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Top Questions

20 votes
4 answers
9k views

Why are wind turbines installed slightly "nose up" as opposed to the blade disk being perpendicular to the ground?

8 votes
6 answers
5k views

Can we add treadmill-like structures over the airplane surfaces to reduce friction, decrease drag and producing energy?

13 votes
7 answers
3k views

Wind farms that wind up in the wind, and then unwind producing energy when the wind is still

1 vote
3 answers
64 views

Is there a reason many EEE undergrad programms have a Complex Analysis Course?

2 votes
1 answer
150 views

How do I relate tongue weight to weight x distance?

1 vote
2 answers
102 views

Pump capacity calculation

0 votes
3 answers
119 views

Mechanism to engage and disengage a motor shaft

2 votes
1 answer
90 views

Generating 10 GHz Frequencies with Reasonable Power Requirements

1 vote
1 answer
79 views

Benefits of a steel ball in janka hardness test

1 vote
1 answer
61 views

Will this pulley system work?

0 votes
2 answers
69 views

How is this metal, hollow sphere manufactured?

-1 votes
2 answers
67 views

Electricity generation from sand particles in airstream hitting surface [closed]

0 votes
2 answers
62 views

Connect two motors to different planes and rotate them on the same center point

1 vote
1 answer
77 views

Developing a solar powered traditional river boat [closed]

1 vote
1 answer
53 views

What is this filter from an aluminium extrusion facility filtering?

0 votes
1 answer
67 views

Blasting - how to calculate the charge concentration Ib (kg/m)?

0 votes
2 answers
52 views

Can cascaded heat exchange system transfer more heat?

1 vote
3 answers
60 views

Self Locking Brake Question

0 votes
1 answer
35 views

Where should I restrict the flow of a pump?

0 votes
3 answers
72 views

Need help analyzing torque transfer and slippage condition between parts

2 votes
2 answers
72 views

Helical inserts on aerospace parts work intermittently

0 votes
1 answer
56 views

How are gauge blocks (slip gauges) manufactured?

0 votes
2 answers
54 views

What is the correct way to calculate the efficiency of a heat exchanger?

0 votes
1 answer
42 views

One way bearings

1 vote
2 answers
42 views

Division symbol in welding proceedure

0 votes
0 answers
65 views

Injection molding - Probability of plastic pouring into connector

-1 votes
2 answers
61 views

Will a lid hovering above bursting air bubbles catch smog particles

1 vote
1 answer
55 views

Tension and Shear on L-Bracket Offset From Wall

1 vote
1 answer
33 views

What are the issues with using a general purpose motor on a variable frequency drive?

0 votes
2 answers
42 views

Why does/doesn't this structure qualify as a truss/frame?

-1 votes
0 answers
50 views

What jet aircraft has the longest flight range? [closed]

0 votes
1 answer
48 views

What is this kind of drill-bit-like tool called?

0 votes
1 answer
29 views

What's the best way to mount many clock hands on a custom clock?

0 votes
0 answers
47 views

Error while using VWRITE command in ANSYS APDL

0 votes
1 answer
47 views

Does galvanization protects mild steel from corrosion even it crack or scratch?

0 votes
0 answers
47 views

The triangle of forces - Lami's rule

0 votes
2 answers
45 views

Is there a way to add a DIY knock sensor to an engine?

-1 votes
2 answers
35 views

So even though the raw materials of semiconductors are cheap why is their cost so high and why don't we use conductor for the same job?

0 votes
2 answers
44 views

Hollow circular columns vs solid circular columns of exactly the same mass and length, which resist buckling better?

0 votes
3 answers
44 views

Ideal way to create internal thread for 3d prints

0 votes
1 answer
34 views

Do cheap, low pressure (~0.25psi) pneumatic components exist?

0 votes
1 answer
43 views

Casting and the pressure of the metal

0 votes
2 answers
33 views

Passive raw water intake design (dirty stream)

0 votes
0 answers
42 views

Computing the velocity of water under reverse flow conditions from storm water drain

0 votes
2 answers
42 views

How can I calculate the pressure in a pipe?

-1 votes
1 answer
42 views

How to Link between Stoichiometry, Energy Content of a Fuel, Combustion in a Cylinder-Piston, and Otto-Cycle, Compression Ratio, & Thermal Efficiency?

0 votes
1 answer
25 views

Transferring image from one window to another

0 votes
1 answer
32 views

How does the maintain load test work?


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