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Cheap & Simple Stirling Engine Generator

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This is the newest configuration of my small Stirling engine, designed to be as simple and inexpensive as possible yet reasonably durable. It uses passive thermosyphon cooling with about a gallon of water. With the generator and regulator it's able to run lights and radios, charge phones and other batteries, and a myriad of other uses.

Here are the components: SS water bottle cylinder, 2 tuna cans for heat shield and water jacket, soda can exhaust stack and water tower, threaded rod supports, cake pan base, mower tire flywheel, hard drive magnet balancer, standard 3/16" rod crank, inner tube diaphragm, aluminum bar frame, SS wool regenerative displacer, 3/4" plywood block and bearing supports, 7 stock ball bearings, a stepped pulley off Ebay, and a scrounged inkjet motor for the generator.

It's a little loud but not overly so. With the handle it's easily carried around. You'll notice that it takes very little time to get up to about 1,000 rpm when I crank up the heat.

Although it will run on many fuels, for my purposes propane is the most convenient. I refill my own propane bottles for about $1 each.

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