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SF.'s user avatar
SF.'s user avatar
SF.'s user avatar
SF.
  • Member for 9 years, 4 months
  • Last seen this week
30 votes
Accepted

How does a traffic light sense the proximity of vehicles?

21 votes
Accepted

Fracture patterns in tempered glass

20 votes

Is it possible to "pump" a powder?

16 votes
Accepted

Are pontoon bridges being considered to extend bridge span?

16 votes
Accepted

Could a gold/{second metal} crown be created that would pass the Archimedes test cost effectively?

13 votes

Is it possible to build an air compressor with no moving parts?

11 votes

How to make factory machine hard disk drive more durable? How much its estimate life span?

8 votes
Accepted

How to reverse the direction of rotational movement on the same axis?

7 votes

Alcohol as a working fluid?

6 votes
Accepted

Why air compressing mechanism "Trompe" is not popular in usage?

6 votes
Accepted

Fan performance curve

6 votes

Mounting and Coupling an Encoder

6 votes
Accepted

Why do most centrifugal fans found in laptops have tiny blades?

5 votes

Monorails - why even have them?

5 votes

Shape of chain saw teeth

5 votes
Accepted

the speed of the exhaust

5 votes
Accepted

Creating smooth shaft resistance

5 votes

What is the difference between pressure and stress?

5 votes

How do I refute this WTC argument?

5 votes
Accepted

What causes a fastener to lock?

4 votes

Small oxygen tanks

4 votes
Accepted

Is twisted belt configuration a good practice?

4 votes

How can I measure the thickness of a sedimentation layer in a closed tank?

4 votes
Accepted

Thermostat design properties

4 votes

When is DC power generation superior over AC power generation?

4 votes
Accepted

Best traffic control device/system for given situation

4 votes

How to sense displacement without using any camera?

4 votes

How to quantify martial arts strikes?

4 votes

Why does AN-94 have higher burst fire than its cyclic rate?

4 votes

Is this Square Track Cam valid?

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