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How to Build a Can Stirling Engine in 10 Easy Steps

akikan How to Build a Can Stirling Engine in 10 Easy Steps

A Can Stirling Engine

(This engine was proposed by Mr.Saburo Tsucchida.
He is teacher of Kasukabe technical high scool.)

#1 – Prepare the materials

To build the most simple Can Stirling Engine you need:

  • 10mm-thick wood board
  • 10mm-thick balsa wood
  • 1.5mm diameter wire
  • a fishing thread
  • balloon (very important)
  • square lumber (5mm)
  • two thumbtacks
  • cardboard
  • candle
  • wood screws
  • rubber bands

You’ll also need some tools to get this done:

  • cutting pliers
  • scissors
  • saw
  • wood glue
  • super glue
  • (a drop of) machine oil

The Can Stirling Engine uses a wood frame, its crankshaft is made out of a wire, the cylinder from a can, and the diaphragm is that important rubber balloon. You’ll be using the fishing thread to connect the wood piston to the crankshaft.

 

aki 1e How to Build a Can Stirling Engine in 10 Easy Steps

Basic view of the Can Stirling Engine

#2 – Cutting the wood board appropriately

You have to make two side boards, two boards to fix the can, and a bottom one. All of them will be 10mm in thickness. The crank’s holes have to be a bit bigger to reduce friction with the wood.

aki 2e How to Build a Can Stirling Engine in 10 Easy Steps

#3 – Manufacturing the wood piston

After you fit the cut balsa pieces with glue, you can glue the fishing line to the center of the piston with SuperGlue. You have to take into account that the diameter of the can has to be matched with the one of the piston, so they fit into each other. You also have to provide a clearance of 2 or 3 mm.

aki 3e How to Build a Can Stirling Engine in 10 Easy Steps

 

#4 – Cutting he diaphragm

You’ll have to cut the (very important) balloon in two (just like in the figure) and reinforce it by sticking the cardboards to it. Then make a small hole in the middle of the cut piece and get the fishing thread through it. Warning, the hole has to fit the thread, not too big.

aki 4e How to Build a Can Stirling Engine in 10 Easy Steps

The Stirling Engine Diaphgram

#5 – Building the Crankshaft and connecting rods

Using the 5 mm square lumber, make the holes in the crankshaft a bit bigger (for less friction), put on the connecting rods and then bend the 1.5mm wire.aki 5e How to Build a Can Stirling Engine in 10 Easy Steps

#6 – Fitting together the Crank mechanism and Disphragm

Using two thumbtacks, attach the connecting rods and the diaphragm, just like in the picture below:

aki 6e How to Build a Can Stirling Engine in 10 Easy Steps

#7 – Building the frame

The crankshaft has to rotate inside the wooden frame with minimal friction, so please be aware of that when assembling them.

aki 7e How to Build a Can Stirling Engine in 10 Easy Steps

#8 – Construct a Wood Piston and Crank Mechanism

Remember that fishing thread you passed through the hole in the diaphragm? Now you have to link it to the crankshaft so it moves the piston along with it.

aki 8e How to Build a Can Stirling Engine in 10 Easy Steps

#9 – Setting up the can

The can is the actual cylinder of the Stirling engine, so cut off the top side of a can and fix the can to the wooden frame as well as you can. Then, put the diaphragm over it with some rubber bands. The length of the fishing thread has to be adjusted so that the piston doesn’t touch the can when moving. Put a drop of machine oil in the hole of the diaphragm.

And that’s it!

 

aki 9e How to Build a Can Stirling Engine in 10 Easy Steps

#10 – Operating the Can Stirling Engine

Like any Stirling engine, this one works with heat. Put a candle below the can and, when you consider it’s heated properly, rotate the crankshaft by hand.

Again, just like any other heat engine, the air has to be perfectly sealed inside and the parts have to move as freely as possible (with as little friction as possible). Otherwise, the engine won’t move, because its very fragile constitution and power source are only fit for experimentation (unlike a car that eats up more gasoline than normal when the bearings are used).

Good luck!

Note: the pictures above and the whole idea are not mine, I have to credit this site for them.


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About the author

Ovidiu has always been a fan of technology and Captain Planet. Unable to ignore the technical possibilities that exist nowadays, he started collecting and blogging about the most interesting news out there and saw that there were a lot of people interested in the same that stuff he was.

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