Drinking Bird Engine Experiment

Get this famous physics toy from these sources: 
From Educational Innovations: BUY NOW: Drinking Bird Engine 
From Amazon: BUY NOW: Drinking Bird Engine 

Note: this site contains affiliate links for which I may be compensated

Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird

Drinking Bird Engine Experiment: what happens if you feed a drinking bird alcohol? This experiment compares the drinking rate (time per one full engine cycle) of two identical bird devices- but the glass on the left is filled with 70% isopropyl alcohol whereas the glass on the right contains tap water. After wetting the tops of both birds we count how many times each one “takes a drink” over a 5 minute duration (shown at x6 speed). This classic physics toy is a functional heat engine where cooling by evaporation at the head/beak provides the operating temperature difference. Isopropyl alcohol has a more rapid evaporation rate than water for room temperature and low humidity- so which bird will win? 

Einstein's Drinking Bird Toy

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From Etsy: BUY NOW: Fancy Drinking Birds

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Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird

Einstein’s Drinking Bird: this antique drinking bird toy was made in 1946, and this exact version sat on the kitchen table of Albert Einstein where many reports by friends and family told how the famous physicist was greatly amused by it, and that over a period of a few weeks he figured out its hidden operating principles. It turns out that this classic physics toy is a functional heat engine (swipe to see a familiar modern version) where cooling by evaporation at the head/beak leads to lower pressure in the top bulb, the pressure in the bottom bulb pushes the dichloromethane fluid (here dyed red) up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The process repeats, and as long as the top bulb stays wet and cooler than the bottom this heat engine will continue to cycle. 

Drinking Bird Heat Engine

Get this famous physics toy from these sources: 
From Amazon: BUY NOW  Drinking Bird Engine 

Note: this site contains affiliate links for which I may be compensated

Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird
Drinking Bird Heat Engine: time lapse of 15 minutes into 15 seconds (4 cycles). Cooling by evaporation at the head leads to lower pressure in the top bulb, the dichloromethane fluid rises up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The time lapse allows a clearer picture of how the fluid rises, shifting the center of mass, and how tipping makes the glass column lift out of the fluid in the bottom allowing the pressure to equalize and letting gravity pull the fluid to return to the base. Process repeats as long as the top stays wet. So much physics in one hypnotic toy!


Mini-Drinking Bird Heat Engine

Small and large drinking birds available here:

From Amazon: BUY NOW: Mini-Drinking Bird Heat Engine

See more drinking birds in my collection

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Mini-Drinking Bird Heat Engine: this hummingbird sized heat engine is the latest species added to my drinking bird collection. This little guy comes with the traditional top hat and his own plastic goblet- which is the perfect height for a standard drinking bird to share. Cooling by evaporation at the head leads to lower pressure in the top bulb, the pressure in the bottom bulb pushes the dichloromethane fluid up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The process repeats, and as long as the top stays wet and cooler than the bottom this heat engine will continue to cycle.

Rocking Stork Drinking Bird

This artisitic version of the Drinking Bird available here:
From drinkingbird.eu: BUY NOW: Rocking Stork

Get a standard Drinking Bird here:  
From Amazon: BUY NOW: Drinking Bird Engine 

Note: this site contains affiliate links for which I may be compensated

Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird
Rocking Stork: this species of drinking bird toy comes from the Czech Republic where each is crafted in blown glass by an artisan. This classic physics toy is a functional heat engine- cooling by evaporation at the head/beak leads to lower pressure in the top bulb, the pressure in the bottom bulb pushes the dichloromethane fluid (here dyed red) up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The process repeats, and as long as the top bulb stays wet and cooler than the bottom this heat engine will continue to cycle.

Vsauce Drinking Bird Heat Engine

This orange drinking bird came in my subscrioton to The Curiostiy Box- highly reccomended!
From the Vsauce team: subscribe today: The Curiosity Box

The classic drinking bird heat engine can be found here:
From Educational Innovations: BUY NOW 
Drinking Bird Engine 

Note: this site contains affiliate links for which I may be compensated

Drinking Bird Heat Engine: this classic physics toy came in my The Curiosity Box which provided this orange species of the bird complete with dapper top hat emblazoned with the Vsauce logo. Cooling by evaporation at the head leads to lower pressure in the top bulb, the pressure in the bottom bulb pushes the dichloromethane fluid up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The process repeats, and as long as the top stays wet and cooler than the bottom this heat engine will continue to cycle.


Drinking Bird Heat Engine

Get this famous physics toy from these sources: 
From Educational Innovations: BUY NOW Drinking Bird Engine 
From Amazon: BUY NOW Drinking Bird Engine 

Note: this site contains affiliate links for which I may be compensated

Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird
Drinking Bird Heat Engine: time lapse of 15 minutes into 15 seconds (4 cycles). Cooling by evaporation at the head leads to lower pressure in the top bulb, the dichloromethane fluid rises up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The time lapse allows a clearer picture of how the fluid rises, shifting the center of mass, and how tipping makes the glass column lift out of the fluid in the bottom allowing the pressure to equalize and letting gravity pull the fluid to return to the base. Process repeats as long as the top stays wet. So much physics in one hypnotic toy!