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General Engineering

- 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...
Jun23-14 12:38 AM
OmCheeto
1,027 232,366
You're just one click away from posting your homework help request! Click here to post.
May17-14 06:51 PM
Redbelly98
0 2,352
A number of questions, particularly involving homework, often involve some basic engineering. In the US, the...
Nov22-13 02:02 PM
rneale
38 60,560
Hey everyone, I have a fluid system of water coming from a pressure source. Then there is a converging nozzle,...
T 03:19 PM
npc214
1 10
Many linear flourescent lightbulb fixtures that I see have this series of transversal fins, such as in this picture:...
T 01:04 PM
Rabbit
10 455
Looks like it is time for round two... So for any of you who were following my other post...
T 10:28 AM
duhuhu
6 197
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Hi. I am trying to calculate the 'kicking out' force created when an object topples over. Attached is a picture of...
T 01:55 AM
derryck1234
2 291
I am trying to understand my superchargers isentropic chart. For an example case where a supercharger outputs 10m3/hr...
Y 02:40 PM
Billy22Bob
0 105
Hello, I am choosing glasses for a novel solar cell design, and part of the criteria is if the glass will be able...
Y 11:02 AM
Bandit127
2 257
I know that there is the equation to capture work of falling water using dams (power= head*flow*gravity...
Jul28-14 10:03 PM
gloo
11 401
I am performing Modal analysis on a fairly simple structure (a square aluminum rod with some pillars attached to the...
Jul28-14 01:55 PM
duhuhu
15 943
Hey! I am building a small scale wave energy converter for testing in a wave tank. I have my device almost ready,...
Jul28-14 10:14 AM
olivermsun
1 257
The proton current in cyclotron are normally measured by Faraday Cup. However, I do not understand that if there is...
Jul27-14 07:42 AM
mfb
8 481
Hello all, new member and amateur engineer from Tucson, AZ. I am working on a homebuilt, part 103 legal, ultralight...
Jul27-14 03:47 AM
DUMMY
9 9,363
Hello Everyone, I have several questions regarding the deflection of a free-standing pipe wherein Force is applied...
Jul27-14 03:27 AM
SteamKing
6 444
Over a decade back there was a company that sold air cooling devices for cruising sailboats. A sailboat at anchor is...
Jul26-14 01:21 PM
jim hardy
2 512
Suppose we want to take a picture of a highway at night, see attachments. As far as i understood, whether image is...
Jul26-14 11:21 AM
russ_watters
1 363
I recently started programming a basic web based app. that calculates the forces within a standard wood truss. I...
Jul26-14 06:11 AM
medeek
15 5,720
Hello I am a Junior Structural engineer and need to know how St Venant's torsion constant is calculated. It appears...
Jul25-14 07:39 PM
henneh
3 376
I was wondering how I would go about working out the energy required to cut a material (e.g. stone or steel) if given...
Jul24-14 09:02 AM
Simon Bridge
6 544
I'm having a bit of difficulty conceptually understanding a problem. Hoping someone here can clear it up for me. In a...
Jul23-14 07:35 PM
sanka
0 421
Hello, I was in a discussion with a Friend regarding cooling systems for computers. We were discussing different...
Jul23-14 07:10 PM
sanka
6 657
An operation, that in my opinion, is a once in a lifetime event. A few links that might be of interest to anyone not...
Jul23-14 06:54 AM
Borg
18 4,190
Hello. I am new to engineering and to imperial units, and currently learning by doing some exercises. I'm stuck on the...
Jul22-14 01:48 AM
kburgess
6 1,248
Hi, I'm working on a project that would take a 3d image using stereocopic camera and would record the depth and the 2d...
Jul21-14 05:35 PM
Baluncore
5 2,182
Hi there, I have been in contact with a manufacturer as I require both a pitot tube and a differential pressure...
Jul20-14 11:54 PM
jedishrfu
1 660
Trying to evaluate airflow around a vehicle and behind it to calculate where an object would rest after leaving driver...
Jul16-14 06:00 AM
B0b-A
2 1,834
i want to move a wheel of vehical in new test rig... i just knw tyre dia. 1.2 m .. load for perticular wheel is 8000...
Jul15-14 05:27 AM
dean barry
13 2,901
Attached is a picture of a stiffener bead on a metal link, my question is how does this shape help stiffen the part?...
Jul12-14 10:14 AM
xxChrisxx
5 1,897
Is it possible that I keep the typical working torque but increase the rpm by raising my voltage to my motor? I...
Jul12-14 07:24 AM
tygerdawg
3 1,792
Hello, Accidentally I have noticed a strange behaviour using two different magnets, which I would like to discuss....
Jul12-14 02:38 AM
SteamKing
5 2,000
In bowling, the ball will have a heavy spot marked as the center of gravity (cg). This will have an additional 1oz to...
Jul11-14 02:40 PM
Baluncore
5 1,968
OK. Hopefully you guys can help me. I could do this off of just trial and error, but I would rather not have to re-cut...
Jul11-14 01:30 AM
elegysix
1 1,642
Hi All, I have a problem I've been thinking about for a while, but I haven't come up with a really satisfactory...
Jul10-14 10:16 PM
olivermsun
6 1,862
I could use some guidance as to how I would analyse the stresses in a ring girder similar to the one shown in the...
Jul10-14 01:20 PM
SteamKing
4 1,758
We are working on an electronic solar hot water heater. We had it working but decided to change the way the...
Jul9-14 12:14 PM
frazelle09
12 2,599
The one in question: https://www.youtube.com/watch?v=0T2uYgreTR0 Hello, I currently have to build a timer for my...
Jul8-14 09:43 PM
elegysix
1 1,742
I have a closed 4" diameter cylindrical vessel with Volume=400in^3 filled with air at room temperature. A 3500W...
Jul8-14 02:21 PM
anolan23
24 4,833
Hello PF I want to dissolve a gas in a liquid. I figured I could create a closed loop vacuum system. I introduce...
Jul7-14 09:33 PM
SteamKing
5 1,975
Edit: I've realized that it's not called a 'jacketed pipe', but simply a double pipe heat exchanger. Apologies,...
Jul7-14 06:04 AM
Baluncore
1 1,671
I was thinking what is the cost efficient and energy efficient way for the new future homes to be. Since alternative...
Jul6-14 02:55 PM
AlephZero
24 6,051
Hi all, Yet another noob question from me... I been thinking of Solarthermal desalination plant lately but i'm...
Jul5-14 10:11 AM
willdo
11 3,687

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