Dr. Johnson's Heat Engine
This is a demonstration of Dr. Johnson's Heat Engine, a Nitinol based engine that works at very low temperatures. I bought it from the company "Smart Wires" in the Czech Republic.
Transcript:
Welcome to a demonstration of Dr. Johnson's Heat Engine (an application of Nitinol, a shape memory metal)
Spring made from Nitinol
Shrinks back to its orginal shape when heated
two pulleys connected with different sized gears
two idler pulleys
warm water
How does it work ?
Spring expands in cold water = it draws with less force
Spring shrinks in warm water = it draws with more force
Pulley with small gear has mechanical advantage over pulley with big gear so it "wins".
I'm sure this would also work with cold beer on the left and hot coffee on the right side.
But the resulting mixture of both would be an environmental hazard worse than nuclear waste.
Did you hear this ? This was me, angry about the mess I have to clean up.
I have no idea, why the image has turned to green color.
One of the many secrets of this Samsung NX500 Camera that I m using.
Hmmm. There are ice cubes left over.
I shouldn't throw them away. It's unethical to throw away food...
Let's see if I have some Bourbon. That would make a good supper, wouldn't it?
I have no idea who this "Dr. Johnson" is, but I will drink this Bourbon to his health!
And I will drink another bourbon to your health, guys , who are watching this video.
For every one of you!
I mean one for every one of you.
So don't share this video if you don't want me to become an alcoholic!
