 07:06 PM
mfb
1 524
I am wondering if my reasoning is correct for determining the energy due to the buoyancy of a deformed water surface....
Aug21-14 11:47 AM
private_donkey
2 269
Hi guys, I want a linear stepping motor to be able to apply an equivalent force 10 newton to push a syringe. How...
Aug21-14 06:13 AM
milesyoung
3 638
What size of HSS beem do I need to cross a 40 foot span with 500 kilos even distributed still weight. it will be used...
Aug18-14 04:53 PM
berkeman
8 571
Hi there im new to this site but I have been reading on it for a while. I have a question, I am building a...
Aug18-14 06:34 AM
yota4life513
4 269
I have some questions in regards to a diagram that has a twist to the regular set up that is usually used with...
Aug17-14 11:54 PM
gloo68
12 679
Hi everyone, First post here. Was hoping for some help from a pipeline guru. I am looking into the maximum flow...
Aug17-14 07:15 PM
gilesm89
1 314
A Thousand Kilobots Self-Assemble Into Complex Shapes...
Aug15-14 08:51 PM
Greg Bernhardt
3 577
Great movie clip from the HBO movie: The Pentagon Wars that shows how things get made when committees are involved: ...
Aug14-14 06:37 PM
256bits
1 431
Where i work has a chilled water loop to every building for the ac system. A rooftop unit has not been performing as...
Aug14-14 01:48 PM
Travis_King
3 443
If I have a flow , Q1 l/sec and a pressure P1 Bar , Pipe Diameter D1 how can I work out the change in flow if...
Aug14-14 12:14 PM
Chestermiller
2 367
I started commuting 65 km (40 miles) each day to go to work. This got me intrigued with the question of which speed I...
Aug14-14 10:41 AM
Darryl
6 479
Which are more efficient, Rocket Engines or Jet engines, and why? It would make sense that rocket engines are more...
Aug13-14 07:55 PM
Darryl
16 1,153
I'm building a small platform that is made of wood. It measures 40" x 12". It's also 1" thick. I have 4 hollow...
Aug13-14 03:04 PM
Lok
6 275
So I have built an incomplete rig to measure the pressure of a setup I have in a lab. The pressure sensor is hooked up...
Aug13-14 12:24 PM
jim hardy
7 373
I understand that work done if we have (510,000 Kg or 5,000,000 N) of water falling 30 meters (like in a dam) would...
Aug12-14 09:28 PM
gloo68
13 435
Hello, I am trying to find the required flow rate for stabilization of a bubble (to control the sinking and rising...
Aug12-14 01:49 PM
mfb
7 308
I'm working on a project that requires me to use a CNC metal cutter. I'm using LibreCAD to design the thing I need to...
Aug12-14 07:41 AM
AlephZero
4 378
Hi everyone. I feel there should be a simple answer to this but I can't seem to find anything on this. So I have a...
Aug11-14 03:16 PM
Chestermiller
8 340
Hello people. I'm thinking of using something like Twaron or Nomex fabric for a new application but one of the draw...
Aug11-14 11:11 AM
DaleSpam
8 464
Beam held up by two columns I apologize in advance if you think this should really go in the homework help area, I...
Aug11-14 11:00 AM
berkeman
11 412
Hi Everyone, I hope this is ok to post in this section this is my first time on here. I recently was watching a show...
Aug8-14 10:13 PM
Simon Bridge
5 413
Having recently taken up road downhilling, I want to investigate the feasibility of producing a personal, wearable...
Aug8-14 11:27 AM
berkeman
1 336
Hello, recently I have found this diagram http://www.cropcircleconnector.com/images/part4-12.jpg Also seen some...
Aug8-14 04:10 AM
litup
2 650
I have a pretty specific problem that I'm trying to solve and I'm out of ideas. I can't divulge too many details, so...
Aug8-14 01:04 AM
Lok
12 781
Hello all new to the forums but I have a question. I need to find out the force that holds two pressed objects...
Aug6-14 07:49 PM
mkpn24
4 578
Hi: I'm building a computer simulation for a 3 gear train system. So far the gears rotate with mouse movement...
Aug6-14 06:23 AM
TechFan
4 410
I'm having a bit of difficulty conceptually understanding a problem. Hoping someone here can clear it up for me. In a...
Aug5-14 08:29 PM
Chestermiller
5 756

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